Combined cutting tool, calibration apparatus, and calibration method

Abstract

Some of embodiments of the present application provide a combined cutting tool, a calibration apparatus for the combined cutting tool, and a calibration method of the calibration apparatus. The combined cutting tool comprises a shank, a center drill, and end mills. The center drill is mounted at the center of the shank. The end mills are distributed around the center drill and are mounted in clearance recesses. The calibration device comprises a mounting base and a measurement mechanism. The measurement mechanism is provided with a clamping assembly, a positioning assembly, and a calibration assembly. The combined cutting tool is positioned and clamped, and is calibrated by means of a center hole standard block, a height conversion plate, a guide mechanism, and a calibration instrument.

Description

Combination cutting tools, calibration device and calibration method

[0001] Cross-referencing

[0002] This application incorporates Chinese Patent Application No. 202510004939.3, filed on January 2, 2025, entitled “Combination Tool, Calibration Device and Calibration Method”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of machining technology, and in particular to a combination tool, as well as a calibration device for the combination tool and a calibration method for the calibration device. Background Technology

[0004] In the machining industry, the machining of cylindrical workpieces is a common and important step. During the machining process, these workpieces typically require precise milling and drilling of their end faces to meet the positioning and machining requirements of subsequent processes. In traditional manufacturing processes, this machining is completed through two separate steps: first, a milling cutter is used to mill the workpiece end face to achieve the required flatness; then, a center drill is used to drill a center hole in the milled surface as a reference for subsequent machining.

[0005] However, this traditional machining method has many shortcomings. First, the transition between the two processes requires additional clamping and positioning time, which not only reduces machining efficiency but also increases the risk of errors. Second, since the two processes are performed separately, it is difficult to guarantee the positional accuracy and coaxiality between the milled plane and the center hole, which directly affects the quality and accuracy of subsequent machining.

[0006] To overcome these shortcomings, the industry began exploring the possibility of integrating milling and drilling into a single process. As a result, a combination tool integrating a face mill and a center drill was developed. This tool cleverly integrates the milling cutter and center drill on a single head, enabling milling and drilling operations to be completed simultaneously in a single setup, thus greatly improving machining efficiency and accuracy. However, it suffers from the problem of inconvenient center drill adjustment and inability to accurately position it.

[0007] This combination of cutting tools presents new challenges in practical applications. Because the positions of the milling cutter and center drill on the tool head need precise control to ensure that the machined planes and holes meet design requirements, tool installation and adjustment become particularly important. In particular, the height difference between the milling cutter and center drill in the Z-axis direction is a key factor directly affecting machining quality. However, this height difference is usually very small, and it is difficult to achieve the required accuracy using conventional measuring tools and methods, making tool installation and adjustment exceptionally difficult.

[0008] Furthermore, to ensure the machining accuracy and stability of combined cutting tools, regular calibration is necessary. Traditional calibration methods often rely on manual operation and simple measuring tools, which are not only inefficient but also difficult to guarantee the accuracy and consistency of calibration. Therefore, developing a device and method specifically for calibrating combined cutting tools is particularly important. Summary of the Invention

[0009] The purpose of some embodiments of this application is to provide a combined cutting tool, including: a tool holder, having a connecting part and a mounting part, the connecting part being connected to a machine tool tool post, the tool holder having a mounting hole at its center and a relief groove in its circumference, the mounting part being used to mount the cutting tool; a center drill, mounted at the center of the mounting part through the mounting hole, for machining the center hole of a product; and a face milling cutter, mounted in the mounting groove within the relief groove by positioning screws, and arranged in a circular array around the center drill, for milling the end face of the product.

[0010] In addition, a directional screw is provided on the mounting part. The directional screw abuts against the center drill through a threaded hole provided in the radial direction of the mounting part, and is used to adjust the installation direction of the center drill.

[0011] In addition, a fixed-length stop bolt is provided at the center of the tool holder, which is threaded to the mounting hole, and its end abuts against one end of the center drill, for adjusting the length of the center drill extending out of the mounting hole.

