Combined tool, calibration device and calibration method

Abstract

The present invention relates to the field of machining technology, and specifically discloses a combination tool, including a tool holder, a center drill and an end milling cutter, wherein the center drill is installed at the center of the tool holder, and the end milling cutters are distributed around the center drill and installed in a clearance groove. The calibration device includes a mounting base and a measuring mechanism, and the measuring mechanism is provided with a clamping assembly, a positioning assembly and a calibration assembly to position and clamp the combination tool, and calibrate it through a center hole standard block, a height conversion plate, a guide mechanism and a calibrator. At the same time, an end face calibration pad is also provided to establish the scraping plane of the combination tool. The calibration method includes placing the combination tool into the positioning block and pressing it, driving the height conversion plate to slide by the contact between the center drill and the center hole standard block, measuring the moving distance and adjusting the installation position of the center drill by the calibrator, and fixing the center drill to complete the calibration. The combination tool, calibration device and method have the advantages of simple structure, accurate calibration, and easy operation, and are suitable for the calibration of various types of combination tools.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, in particular to a combined tool, and also to a calibration device for the combined tool and a calibration method for the calibration device. Background Art

[0002] Machining cylindrical workpieces is a common and critical process in the machining industry. During machining, these workpieces often require precise milling and drilling of their end faces to meet the positioning and machining requirements of subsequent operations. Traditionally, this process is accomplished in two separate steps: first, milling the workpiece end face with a milling cutter to achieve the required flatness; then, using a center drill, drilling a center hole into the milled surface to serve as a reference for subsequent machining.

[0003] However, this traditional machining method has numerous drawbacks. 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, because the two processes are performed separately, it is difficult to ensure the positional accuracy and coaxiality between the milling plane and the center hole, which directly affects the quality and precision of subsequent machining.

[0004] To overcome these shortcomings, the industry began exploring the possibility of integrating milling and drilling into a single process. This led to the development of a combination tool that combines a face milling cutter and a center drill. By ingeniously integrating the milling cutter and center drill into the same tool head, this tool enables simultaneous milling and drilling operations in a single setup, significantly improving machining efficiency and precision. However, the center drill suffers from inconvenient adjustment and limited precision positioning.

[0005] This combination tool also presents new challenges in practical applications. Because the position of the milling cutter and center drill on the cutter head must be precisely controlled to ensure that the machined surfaces 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 often very small, making it difficult to achieve the required accuracy using conventional measuring tools and methods, making tool installation and adjustment extremely difficult.

[0006] Furthermore, to ensure the machining accuracy and stability of combination tools, they require regular calibration. Traditional calibration methods often rely on manual labor and simple measuring tools, which are not only inefficient but also difficult to ensure accuracy and consistency. Therefore, the development of a device and method specifically for combination tool calibration is particularly important. Summary of the Invention

[0007] The first objective of the present invention is to provide a combined tool that addresses the inefficiency and difficulty ensuring precision caused by the separation of milling and drilling processes in the prior art for machining cylindrical workpieces. Through an integrated design, the present invention combines a face milling cutter and a center drill into the same toolholder, enabling simultaneous milling and drilling operations in a single clamping operation, significantly improving machining efficiency and precision.

[0008] In order to solve the above technical problems, the present invention provides a combined tool, comprising:

[0009] The tool handle is provided with a connecting portion and a mounting portion. The connecting portion is connected to the machine tool tool holder. A mounting hole is provided in the center of the tool handle and a clearance groove is opened in the circumference. The mounting portion is used for mounting the tool.

[0010] The center drill is installed in the center of the mounting part through the mounting hole and is used to process the center hole of the product.

[0011] The end milling cutter is installed in the mounting groove set in the clearance groove through a positioning screw, and the circular array is distributed around the center drill for milling the end face of the product.

[0012] In addition to the above technical features, this application also makes improvements in the following aspects:

[0013] In some embodiments, a directional screw is provided on the mounting portion, and the directional screw abuts against the center drill through a threaded hole provided in a radial direction of the mounting portion, so as to adjust the mounting direction of the center drill.

[0014] In some embodiments, a fixed-length stop bolt is provided at the center of the tool handle, which is threadedly connected to the mounting hole, and the end of the stop bolt abuts against one end of the center drill for adjusting the length of the center drill extending out of the mounting hole.

[0015] In some embodiments, a cutting fluid nozzle is further provided on the tool handle, and the cutting fluid nozzle is provided along the axial direction of the tool handle, with at least one nozzle provided, and connected to the water channel of the machine tool.

