Boring device for special-shaped hole machining

Abstract

The invention relates to the technical field of special-shaped parts, and discloses a boring device for special-shaped hole machining. According to the device, a cutter is fixedly connected to the front surface of a cutter fixing disc, a connecting block is installed on the rear surface of the interior of the cutter, an air pump is arranged at the front end of the connecting block, and a suction cup opening is connected to the center position of the front surface of the air pump in a penetrating mode; a high-torque servo motor is integrated in the special-shaped hole boring device to directly drive a tool, a scrap suction structure is arranged in the tool, the servo motor can accurately and rapidly control radial dynamic displacement of the tool, efficient and high-precision machining of a complex special-shaped contour is achieved, gaps and lagging of mechanical transmission are avoided, and machining efficiency is improved. And meanwhile, a chipping suction structure integrated in the cutter can timely and forcefully suck chippings away at the machining position, the chippings are prevented from being accumulated in a special-shaped hole cavity, a servo driving mechanism is protected against pollution and interference, the stability and reliability of the machining process are greatly improved, and the shutdown cleaning time is shortened.

Description

Technical Field

[0001] The present application belongs to the technical field of special-shaped parts, and specifically relates to a boring device for machining special-shaped holes. Background Art

[0002] In the field of mechanical manufacturing, machining non-cylindrical internal holes (such as square holes, polygonal holes, and holes with irregular contours) has always been a technical challenge. Traditional boring processes rely primarily on the rotation of a circular boring tool, which is only suitable for cylindrical holes and is ineffective for holes with irregular contours. Traditionally, this has been achieved through slotting, electrical discharge machining, or a combination of multiple processes (such as milling followed by grinding). However, these methods generally suffer from low efficiency, difficulty in ensuring accuracy, poor surface quality, and high costs. To meet the growing demand for high-precision and high-efficiency machining of irregular holes (such as those in special mold cavities, hydraulic valve flow paths, and critical aerospace components), irregular hole boring devices have emerged. Their core principle is to precisely control the movement of a boring tool (or tool combination) along a preset non-circular trajectory through a precise contouring motion mechanism or CNC multi-axis linkage system. This allows high-precision boring of irregular holes on the workpiece to be completed in a single pass, significantly improving machining quality and efficiency.

[0003] Existing special-shaped hole processing has important applications in the field of mechanical manufacturing, especially in the processing of precision components such as automobile engine cylinder blocks and aerospace parts. Traditional special-shaped hole processing methods mainly include electrospark machining, laser cutting, and milling. Electrospark machining has high precision but low efficiency and expensive equipment costs; laser cutting is fast but has a large heat-affected zone, which can easily cause material deformation; milling processing has strong adaptability, but it is difficult to guarantee the processing accuracy and surface quality of complex special-shaped holes. As the manufacturing industry's requirements for part accuracy and efficiency continue to increase, there is an urgent need for an efficient and high-precision special-shaped hole processing device.

[0004] At present, common solutions for machining special-shaped holes include: (1) using a multi-axis CNC milling machine to program and control the tool path to achieve special-shaped hole machining, but the programming is complex and the machine tool precision is extremely high; (2) using special forming tools, such as broaches or reamers, to directly machine special-shaped holes, but the tool manufacturing cost is high and the versatility is poor; (3) using a combination boring tool to adjust the blade position to achieve different shapes of hole machining, but the adjustment process is cumbersome and the accuracy is difficult to guarantee. These methods each have their own advantages and disadvantages, and it is difficult to balance efficiency, precision and cost.

[0005] The main defects of the existing technology are: (1) low processing efficiency, especially EDM and special forming tool methods; (2) processing accuracy is limited by equipment and tools, and it is difficult to meet the needs of high-precision special-shaped holes; (3) poor versatility, special forming tools and combined boring tools are difficult to adapt to the processing of special-shaped holes of different shapes; (4) high cost, especially multi-axis linkage CNC milling machines and EDM equipment.

[0006] However, for general boring devices for special-shaped holes, debris needs to be cleaned in time when fine processing is performed on the details of the special-shaped holes. If the debris cannot be cleaned in time, the degree of fine processing may be affected. Summary of the Invention

[0007] The purpose of this application is to provide a boring device for machining special-shaped holes in order to solve the above-mentioned problems.

[0008] The technical solution adopted in this application is as follows: A boring device for processing special-shaped holes, comprising a base, a front plate welded at the front end edge of the upper surface of the base, a column welded at the rear end edge of the upper surface of the base, a main shaft is installed through the upper ends of the front and rear surfaces of the front plate, the front end of the main shaft is rotatably connected to a rotating shaft, the front end of the rotating shaft is penetrated by a workbench, the rotating shaft passes through the front end of the workbench and is fixedly connected to a fixed disk, a servo motor is fixedly installed on the front surface of the fixed disk, a tool fixing disk is rotatably provided at the center position of the front surface of the servo motor, the front surface of the tool fixing disk is fixedly connected to a tool, a connecting block is installed on the inner rear surface of the tool, an air pump is provided at the front end of the connecting block, and a suction cup port is penetrated and connected at the center position of the front surface of the air pump.