[0012] In addition, the tool holder is provided with a cutting fluid nozzle, which is provided through the tool holder along the axial direction, and at least one nozzle is provided and connected to the machine tool water circuit.

[0013] Some embodiments of this application also provide a calibration device for a combined cutting tool, including a mounting base and a measuring mechanism.

[0014] The mounting base includes a base plate, a top plate, and height-fixing rods disposed on the base plate and the top plate; the top plate is parallel to the base plate. The measuring mechanism includes a clamping assembly, a positioning assembly, and a calibration assembly disposed on the upper part of the top plate. The clamping assembly and the positioning assembly cooperate to position and clamp the combined cutting tool for calibration. The calibration assembly includes a center hole standard block, a height conversion plate and a guide mechanism disposed between the top plate and the base plate, and a calibrator. The height conversion plate is connected to the base plate through the guide mechanism and can slide up and down along the guide mechanism; the installation height of the height conversion plate is lower than the height of the top plate, leaving a gap between them to form a measuring space. The lower end of the center hole standard block is fixedly connected to the height conversion plate, and the upper end extends into the center through hole disposed in the center of the top plate, and can move up and down along the center through hole; in the initial state, the upper end surface of the center hole standard block is at the same horizontal plane as the upper end surface of the top plate. A center calibration hole for calibration is disposed at the center of the upper end of the center standard block; the center calibration hole is adapted to the shape of the drill bit of the center drill. An end-face calibration pad is also provided on the upper part of the top plate. The end-face calibration pad is installed on the top plate and is used to contact the end-face scraper on the combined tool to establish the scraping plane of the combined tool. The calibrator is installed on the top plate via a mounting base and is used to measure the movement distance of the height conversion plate.

[0015] In addition, the guiding mechanism includes a guide rod and a linear bearing. The guide rod connects the base plate and the height conversion plate, and the linear bearing is connected to the height conversion plate and slides on the guide rod to ensure the parallelism of the height conversion plate during movement.

[0016] In addition, the guiding mechanism also includes a reset spring, which is sleeved on the guide rod and located between the base plate and the linear bearing, for pushing the linear bearing, height conversion plate and center hole standard block to reset.

[0017] In addition, the clamping assembly includes a thread replacement block, a clamping plate, and a wing nut. The thread replacement block is mounted on the positioning block, and the thread replacement block is fitted on the clamping plate. By tightening the wing nut, the clamping plate is driven to press the combined tool downward.

[0018] In addition, the positioning component includes a positioning base and a positioning block. The positioning block is installed in the middle of the positioning base and is fixedly connected to the positioning base by a spring plunger. The positioning base is installed on the upper part of the top plate. The positioning block is provided with a positioning groove inside. The shape of the positioning groove is adapted to the shape of the tool holder. The positioning block is used to fix the combined tool and align its center hole drill with the center hole standard block.

[0019] In addition, the positioning block is set to multiple blocks, and each positioning block has a different model to adapt to the calibration of different models of combined cutting tools.

[0020] In addition, multiple height-fixing rods are provided, and the multiple height-fixing rods are of the same length and are distributed between the top plate and the bottom plate to keep the top plate parallel to the bottom plate after installation.

[0021] In addition, the thread replacement block is mounted on the positioning block, and a clamping plate is fitted on the thread replacement block. A wing nut is screwed onto the threaded rod of the thread replacement block. By tightening the wing nut, the clamping plate can be driven to press the combined tool downward.

[0022] This application also provides a calibration method for a combined cutting tool, utilizing the aforementioned calibration device. The calibration method includes the following steps: placing the combined cutting tool into a positioning block and clamping it using a clamping assembly. The center hole drill of the combined cutting tool contacts a center hole standard block, causing a height conversion plate to slide downwards along a guide mechanism. The movement distance of the height conversion plate is measured using a dial indicator, and the installation position of the center hole drill on the combined cutting tool being calibrated is adjusted based on the measurement result. The above steps are repeated until the calibrator reading meets the requirements. The center hole drill on the combined cutting tool being calibrated is then fixed, completing the calibration. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 is a schematic diagram of the overall structure of the combined cutting tool of this application;

[0025] Figure 2 is a schematic diagram of the structure of the combined cutting tool of this application, highlighting the distribution of the cutting fluid nozzles.