[0016] A second objective of the present invention is to provide a calibration device for a combination tool to address the existing challenges of complex, inefficient, and difficult-to-guaranteed calibration. This device enables rapid and accurate calibration of the center drill and face milling cutter in a combination tool, ensuring precision and stability during machining, thereby improving production efficiency and product quality.

[0017] The present invention provides a calibration device for a combined tool, comprising a mounting base and a measuring mechanism.

[0018] The mounting base includes a bottom plate, a top plate, and height-fixing rods arranged on the bottom plate and the top plate; the top plate is arranged parallel to the bottom plate.

[0019] The measuring mechanism includes a clamping assembly, a positioning assembly, and a calibration assembly arranged on the upper portion of the top plate.

[0020] The clamping assembly and the positioning assembly cooperate with each other to position and clamp the combined tool so as to calibrate the combined tool.

[0021] The calibration component includes a center hole standard block, a height conversion plate and a guide mechanism arranged between a top plate and a bottom plate, and a calibrator.

[0022] The height conversion plate is connected to the bottom plate through a 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, and a gap is left between the height conversion plate and the top plate to form a measuring space.

[0023] 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 set 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 and the upper end surface of the top plate are on the same horizontal plane.

[0024] A center calibration hole for calibration is provided at the center of the upper end portion of the center standard block; the center calibration hole is adapted to the shape of the drill bit of the center drill.

[0025] An end face calibration pad is also provided on the upper portion of the top plate. The end face calibration pad is mounted on the top plate and is used to contact the end face scraping cutter on the combined tool to establish the scraping plane of the combined tool.

[0026] The calibrator is mounted on the top plate via a mounting base and is used to measure the moving distance of the height conversion plate.

[0027] In some embodiments, the guide mechanism includes a guide light rod and a linear bearing, the guide light rod is connected to the base plate and the height conversion plate, the linear bearing is connected to the height conversion plate, and slides on the guide light rod to ensure the parallelism of the height conversion plate during movement.

[0028] In some embodiments, the guide mechanism further includes a reset spring, which is sleeved on the guide light rod and disposed between the base plate and the linear bearing, and is used to push the linear bearing, the height conversion plate and the center hole standard block to reset.

[0029] In some embodiments, the clamping assembly includes a thread replacement block, a splint and a butterfly nut. The thread replacement block is installed on the positioning block, and the splint is sleeved with the thread replacement block. By tightening the butterfly nut, the splint is driven downward to press the combined tool.

[0030] In some embodiments, the positioning assembly 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 through a spring plunger; the positioning base is installed on the upper part of the top plate, and a positioning groove is provided inside the positioning block, the shape of the positioning groove is adapted to the shape of the tool handle, and the positioning block is used to fix the combination tool and align its center hole drill with the center hole standard block.

[0031] In some embodiments, the positioning blocks are provided in a plurality of blocks, and each positioning block is of a different model to adapt to the calibration of different models of combination tools.

[0032] In some embodiments, the height-fixing rods are provided in a plurality, and the plurality of height-fixing rods have 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.

[0033] In some embodiments, the thread replacement block is installed on the positioning block, a splint is sleeved on the thread replacement block, and a butterfly nut is screwed on the threaded rod on the thread replacement block. By tightening the butterfly nut, the splint can be driven downward to press the combined tool.

[0034] A third object of the present invention is to provide a calibration method for a combined tool, using the above-mentioned calibration device for the combined tool, the calibration method comprising the following steps:

[0035] Place the combined tool into the positioning block and clamp the combined tool with the clamping assembly.

[0036] The center hole drill of the combined tool contacts the center hole standard block and drives the height conversion plate to slide downward along the guide mechanism.

[0037] The moving distance of the height conversion plate is measured by a dial indicator, and the installation position of the center hole drill on the calibrated combined tool is adjusted according to the measurement result.

[0038] Repeat the above steps until the calibrator's reading meets the requirements, fix the center hole drill on the calibrated combination tool, and complete the calibration.

[0039] By adopting the above technical solution, the present invention has at least one of the following beneficial effects:

[0040] (1) Technical effect of combined tool:

[0041] 1. Efficient machining: This combination tool integrates a center drill and a face milling cutter distributed in a circular array, enabling simultaneous center hole machining and face milling on the same tool. This enables center hole machining and face milling of the product to be completed in a single clamping, significantly improving machining efficiency.