[0009] By adopting the above technical solution, a high-torque servo motor is integrated in the special-shaped hole boring device to directly drive the tool, and a chip suction structure is set inside the tool. The servo motor can accurately and quickly control the radial dynamic displacement of the tool, realize efficient and high-precision processing of complex special-shaped contours, avoid the gap and lag of mechanical transmission, and at the same time, the chip suction structure integrated inside the tool can promptly and forcefully remove the debris at the processing site, prevent the debris from accumulating in the special-shaped hole cavity, protect the servo drive mechanism from contamination and interference, greatly improve the stability and reliability of the processing process, and reduce the downtime for cleaning.

[0010] In a preferred embodiment, the rear end of the spindle is connected to a spindle box, a motor fixing block is installed on the rear end surface of the spindle box, a motor is installed at the center position of the rear surface of the motor fixing block, a cable protection shell is provided at the center position of the rear surface of the motor, and a cable is installed through the interior of the cable protection shell.

[0011] By adopting the above technical solution, the spindle is housed and driven by a spindle box, and the power is transmitted by connecting an external motor via a cable. This can make the spindle box structure more compact, better support high-speed rotation, and ensure higher machining accuracy. The motor is placed externally to prevent its own heat and vibration from being transmitted to the spindle, reduce the impact of thermal deformation on the hole shape, and make motor maintenance, heat dissipation and replacement more convenient.

[0012] In a preferred embodiment, a base fixing plate is welded to the lower edge of the side surface of the base, and fixing holes are opened at the front and rear edges of the upper surface of the base fixing plate.

[0013] By adopting the above-mentioned technical solution, a screw-fixing structure is designed at the bottom of the special-shaped hole boring device, effectively improving the rigidity and stability of the machining process. By tightening the screw, the bottom of the device is firmly pressed against the workpiece reference surface, significantly suppressing vibration and displacement during machining. It also ensures the accuracy of the tool's dynamic trajectory, which is fundamental to ensuring the contour accuracy of the special-shaped hole. The screw-fixing method also allows for necessary installation fine-tuning, making operation relatively straightforward and reliable, providing a solid support foundation for the entire machining system.

[0014] In a preferred embodiment, a feed mechanism is connected on the left and right sides of the front surface of the column through the front plate to the rear surface of the workbench, and a fixing ring is provided on the front and rear surfaces of the front plate at the outer circumferential surface of the feed mechanism, and a rear fixing block is installed on the feed mechanism through the rear surface of the column.

[0015] By adopting the above technical solution, a dedicated feed mechanism is installed in the special-shaped hole boring device to achieve precise and controllable processing. The feed mechanism can stably and reliably drive the tool or workpiece to complete axial feed motion. The controllable feed speed and depth directly determine the smoothness of the cutting process, surface quality, and the shape accuracy of complex contours. By precisely matching the tool's dynamic trajectory with the feed rate, the dimensional and geometric tolerance requirements of the special-shaped hole are guaranteed, while improving processing efficiency and process repeatability.

[0016] In a preferred embodiment, a guide rail is connected to the center of the front surface of the column, passing through the front plate to the rear surface of the workbench.

[0017] By adopting the above technical solution, precise guide rails are set in the device to ensure the straightness and smoothness of the tool feed motion, provide precise guidance for the moving parts, effectively suppress vibration during the processing, and significantly improve the shape accuracy and dimensional consistency of the hole, thereby enhancing the service life of the device.

[0018] In a preferred embodiment, a rotation hole is formed through the surface of the workbench relative to the rotation axis.

[0019] By adopting the above technical solution, a high-precision shaft hole is opened in the boring device, the purpose of which is to ensure the stability of the shaft rotation. This high-precision shaft hole provides a stable support point for the shaft, effectively constrains its displacement in the longitudinal position, reduces the instability of the shaft, and reduces the contour error during rotational boring. A good shaft hole design can significantly improve the rigidity of the spindle, reduce vibration, and ensure the accurate reproduction of the tool motion trajectory.

[0020] In a preferred embodiment, a connecting hole is provided on the side surface of the base.

[0021] By adopting the above technical solution and designing a dedicated external cable connection hole on the side of the device, the cable layout and protection problems can be solved. The connection hole provides a centralized connection line for the control line and sensor cable, preventing the cables from being randomly hung or entangled on the equipment components. It not only effectively protects the cables from cutting fluid splashing, chip scratching and accidental pulling damage, thereby improving the protection level and safety, but also makes cable connection, plug-in inspection and daily maintenance more convenient and clear, helps to keep the equipment tidy, and reduces failure downtime caused by cable interference or damage.