[0026] Figure 3 is a partial sectional view of the combined cutting tool of this application;

[0027] Figure 4 is a schematic diagram of the overall structure of the calibration device for the combined cutting tool of this application;

[0028] Figure 5 is an X-axis sectional view of the calibration device for the combined cutting tool of this application;

[0029] Figure 6 is a Y-direction sectional view of the calibration device for the combined cutting tool of this application.

[0030] The following are the labelings in the diagram: 1. Tool holder; 11. Connecting part; 12. Mounting part; 13. Mounting hole; 14. Clearance groove; 15. Mounting groove; 16. Orientation screw; 17. Length-fixing bolt; 18. Coolant nozzle; 2. Center drill; 3. End mill; 31. Positioning screw; 4. Mounting base; 41. Base plate; 42. Top plate; 421. Center through hole; 43. Height-fixing rod; 5. Measuring mechanism; 51. Clamping assembly; 511. Thread replacement block; 512. Clamping plate; 51 3. Wing nut; 52. Positioning assembly; 521. Positioning block; 5211. Positioning groove; 522. Positioning base; 523. Spring plunger; 53. Calibration assembly; 531. Center hole standard block; 5311. Center calibration hole; 532. Height conversion plate; 533. Guide mechanism; 5331. Guide rod; 5332. Linear bearing; 5333. Return spring; 534. Calibrator; 535. End face calibration pad; 536. Mounting base. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, some embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0032] In the machining industry, end milling and drilling of cylindrical workpieces traditionally employ two independent processes, resulting in low machining efficiency and poor positioning accuracy. To overcome these shortcomings, the industry has introduced combined end mills and center drills, which, while improving machining efficiency and accuracy, present new challenges. The positions of the end mill and center drill in the combined tool require precise control, especially the height difference along the Z-axis, which is crucial for machining quality. Conventional measuring tools and methods struggle to achieve the required precision, leading to difficulties in installation and adjustment. Simultaneously, the calibration of the combined tool also faces challenges. Traditional manual operations and simple measuring tools are inefficient and cannot guarantee the accuracy and consistency of calibration, necessitating urgent improvement.

[0033] The first embodiment of this application relates to a combined cutting tool, as shown in Figures 1 to 3. The combined cutting tool includes a tool holder 1, a center drill 2, and a face milling cutter 3.

[0034] The tool holder 1 is provided with a connecting part 11 and a mounting part 12. The connecting part 11 is used to connect to the machine tool post so that the entire combination tool can be stably mounted on the machine tool. The tool holder 1 has a mounting hole 13 at its center for mounting a center drill 2. At the same time, the tool holder 1 has a relief groove 14 in its circumference, and a mounting groove 15 is provided in the relief groove 14 for mounting a face milling cutter 3. The mounting part 12 is specifically used to mount the aforementioned tool.

[0035] The center drill 2 is installed at the center of the mounting part 12 through the mounting hole 13. Its main function is to machine the center hole of the product and ensure the center position accuracy of the product.

[0036] The end mill 3 is mounted in the mounting slot 15 within the relief slot 14 via positioning screws 31, and is arranged in a circular array around the center drill 2. The purpose of this design is to enable simultaneous milling of the product's end face during machining, thereby improving machining efficiency.

[0037] Specifically, in order to adjust the installation direction of the center drill 2 and ensure that it matches the processing requirements of the product, a directional screw 16 is provided on the mounting part 12. The directional screw 16 abuts against the center drill 2 through a threaded hole provided in the radial direction of the mounting part 12. By adjusting the tightness of the directional screw 16, the installation direction of the center drill 2 can be finely adjusted.