[0042] 2. Precise Adjustment: A directional screw on the mounting assembly allows the user to precisely adjust the center drill's orientation, ensuring the center hole is aligned with the desired orientation. Furthermore, a fixed-length stop bolt allows for adjustable center drill extension, further enhancing machining flexibility and precision to meet varying machining depth requirements.

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

[0044] (2) Technical effects of the calibration device for combined tools:

[0045] 1. Stable Calibration: The calibration device's structural design of the base plate, top plate, and height-fixing rod ensures parallelism between the top and bottom plates, providing a stable reference surface for calibration of the combination tool. Furthermore, the guide mechanism ensures the parallelism of the height conversion plate during movement, and the return spring allows for rapid reset after calibration, improving calibration stability and reliability.

[0046] 2. Accurate 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, as well as the precise measurement of the calibrator, high-precision calibration of the center drill position of the combination tool is achieved. The offset of the center drill of the combination tool can be accurately measured to ensure the accuracy of the calibration, thereby ensuring the accurate position of the center hole of the processed product and improving the overall quality of the product.

[0047] 3. Easy to operate: The clamping assembly uses a threaded replacement block, clamping plate, and butterfly nut design, making the clamping process of the combination tool simple and quick, reducing the difficulty of operation and improving work efficiency. In addition, the combined design of the clamping assembly and positioning assembly allows the combination tool to be positioned and clamped conveniently and quickly, simplifying the calibration process and improving work efficiency.

[0048] 4. Strong adaptability: The positioning blocks in the positioning assembly are set to multiple blocks, and each positioning block has a different model, which can be adapted to different types of combination tools for calibration, greatly enhancing the versatility and flexibility of the calibration device.

[0049] (3) Technical effect of the calibration method of the combined tool:

[0050] 1. Efficient calibration: The combination tool is positioned and clamped using a calibration device. The height conversion plate's travel distance is then measured using a calibrator. The center drill's installation position is quickly adjusted based on the measurement results, achieving efficient and accurate calibration. This method enables rapid calibration of the combination tool through simple steps, significantly improving calibration efficiency and reducing production setup time.

[0051] 2. Ensure accuracy: Through repeated measurement and adjustment until the reading of the calibrator meets the requirements, the calibration accuracy of the combination tool is ensured. Due to the use of a high-precision calibration device, the calibrated combination tool is ensured to have a high degree of processing accuracy and stability. This method can ensure that the center drill position of the combination tool meets the expected accuracy requirements and improve the quality of the processed parts.

[0052] 3. Easy to implement: The calibration method has clear steps, simple operation, easy to master and repeat, does not require complex equipment and skills, is suitable for various production environments and operators, and provides reliable guarantee for the calibration of combination tools in mass production.

[0053] 4. Wide applicability: This method is applicable to various types of combination tools, improving calibration efficiency and processing accuracy. The calibration device used in this method is simple in structure and easy to operate, requiring no complex professional skills to implement, thus reducing calibration costs.

[0054] In summary, the present invention provides a comprehensive combination tool and its calibration device and method. Through the design of the combination tool structure and the precise calibration device, efficient and accurate calibration of the tool is achieved. The combination tool integrates a center drill and an end mill. Through the adjustment of the directional screw and the fixed-length stop bolt, the installation direction and extension length of the tool can be accurately controlled to adapt to different processing requirements. The calibration device utilizes a high-precision center hole standard block, a height conversion plate, a guide mechanism and a calibrator, and through the precise matching of the clamping assembly and the positioning assembly, it achieves rapid positioning and calibration of the combination tool. In addition, the calibration method is simple and intuitive, and through multiple adjustments and measurements, it is ensured that the calibration accuracy meets the requirements. The combination tool and its calibration device and calibration method of the present invention have shown significant technical effects in improving processing efficiency, ensuring processing accuracy, enhancing equipment versatility and simplifying operating procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0056] Figure 1 This is a schematic diagram of the overall structure of the combined tool of the present invention;

[0057] Figure 2 This is a structural diagram of the combined tool of the present invention, focusing on the distribution of cutting fluid nozzles;

[0058] Figure 3 A partial cross-sectional view of the combined tool of the present invention;

[0059] Figure 4Schematic diagram of the overall structure of the calibration device for the combined tool of the present invention;

[0060] Figure 5 It is an X-axis cross-sectional view of the calibration device of the combined tool of the present invention;

[0061] Figure 6 It is a Y-section view of the calibration device of the combined tool of the present invention.