[0022] In a preferred embodiment, a protrusion is welded at the center of the rear surface of the servo motor, and a bottom block is provided inside the fixed plate for longitudinal movement inside the protrusion, and a spring is installed at the upper end of the bottom block.

[0023] By adopting the above technical solution and setting up a tool quick-change structure in the device, the processing efficiency and flexibility can be significantly improved. The operator can quickly complete the switching of tools of different shapes and sizes without complicated tools or long downtime, and easily cope with the processing needs of complex contour holes, reduce tool change auxiliary time, improve equipment utilization, and reduce the risk of errors caused by cumbersome operations. The rapid replacement capability makes the device more widely adaptable to diverse processing tasks and shortens production preparation time.

[0024] In a preferred embodiment, a pull block is provided through the outer circumferential surface of the fixing disk at a position opposite to the spring.

[0025] By adopting the above technical solution, a pull block is set in the tool quick change structure, which significantly optimizes the efficiency of the disassembly operation. The tool can be easily released from the locked state during installation and replaced by simply pulling the pull block upwards. In a space-constrained environment, the operation difficulty and the risk of accidental falling off are reduced, further shortening the tool change time and improving operational safety.

[0026] In a preferred embodiment, a connecting rod is connected from the lower end of the pulling block to the side surface of the bottom block, and a pulling hole is opened on the rear surface of the pulling block.

[0027] By adopting this technical solution, holes are added to the surface of the lifting block in the tool changer mechanism, further improving the adaptability and convenience of disassembly operations. When manual lifting is inconvenient, a simple hook or external device such as an automated manipulator can be inserted into the holes for assisted lifting. This significantly reduces the physical burden and operational risks of tool removal, making it particularly suitable for heavy-duty machining environments. The holes provide a standardized force point, ensuring directional control of the lifting force and enhancing the safety and reliability of the disassembly process.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are: 1. A high-torque servo motor is integrated into the special-shaped hole boring device to directly drive the tool, and a chip suction structure is set up inside the tool. The servo motor can accurately and quickly control the radial dynamic displacement of the tool, achieving efficient and high-precision processing of complex special-shaped contours, avoiding the gap and lag of mechanical transmission. At the same time, the chip suction structure integrated in the tool can promptly and forcefully remove chips at the processing point, preventing chips from accumulating in the special-shaped hole cavity, protecting the servo drive mechanism from contamination and interference, significantly improving the stability and reliability of the processing process, and reducing downtime for cleaning; Second, setting up a tool quick-change structure in the device can significantly improve processing efficiency and flexibility. The operator can quickly switch between tools of different shapes and sizes without complicated tools or long downtime, easily meeting the processing needs of complex contour holes, reducing tool change auxiliary time, improving equipment utilization, and reducing the risk of errors caused by cumbersome operations. The rapid replacement capability enables the device to adapt to a wide range of processing tasks and shortens production preparation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the external structure of this application; Figure 2 This is a schematic diagram of the derotating shaft structure in this application; Figure 3 This is a schematic diagram of the tool replacement structure in this application; Figure 4 Schematic diagram of the internal structure of the tool in this application; Figure 5 This is a schematic diagram of the pull block structure in this application.

[0030] Markings in the figure: 1. Base; 2. Fixing hole; 3. Connecting hole; 4. Column; 5. Cable; 6. Motor; 7. Motor fixing block; 8. Spindle box; 9. Front plate; 10. Spindle; 11. Rotating shaft; 12. Fixed plate; 13. Feed mechanism; 14. Base fixing plate; 15. Fixed ring; 16. Guide rail; 17. Workbench; 18. Rotating hole; 19. Cable protective shell; 20. Rear fixing block; 21. Servo motor; 22. Bump; 23. Pull block; 24. Spring; 25. Bottom block; 26. Tool fixing plate; 27. Tool; 28. Air pump; 29. Suction cup mouth; 30. Connecting block; 31. Pull hole; 32. Connecting rod. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] Example: Reference Figure 1-5 A boring device for processing special-shaped holes includes a base 1, a front plate 9 is welded at the front end edge of the upper surface of the base 1, a column 4 is welded at the rear end edge of the upper surface of the base 1, a main shaft 10 is installed through the upper ends of the front and rear surfaces of the front plate 9, the front end of the main shaft 10 is rotatably connected with a rotating shaft 11, the front end of the rotating shaft 11 is penetrated by a workbench 17, the rotating shaft 11 passes through the front end of the workbench 17 and is fixedly connected to a fixed disk 12, a servo motor 21 is fixedly installed on the front surface of the fixed disk 12, a tool fixing disk 26 is rotatably provided at the center position of the front surface of the servo motor 21, a tool 27 is fixedly connected to the front surface of the tool fixing disk 26, a connecting block 30 is installed on the inner rear surface of the tool 27, an air pump 28 is provided at the front end of the connecting block 30, and a suction cup port 29 is penetrated and connected at the center position of the front surface of the air pump 28.