[0038] Furthermore, to adjust the length of the center drill 2 extending beyond the mounting hole 13 to accommodate the machining depth requirements of different products, a fixed-length stop bolt 17 is provided at the center of the tool holder 1. The fixed-length stop bolt 17 is threaded into the mounting hole 13, and its end abuts against one end of the center drill 2. The extension length of the center drill 2 can be adjusted by rotating the fixed-length stop bolt 17.

[0039] Finally, to improve cooling and lubrication during machining, four cutting fluid nozzles 18 are provided on the tool holder 1. The cutting fluid nozzles 18 are arranged through the tool holder 1 along its axial direction and connected to the machine tool's water circuit. In this way, during machining, the cutting fluid can be directly sprayed onto the tool and workpiece through the cutting fluid nozzles 18, achieving cooling and lubrication, thereby improving machining quality and efficiency.

[0040] Compared to existing technologies, the embodiments of this application aim to solve the problems of low efficiency and difficulty in guaranteeing accuracy caused by the separation of milling and drilling processes in the machining of cylindrical workpieces. This invention, through integrated design, combines the end mill and center drill on the same tool holder, enabling simultaneous end milling and drilling operations in a single setup, significantly improving machining efficiency and accuracy. It has the following technical effects:

[0041] 1. High-efficiency machining: This combination tool integrates a center drill and a ring array of end mills, enabling simultaneous center hole machining and end milling on the same tool. It can complete center hole machining and end milling of a product in a single setup, significantly improving machining efficiency.

[0042] 2. Precise Adjustment: The directional screws on the mounting section allow users to precisely adjust the installation direction of the center drill, ensuring that the machined center hole is aligned with the intended direction. Simultaneously, the fixed-length locking bolts allow for adjustable extension length of the center drill, further enhancing machining flexibility and precision to meet the needs of different machining depths.

[0043] 3. Cooling and lubrication: The cutting fluid nozzles on the tool holder can directly spray cutting fluid onto the machining area, effectively reducing cutting temperature, reducing tool wear, and improving machining quality and tool life.

[0044] The second embodiment of this application relates to a calibration device for a combination cutting tool, as shown in Figures 4 to 6, which mainly includes a mounting base 4 and a measuring mechanism 5.

[0045] The mounting base 4 consists of a base plate 41, a top plate 42, and height-fixing rods 43 positioned between them. The base plate 41 and the top plate 42 are arranged in parallel and connected by multiple height-fixing rods 43 of the same length, ensuring that the top plate 42 remains parallel to the base plate 41 after installation, thus providing a stable support platform for subsequent calibration work.

[0046] The measuring mechanism 5 includes multiple parts such as clamping component 51, positioning component 52, and calibration component 53, all of which are located on the upper part of the top plate 42.

[0047] The clamping assembly 51 and the positioning assembly 52 cooperate to position and clamp the combined cutting tool. Specifically, the clamping assembly 51 includes a threaded replacement block 511, a clamping plate 512, and a wing nut 513. The threaded replacement block 511 is mounted on the positioning block 521, and the clamping plate 512 is fitted onto the threaded replacement block 511. By tightening the wing nut 513, the clamping plate 512 can be driven to press the combined cutting tool downward, achieving a stable clamping effect.

[0048] The positioning assembly 52 includes a positioning base 522 and a positioning block 521. The positioning block 521 is installed in the middle of the positioning base 522 and is fixedly connected to the positioning base 522 by a spring plunger 523. The positioning base 522 is installed on the upper part of the top plate 42. The positioning block 521 has a positioning groove 5211 inside, the shape of which is adapted to the shape of the tool holder 1. The positioning block 521 can fix the assembled tool and align its center drill 2 with the center hole standard block 531, providing accurate positioning for subsequent calibration work.

[0049] It is worth noting that the positioning block 521 can be set to multiple blocks, and each positioning block 521 has a different model to adapt to the calibration requirements of different models of combined tools, thereby improving the versatility of the calibration device.

[0050] The calibration component 53 is the core part of the calibration device, including a center hole standard block 531, a height conversion plate 532, a guide mechanism 533, a calibrator 534, and an end face calibration pad 535.