[0062] The numbers in the figure are as follows:

[0063] 1. Tool handle; 11. Connecting part; 12. Mounting part; 13. Mounting hole; 14. Clearance groove; 15. Mounting slot; 16. Directing screw; 17. Fixed-length stop bolt; 18. Cutting fluid nozzle;

[0064] 2. Center drill;

[0065] 3. Face milling cutter; 31. Positioning screw;

[0066] 4. Mounting base; 41. Bottom plate; 42. Top plate; 421. Center through hole; 43. Height setting rod;

[0067] 5. Measuring mechanism;

[0068] 51. Clamping assembly; 511. Thread replacement block; 512. Clamping plate; 513. Butterfly nut;

[0069] 52. Positioning assembly; 521. Positioning block; 5211. Positioning groove; 522. Positioning base; 523. Spring plunger;

[0070] 53. Calibration components;

[0071] 531, center hole standard block; 5311, center calibration hole;

[0072] 532, height conversion board;

[0073] 533, guide mechanism; 5331, guide light rod; 5332, linear bearing; 5333, return spring;

[0074] 534. Calibrator;

[0075] 535, end face calibration pad;

[0076] 536. Mounting seat. DETAILED DESCRIPTION

[0077] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present invention and its application or use. The present invention can be implemented in other different forms and is not limited to the embodiments described herein.

[0078] It should be noted that persons of ordinary skill in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments unless there is a conflict. Unless otherwise defined, technical or scientific terms used in this invention shall have the same meaning as those generally understood by persons of ordinary skill in the art to which this invention belongs.

[0079] The terms "a," "an," "an," "the," and similar expressions used in this disclosure do not limit quantity and may refer to the singular or plural. The terms "include," "comprises," "includes," "has," and any variations thereof used in this disclosure are intended to cover a non-exclusive inclusion. The terms "first," "second," "third," and similar expressions used in this disclosure are intended solely to distinguish similar items and do not imply a specific ordering of the items.

[0080] This embodiment is based on the fact that in the machining industry, the end milling and drilling of cylindrical workpieces traditionally adopt two independent processes, which have the problems of low machining efficiency and poor positioning accuracy. In order to overcome these shortcomings, the industry has introduced a combination tool that integrates an end mill and a center drill. Although it improves machining efficiency and accuracy, it faces new challenges. The position of the milling cutter and the center drill in the combination tool needs to be precisely controlled, especially the height difference in the Z-axis direction, which is crucial to the machining quality. Conventional measuring tools and methods are difficult to achieve the required accuracy, resulting in difficulties in installation and adjustment. At the same time, the calibration of the combination tool also faces challenges. Traditional manual operations and simple measuring tools are inefficient and it is difficult to ensure the accuracy and consistency of calibration, which is in urgent need of improvement.

[0081] Based on the above problems, the present invention proposes a combined tool, such as Figures 1 to 3 As shown, the combined tool comprises a tool holder 1 , a center drill 2 and an end mill 3 .

[0082] The tool holder 1 is provided with a connecting portion 11 and a mounting portion 12. The connecting portion 11 is used to connect to the machine tool tool holder, allowing the entire combination tool to be stably mounted on the machine tool. A mounting hole 13 is provided in the center of the tool holder 1 for mounting the center drill 2. Furthermore, a clearance groove 14 is provided around the circumference of the tool holder 1, within which a mounting slot 15 is provided for mounting the face milling cutter 3. The mounting portion 12 is specifically used to mount the aforementioned tool.

[0083] The center drill 2 is installed at the center position of the mounting portion 12 through the mounting hole 13. Its main function is to process the center hole of the product to ensure the center position accuracy of the product.

[0084] The end milling cutter 3 is installed in the mounting groove 15 in the clearance groove 14 by the positioning screw 31, and the annular array is distributed around the center drill 2. The purpose of this design is to be able to mill the end face of the product at the same time during the processing, thereby improving processing efficiency.

[0085] Furthermore, in order to adjust the installation direction of the center drill 2 to ensure that it matches the processing requirements of the product, a directional screw 16 is provided on the mounting portion 12. The directional screw 16 abuts against the center drill 2 through a threaded hole provided in the radial direction of the mounting portion 12. By adjusting the tightening degree of the directional screw 16, the installation direction of the center drill 2 can be fine-tuned.