[0051] The lower end of the center hole standard block 531 is fixedly connected to the height conversion plate 532, and the upper end extends into the center through hole 421 provided in the center of the top plate 42, and can move up and down along the center through hole 421. In the initial state, the upper end surface of the center hole standard block 531 is on the same horizontal plane as the upper end surface of the top plate 42. A center calibration hole 5311 is provided at the center of the upper end of the center hole standard block 531. This hole is adapted to the shape of the drill bit of the center drill 2 and is used to calibrate the center drill 2.

[0052] The height conversion plate 532 is connected to the base plate 41 via a guide mechanism 533 and can slide up and down along the guide mechanism 533. The guide mechanism 533 includes a guide rod 5331, a linear bearing 5332, and a return spring 5333. The guide rod 5331 connects the base plate 41 and the height conversion plate 532. The linear bearing 5332 is connected to the height conversion plate 532 and slides on the guide rod 5331 to ensure the parallelism of the height conversion plate 532 during movement. The return spring 5333 is sleeved on the guide rod 5331 and is located between the base plate 41 and the linear bearing 5332. It is used to push the linear bearing 5332, the height conversion plate 532, and the center hole standard block 531 to return to their original positions.

[0053] The calibrator 534 is mounted on the top plate 42 via the mounting base 536 and is used to measure the moving distance of the height conversion plate 532, thereby indirectly measuring the calibration status of the combined tool.

[0054] The end face calibration pad 535 is installed on the top plate 42 and is used to contact the end face milling cutter 3 on the combination tool to establish the milling plane of the combination tool and ensure the calibration accuracy of the end face milling cutter 3.

[0055] In use, first, the combined cutting tool is installed in the positioning block 521 of the positioning assembly 52 and clamped by the clamping assembly 51. Then, the initial position of the height conversion plate 532 is measured by the calibrator 534 and the data is recorded. Next, the center drill 2 from the combined cutting tool is inserted into the center calibration hole 5311 of the center hole standard block 531. The position of the center drill 2 is observed and adjusted by the calibrator 534 until it is perfectly aligned with the center calibration hole 5311. At the same time, the end mill 3 is calibrated using the end face calibration pad 535 to ensure that its milling plane matches the preset value. Finally, the position of the height conversion plate 532 is measured again by the calibrator 534, the extension length of the center drill 2 is calculated, and adjustments are made as needed.

[0056] Compared to existing technologies, the embodiments of this application aim to solve the problems of complex, inefficient, and difficult-to-guarantee accuracy issues in the calibration process of combined cutting tools. This device enables rapid and accurate calibration of the center drill and end mill of combined cutting tools, ensuring accuracy and stability during machining, thereby improving production efficiency and product quality. It has the following technical effects:

[0057] 1. Stable Calibration: The calibration device, through its structural design of a base plate, top plate, and height-fixing rod, ensures the parallelism of the top and bottom plates, providing a stable reference surface for the calibration of the combined cutting tools. Simultaneously, the guide mechanism ensures the parallelism of the height conversion plate during movement, while the return spring allows for rapid reset after calibration, improving the stability and reliability of the calibration.

[0058] 2. Precise Measurement: The calibration components in the measuring mechanism include a center hole standard block, a height conversion plate, and a calibrator. Through the cooperation of the center hole standard block and the height conversion plate, and the precise measurement of the calibrator, high-precision calibration of the center drill position of the combination tool is achieved. It can accurately measure the offset of the center drill of the combination tool, ensuring the accuracy of the calibration, thereby ensuring the accurate position of the center hole of the machined product and improving the overall quality of the product.

[0059] 3. Easy to operate: The clamping assembly uses a threaded replacement block, clamping plate, and wing nut design, making the clamping process of the combination tool simple and quick, reducing operational difficulty and improving work efficiency. Furthermore, the combined design of the clamping and positioning components allows for convenient and rapid positioning and clamping of the combination tool, simplifying the calibration process and improving work efficiency.