[0086] Furthermore, to adjust the length of the center drill 2 extending from the mounting hole 13 to accommodate the machining depth requirements of different products, a fixed-length stop bolt 17 is located in the center of the tool holder 1. This stop bolt 17 is threaded into the mounting hole 13, and its end abuts against one end of the center drill 2. By rotating this stop bolt 17, the extension length of the center drill 2 can be adjusted.

[0087] Finally, to improve cooling and lubrication during machining, the toolholder 1 is equipped with four cutting fluid nozzles 18. These nozzles extend axially through the toolholder 1 and connect to the machine tool's water circuits. During machining, cutting fluid can be sprayed directly onto the tool and workpiece through these nozzles, providing cooling and lubrication, improving machining quality and efficiency.

[0088] In addition, the present application also discloses a calibration device for a combined tool, such as Figures 4 to 6 As shown, it mainly includes a mounting base 4 and a measuring mechanism 5.

[0089] Mounting base 4 consists of a bottom plate 41, a top plate 42, and fixed height rods 43 disposed between them. Bottom plate 41 and top plate 42 are arranged parallel to each other and connected by multiple fixed height rods 43 of the same length. This ensures that top plate 42 remains parallel to bottom plate 41 after installation, providing a stable support platform for subsequent calibration work.

[0090] The measuring mechanism 5 includes a clamping assembly 51 , a positioning assembly 52 , a calibration assembly 53 and other parts, all of which are arranged on the upper part of the top plate 42 .

[0091] The clamping assembly 51 and the positioning assembly 52 cooperate to position and clamp the tool assembly. Specifically, the clamping assembly 51 comprises a thread replacement block 511, a clamping plate 512, and a butterfly nut 513. The thread replacement block 511 is mounted on the positioning block 521, and the clamping plate 512 is inserted into the thread replacement block 511. Tightening the butterfly nut 513 drives the clamping plate 512 downward to clamp the tool assembly, achieving a stable clamping effect.

[0092] The positioning assembly 52 includes a positioning base 522 and a positioning block 521. The positioning block 521 is mounted in the middle of the positioning base 522 and is fixedly connected to the positioning base 522 via a spring plunger 523. The positioning base 522 is mounted on the upper portion of the top plate 42. A positioning groove 5211 is provided inside the positioning block 521, the shape of which matches the shape of the tool handle 1. The positioning block 521 can be used to fix the combined tool and align its center drill 2 with the center hole standard block 531, providing accurate positioning for subsequent calibration work.

[0093] 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 combination tools, thereby improving the versatility of the calibration device.

[0094] The calibration assembly 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 .

[0095] The lower end of the center hole standard block 531 is fixedly connected to the height conversion plate 532, while the upper end extends into the central through hole 421 provided at the center of the top plate 42 and can move up and down along the central through hole 421. Initially, the upper end surface of the center hole standard block 531 is flush with 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 matches the drill bit shape of the center drill 2 and is used for calibration of the center drill 2.

[0096] 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 light rod 5331, a linear bearing 5332, and a return spring 5333. The guide light 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 light rod 5331 to ensure the parallelism of the height conversion plate 532 during movement. The return spring 5333 is mounted on the guide light rod 5331 and is disposed 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 into their original position.

[0097] 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.

[0098] 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 combined tool, establish the scraping plane of the combined tool, and ensure the calibration accuracy of the end face milling cutter 3.

[0099] When in use, first install the combined tool in the positioning block 521 of the positioning assembly 52 and clamp it by the clamping assembly 51. Then, measure the initial position of the height conversion plate 532 by the calibrator 534 and record the data. Next, insert the center drill 2 in the combined tool into the center calibration hole 5311 of the center hole standard block 531, and observe and adjust the position of the center drill 2 by the calibrator 534 until it is completely aligned with the center calibration hole 5311. At the same time, use the end face calibration pad 535 to calibrate the end mill 3 to ensure that its scraping plane matches the preset value. Finally, measure the position of the height conversion plate 532 again by the calibrator 534, calculate the protruding length of the center drill 2, and adjust it as needed.

[0100] In summary, the combination tool calibration device of the present invention, through its ingenious design, achieves precise calibration of the combination tool. The combined clamping and positioning assemblies provide stable fixation of the combination tool. The precise measurement and calibration of the calibration assembly ensures that the accuracy and position of the center drill and face milling cutter in the combination tool meet machining requirements. This calibration device boasts a simple structure, easy operation, and high calibration accuracy, making it suitable for calibrating a wide range of combination tool models.

[0101] This application also discloses a method for using the calibration device, which specifically includes the following steps:

[0102] First, ensure that the calibration device has been correctly installed and debugged, including the stability of the mounting base 4 and the normal function of the components of the measuring mechanism 5. Then, follow the steps below to calibrate the combination tool:

[0103] Step 1: Install and clamp the combined tool

[0104] The combined tool to be calibrated is placed in the positioning block 521 of the positioning assembly 52. ​​The positioning groove 5211 inside the positioning block 521 matches the shape of the tool handle 1 of the combined tool, ensuring that the combined tool can be stably placed in the positioning block 521.

[0105] Use the clamping assembly 51 to clamp the tool assembly. Specifically, rotate the butterfly nut 513 to secure the tool assembly to the positioning block 521 via the threaded replacement block 511 and clamping plate 512. Ensure the clamping force is moderate to avoid excessive tightening that may cause tool deformation or excessive loosening that may cause inaccurate calibration.

[0106] Step 2: Align the center hole drill with the center hole standard block

[0107] Adjust the position of the combined tool so that the 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 is inserted into the center calibration hole 5311 and drives the height conversion plate 532 to slide downward along the guide mechanism 533.

[0108] The guide light rod 5331 and the linear bearing 5332 of the guide mechanism 533 ensure that the height conversion plate 532 maintains parallelism 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 is completed.

[0109] Step 3: Measure and adjust

[0110] The moving distance of the height conversion plate 532 is measured using a calibration gauge 534. This distance reflects the deviation of the center hole drill 2 from its ideal position.

[0111] The installation position of the center drill 2 on the calibrated combination tool is adjusted based on the measurement results of the calibrator 534. The extension length of the center drill 2 can be changed by adjusting the fixed-length stop bolt 17 on the tool holder 1, or the installation direction of the center drill 2 can be changed by adjusting the directional screw 16.

[0112] 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 is fully aligned with the center calibration hole 5311 of the center hole standard block 531, and the movement distance of the height conversion plate 532 is within the allowable error range.

[0113] Step 4: Fix and complete calibration

[0114] When the reading of the calibrator 534 meets the requirements, use an appropriate tool (such as a screwdriver) to fix the center hole drill 2 on the calibrated combination tool to ensure that the center hole drill 2 will not loosen or change position during subsequent use.

[0115] After the calibration is completed, the clamping assembly 51 is released, the calibrated combined tool is taken out, and it is prepared for the next round of calibration or put into production use.

[0116] In summary, this embodiment provides a simple and effective method for calibrating a combination tool. By utilizing the positioning assembly, clamping assembly, and calibration assembly in a calibration device, it achieves precise calibration of the center hole drill in a combination tool. This method not only improves calibration accuracy and efficiency but is also applicable to combination tools of varying models and specifications, demonstrating its broad applicability and practicality.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0118] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A calibration device for a combination tool, used for calibrating a combination tool, the combination tool comprising: A tool handle (1) is provided with a connecting portion (11) and a mounting portion (12), wherein the connecting portion (11) is connected to a machine tool tool holder, a mounting hole (13) is provided at the center of the tool handle (1), and a clearance groove (14) is provided in the circumference thereof, and the mounting portion (12) is used for mounting a tool; A center drill (2) is mounted at the center of the mounting portion (12) through the mounting hole (13) and is used to process the center hole of the product; An end milling cutter (3) is mounted in a mounting groove (15) provided in a clearance groove (14) via a positioning screw (31), and is distributed in a circular array around a center drill (2) for milling the end face of a product; the cutter is characterized in that it includes a mounting base (4) and a measuring mechanism (5); The mounting base (4) comprises a bottom plate (41), a top plate (42), and a height-fixing rod (43) arranged on the bottom plate (41) and the top plate (42); the top plate (42) is arranged parallel to the bottom plate (41); The measuring mechanism (5) includes a clamping assembly (51), a positioning assembly (52), and a calibration assembly (53) arranged on the upper portion of the top plate (42); The clamping assembly (51) and the positioning assembly (52) cooperate with each other to position and clamp the combined tool, so as to calibrate the combined tool; The calibration assembly (53) includes a center hole standard block (531), a height conversion plate (532) and a guide mechanism (533) disposed between the top plate (42) and the bottom plate (41), and a calibration instrument (534); The height conversion plate (532) is connected to the bottom plate (41) via a 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 the height of the top plate (42), and a gap is left between the height conversion plate (532) 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) 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) and the upper end surface of the top plate (42) are on the same horizontal plane; A center calibration hole (5311) for calibration is provided at the center of the upper end of the center hole standard block (531); the center calibration hole (5311) is adapted to the drill bit shape of the center drill (2); An end face calibration pad (535) is also provided on the top of the top plate (42). The end face calibration pad (535) is mounted on the top plate (42) and is used to contact the end face milling cutter (3) on the combined tool to establish the scraping and milling plane of the combined tool. The calibrator (534) is mounted on the top plate (42) via a mounting base (536) and is used to measure the moving distance of the height conversion plate (532).