[0060] 4. High adaptability: The positioning component has multiple positioning blocks, each with a different model, which can be adapted to different models of combined cutting tools for calibration, greatly enhancing the versatility and flexibility of the calibration device.

[0061] The third embodiment of this application relates to a method of using a calibration device, specifically including the following steps:

[0062] First, ensure that the calibration device is correctly installed and debugged, including the stability of the mounting base 4 and the normal functioning of all components of the measuring mechanism 5. Then, calibrate the combined cutting tool according to the following steps:

[0063] Step 1: Assembly and clamping of the combined cutting tools

[0064] Place the combined tool to be calibrated into the positioning block 521 of the positioning assembly 52. ​​The positioning groove 5211 inside the positioning block 521 matches the shape of the tool holder 1 of the combined tool, ensuring that the combined tool can be stably placed in the positioning block 521. Clamp the combined tool using the clamping assembly 51. Specifically, rotate the wing nut 513 to firmly fix the combined tool onto the positioning block 521 through the threaded replacement block 511 and the clamping plate 512. Ensure that the clamping force is moderate to avoid excessive tightness causing tool deformation or excessive looseness causing inaccurate calibration.

[0065] Step 2: Align the center hole drill with the center hole standard block.

[0066] Adjust the position of the combined cutting tool so that its center hole drill 2 is aligned with the center calibration hole 5311 of the center hole standard block 531. At this time, the center hole drill 2 will be inserted into the center calibration hole 5311, and will drive the height conversion plate 532 to slide downward along the guide mechanism 533. The guide rod 5331 and the linear bearing 5332 of the guide mechanism 533 ensure that the height conversion plate 532 remains parallel during the sliding process, and the return spring 5333 is used to push the height conversion plate 532 to return to its original position after calibration.

[0067] Step 3: Measurement and Adjustment

[0068] The travel distance of the height conversion plate 532 is measured using a calibrator 534. This distance reflects the deviation of the center hole drill 2 from its ideal position. Based on the measurement results of the calibrator 534, the mounting position of the center hole drill 2 on the calibrated combination tool is adjusted. The extension length of the center hole drill 2 can be changed by adjusting the length-fixing bolt 17 on the tool holder 1, or the mounting direction of the center hole drill 2 can be changed by adjusting the orientation screw 16.

[0069] Repeat the above measurement and adjustment steps until the reading of the calibrator 534 meets the preset calibration requirements. This usually means that the center hole drill 2 and the center calibration hole 5311 of the center hole standard block 531 are perfectly aligned, and the movement distance of the height conversion plate 532 is within the allowable error range.

[0070] Step 4: Fix and complete calibration

[0071] Once the reading from calibrator 534 meets the requirements, use an appropriate tool (such as a screwdriver) to secure the center hole drill 2 on the calibrated tool set. Ensure that the center hole drill 2 will not loosen or change position during subsequent use. After calibration is complete, loosen the clamping assembly 51, remove the calibrated tool set, and prepare for the next round of calibration or for production use.

[0072] Compared with the prior art, the embodiments of this application have the following technical effects:

[0073] 1. High-efficiency calibration: The combined cutting tool is positioned and clamped using a calibration device, and then the movement distance of the height conversion plate is measured using a calibrator. Based on the measurement results, the installation position of the center drill is quickly adjusted, achieving a highly efficient and accurate calibration process. This method enables rapid calibration of the combined cutting tool through simple steps, greatly improving calibration efficiency and reducing production preparation time.

[0074] 2. Ensuring accuracy: Through repeated measurements and adjustments until the calibrator readings meet the requirements, the calibration accuracy of the combined cutting tool is ensured. Due to the use of a high-precision calibration device, the calibrated combined cutting tool has high machining accuracy and stability. This method can ensure that the center drill position of the combined cutting tool reaches the expected accuracy requirements and improve the quality of the machined parts.