2. The calibration device for a combined tool according to claim 1, characterized in that: A directional screw (16) is provided on the mounting portion (12), and the directional screw (16) abuts against the center drill (2) through a threaded hole provided in the radial direction of the mounting portion (12), and is used to adjust the mounting direction of the center drill (2).

3. The calibration device for combined tools according to claim 1, characterized in that: A fixed-length stop bolt (17) is provided at the center of the shank (1), which is threadedly connected to the mounting hole (13), and the end of which abuts against one end of the center drill (2) for adjusting the length of the center drill (2) extending out of the mounting hole (13).

4. The calibration device for combined tools according to claim 1 or 3, characterized in that: A cutting fluid nozzle (18) is also provided on the tool handle (1), and the cutting fluid nozzle (18) is provided along the axial direction of the tool handle (1), with at least one nozzle provided, and is connected to the water channel of the machine tool.

5. The calibration device for combined tools according to claim 1, characterized in that: The guide mechanism (533) comprises a guide light rod (5331) and a linear bearing (5332). The guide light rod (5331) is connected to 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 light rod (5331) to ensure the parallelism of the height conversion plate (532) during movement.

6. The calibration device for combined tools according to claim 5, characterized in that: The guide mechanism (533) further includes a reset spring (5333), which is sleeved on the guide light rod (5331) and disposed between the base plate (41) and the linear bearing (5332), and is used to push the linear bearing (5332), the height conversion plate (532) and the center hole standard block (531) to reset.

7. The calibration device for combined tools according to claim 1, characterized in that: The clamping assembly (51) comprises a thread replacement block (511), a clamping plate (512) and a butterfly nut (513). The thread replacement block (511) is mounted on the positioning block (521). The thread replacement block (511) is sleeved on the clamping plate (512). By tightening the butterfly nut (513), the clamping plate (512) is driven downward to press the combined tool.

8. The calibration device for combined tools according to claim 1, characterized in that: The positioning assembly (52) comprises a positioning base (522) and a positioning block (521), wherein the positioning block (521) is mounted in the middle of the positioning base (522) and is fixedly connected to the positioning base (522) via a spring plunger (523); the positioning base (522) is mounted on the upper portion of the top plate (42), a positioning groove (5211) is provided inside the positioning block (521), the shape of the positioning groove (5211) being adapted to the shape of the tool handle (1), and the positioning block (521) is used to fix the combined tool and align its center drill (2) with the center hole standard block (531).

9. The calibration device for combined tools according to claim 8, characterized in that: The positioning blocks (521) are provided in a plurality of pieces, and each positioning block (521) is of a different model to adapt to the calibration of different models of combined tools.

10. The calibration device for combined tools according to claim 1, characterized in that: The height-fixing rods (43) are provided in a plurality, and the plurality of height-fixing rods (43) have the same length and are 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.

11. The calibration device for combined tools according to claim 7, characterized in that: The thread replacement block (511) is mounted on the positioning block (521), a clamping plate (512) is sleeved on the thread replacement block (511), and a butterfly nut (513) is screwed onto the threaded rod on the thread replacement block (511). By tightening the butterfly nut (513), the clamping plate (512) can be driven downward to press the combined tool.

12. A method for calibrating a combination tool, using the calibration device for a combination tool as claimed in any one of claims 5 to 11, characterized in that: The calibration method comprises the following steps: Place the combined tool into the positioning block (521), and clamp the combined tool through the clamping assembly (51); The center 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) by a calibrator (534), and adjusting the installation position of the center drill (2) on the calibrated combined tool according to the measurement result; Repeat the above steps until the reading of the calibrator (534) meets the requirements, fix the center drill (2) on the calibrated combined tool, and complete the calibration.

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