[0075] 3. Easy to implement: The calibration method has clear steps, is easy to operate, easy to master and repeat, requires no complicated equipment or skills, and is suitable for various production environments and operators, providing a reliable guarantee for the calibration of combined tools in mass production.

[0076] 4. Wide applicability: This method is applicable to various types of combination cutting tools, improving calibration efficiency and machining accuracy. The calibration device used in this method has a simple structure, is easy to operate, and can be implemented without complex professional skills, thus reducing calibration costs.

[0077] In summary, this application provides a comprehensive combined cutting tool and its calibration device and method. Through the design of the combined cutting tool structure and the precise calibration device, efficient and accurate calibration of the cutting tool is achieved. The combined cutting tool integrates a center drill and a face milling cutter. By adjusting the orientation screw and the length-fixing bolt, the installation direction and extension length of the cutting tool can be precisely controlled to adapt to different machining requirements. The calibration device utilizes a high-precision center hole standard block, a height conversion plate, a guiding mechanism, and a calibrator. Through the precise cooperation of the clamping and positioning components, rapid positioning and calibration of the combined cutting tool are achieved. Furthermore, the calibration method is simple and intuitive. Through multiple adjustments and measurements, the calibration accuracy is ensured to meet the requirements. The combined cutting tool, its calibration device, and the calibration method of this invention demonstrate significant technical effects in improving machining efficiency, ensuring machining accuracy, enhancing equipment versatility, and simplifying operation procedures.

[0078] Those skilled in the art will understand that the above embodiments are specific embodiments for implementing this application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of this application.

Claims

1. A combination cutting tool, wherein, include: The tool holder (1) is provided with a connecting part (11) and a mounting part (12). The connecting part (11) is connected to the machine tool tool holder. The tool holder (1) has a mounting hole (13) in the center and a relief groove (14) in the circumferential direction. The mounting part (12) is used to install the tool. The center drill (2) is installed in the center of the mounting part (12) through the mounting hole (13) and is used to process the center hole of the product. The end mill (3) is installed in the mounting groove (15) in the relief groove (14) by the positioning screw (31) and is distributed in a ring array around the center drill (2) for milling the end face of the product.

2. The combined cutting tool as described in claim 1, wherein, The mounting part (12) is provided with a directional screw (16), which abuts against the center drill (2) through a threaded hole provided in the radial direction of the mounting part (12) and is used to adjust the mounting direction of the center drill (2).

3. The combined cutting tool as described in claim 1, wherein, The tool holder (1) is provided with a fixed length stop bolt (17) at the center, which is threaded to the mounting hole (13) and its end abuts against one end of the center drill (2) to adjust the length of the center drill (2) extending out of the mounting hole (13).

4. The combined cutting tool as described in claim 1 or 3, wherein, The tool holder (1) is also provided with a cutting fluid nozzle (18), which is provided through the tool holder (1) along the axial direction, and at least one nozzle is provided and connected to the machine tool water circuit.

5. A calibration device for a combination cutting tool, wherein, The system includes a mounting base (4) and a measuring mechanism (5); the mounting base (4) includes a base plate (41), a top plate (42), and a height-fixing rod (43) disposed on the base plate (41) and the top plate (42); the top plate (42) is arranged parallel to the base plate (41); the measuring mechanism (5) includes a clamping assembly (51), a positioning assembly (52), and a calibration assembly (53) disposed on the upper part of the top plate (42); the clamping assembly (51) and the positioning assembly (52) cooperate with each other to form a combination. The cutting tool is positioned and clamped to calibrate the combined cutting tool; the calibration assembly (53) includes a center hole standard block (531), a height conversion plate (532) and a guide mechanism (533) between the top plate (42) and the bottom plate (41), and a calibrator (534); the height conversion plate (532) is connected to the bottom plate (41) through the guide mechanism (533) and can slide up and down along the guide mechanism (533); the height conversion plate (532) is installed at a height lower than that of the top plate (42). The height is such that a gap is left between it and the top plate (42) to form a measurement space; the lower end of the center hole standard block (531) is fixedly connected to the height conversion plate (532), and the upper end extends into the center through hole (421) set in the center of the top plate (42), and can move up and down along the center through hole (421); in the initial state, the upper end surface of the center hole standard block (531) and the upper end surface of the top plate (42) are on the same horizontal plane; the center of the upper end of the center standard block (531) is provided with a center calibration for calibration. A central calibration hole (5311) is provided; the central calibration hole (5311) is adapted to the shape of the drill bit of the central drill (2); an end face calibration pad (535) is also provided on the upper part of the top plate (42), the end face calibration pad (535) is installed on the top plate (42) and is used to contact the end face scraper on the combined tool to establish the scraping plane of the combined tool; the calibrator (534) is installed on the top plate (42) through the mounting base (536) and is used to measure the moving distance of the height conversion plate (532).

6. The calibration device for the combined cutting tool as described in claim 5, wherein, The guiding mechanism (533) includes a guide rod (5331) and a linear bearing (5332). The guide rod (5331) connects the base plate (41) and the height conversion plate (532). The linear bearing (5332) is connected to the height conversion plate (532) and slides on the guide rod (5331) to ensure the parallelism of the height conversion plate (532) during movement.

7. [Amended according to Rule 26, 21.10.2025] The calibration device for the combined cutting tool as described in claim 6, wherein, The guide mechanism (533) also includes a reset spring (5333), which is sleeved on the guide rod (5331) and located between the base plate (41) and the linear bearing (5332) to push the linear bearing (5332), the height conversion plate (532) and the center hole standard block (531) to reset.

8. The calibration device for the combined cutting tool as described in claim 5, wherein, The clamping assembly (51) includes a thread replacement block (511), a clamping plate (512), and a wing nut (513). The thread replacement block (511) is mounted on the positioning block (521), and the thread replacement block (511) is fitted on the clamping plate (512). By tightening the wing nut (513), the clamping plate (512) is driven to press the combined tool downward.

9. The calibration device for the combined cutting tool as described in claim 5, wherein, The positioning component (52) includes a positioning base (522) and a positioning block (521). The positioning block (521) is installed in the middle of the positioning base (522) and is fixedly connected to the positioning base (522) by a spring plunger (523). The positioning base (522) is installed on the upper part of the top plate (42). The positioning block (521) has a positioning groove (5211) inside. The shape of the positioning groove (5211) is adapted to the shape of the tool holder (1). The positioning block (521) is used to fix the combined tool and align its center hole drill (2) with the center hole standard block (531).

10. The calibration device for the combined cutting tool as described in claim 9, wherein, The positioning block (521) is configured as multiple blocks, and each positioning block (521) has a different model to adapt to the calibration of different models of combined cutting tools.

11. The calibration device for the combined cutting tool as described in claim 5, wherein, The height-fixing rods (43) are configured as multiple rods of the same length, distributed between the top plate (42) and the bottom plate (41) to keep the top plate (42) parallel to the bottom plate (41) after installation.

12. The calibration device for the combined cutting tool as described in claim 8, wherein, The thread replacement block (511) is installed on the positioning block (521). A clamping plate (512) is fitted on the thread replacement block (511). A wing nut (513) is screwed onto the threaded rod on the thread replacement block (511). By tightening the wing nut (513), the clamping plate (512) can be driven to press the combined tool downward.

13. A calibration method for a combined cutting tool, employing the calibration apparatus for a combined cutting tool as described in any one of claims 5 to 12, wherein, The calibration method includes the following steps: placing the combined tool into the positioning block (521) and clamping the combined tool with the clamping assembly (51); the center hole drill (2) of the combined tool contacts the center hole standard block (531) and drives the height conversion plate (532) to slide downward along the guide mechanism (533); measuring the moving distance of the height conversion plate (532) with the calibrator (534) and adjusting the installation position of the center hole drill (2) on the combined tool to be calibrated according to the measurement result; repeating the above steps until the reading of the calibrator (534) meets the requirements, fixing the center hole drill (2) on the combined tool to be calibrated, and completing the calibration.

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