[0033] A high-torque servo motor is integrated into the special-shaped hole boring device to directly drive the tool, and a chip suction structure is set inside the tool. The servo motor can accurately and quickly control the radial dynamic displacement of the tool, realizing efficient and high-precision processing of complex special-shaped contours, avoiding the gap and lag of mechanical transmission. At the same time, the chip suction structure integrated inside the tool can promptly and forcefully remove the debris at the processing site, preventing the accumulation of debris in the special-shaped hole cavity, protecting the servo drive mechanism from contamination and interference, greatly improving the stability and reliability of the processing process, and reducing downtime for cleaning.

[0034] Reference Figure 1-2 The rear end of the spindle 10 is connected to the spindle box 8, the rear end surface of the spindle box 8 is installed with a motor fixing block 7, the center position of the rear surface of the motor fixing block 7 is installed with a motor 6, the center position of the rear surface of the motor 6 is provided with a cable protection shell 19, and the interior of the cable protection shell 19 is installed with a cable 5 passing through it.

[0035] The spindle is housed in a spindle box and driven by a spindle box, which is connected to an external motor via a cable to transmit power. This makes the spindle box structure more compact, better supports high-speed rotation, and ensures higher machining accuracy. The motor is placed externally to prevent its own heat and vibration from being transmitted to the spindle, reducing the impact of thermal deformation on the hole shape, and making motor maintenance, heat dissipation, and replacement more convenient.

[0036] Reference Figure 1-2A base fixing plate 14 is welded at the lower edge of the side surface of the base 1, and fixing holes 2 are opened at the front and rear edges of the upper surface of the base fixing plate 14.

[0037] The screw-type mounting structure at the bottom of this special-shaped hole boring device effectively enhances the rigidity and stability of the machining process. Tightening the screw firmly presses the bottom of the device against the workpiece reference surface, significantly suppressing vibration and displacement during machining. It also ensures the accuracy of the tool's dynamic trajectory, fundamental to guaranteeing the contour accuracy of the special-shaped hole. Furthermore, the screw-type mounting method allows for necessary fine-tuning during installation, making operation relatively straightforward and reliable, and providing a solid foundation for the entire machining system.

[0038] Reference Figure 1-2 The left and right sides of the front surface of the column 4 pass through the front plate 9 to the rear surface of the workbench 17, and the feeding mechanism 13 is connected. The front and rear surfaces of the front plate 9 are located at the outer circumferential surface of the feeding mechanism 13. The feeding mechanism 13 passes through the rear surface of the column 4 and is installed with a rear fixing block 20.

[0039] A dedicated feed mechanism is incorporated into the special-shaped hole boring device to achieve precise and controllable machining. The feed mechanism stably and reliably drives the tool or workpiece in axial feed motion. Controllable feed speed and depth directly determine the smoothness of the cutting process, surface quality, and the shape accuracy of complex contours. By precisely matching the tool's dynamic trajectory with the feed rate, the required dimensions and form and position tolerances of the special-shaped hole are ensured, while simultaneously improving machining efficiency and process repeatability.

[0040] Reference Figure 1-2 The center position of the front surface of the column 4 passes through the front plate 9 and is connected to the guide rail 16 to the rear surface position of the workbench 17.

[0041] The purpose of setting up precise guide rails in the device is to ensure the straightness and smoothness of the tool feed motion, provide precise guidance for the moving parts, effectively suppress vibration during the processing, and significantly improve the shape accuracy and dimensional consistency of the hole, thereby enhancing the service life of the device.

[0042] Reference Figure 1-2 A rotation hole 18 is formed on the surface of the workbench 17 relative to the rotation shaft 11 .

[0043] A high-precision shaft hole is opened in the boring device to ensure the stability of the shaft rotation. This high-precision shaft hole provides a stable support point for the shaft, effectively restrains its displacement in the longitudinal position, reduces the instability of the shaft, and reduces the contour error during rotational boring. A good shaft hole design can significantly improve the rigidity of the spindle, reduce vibration, and ensure the accurate reproduction of the tool motion trajectory.

[0044] Reference Figure 1 The side surface of the base 1 is provided with a connection hole 3.

[0045] A dedicated external cable connection hole is designed on the side of the device to solve the problems of cable layout and protection. The connection hole provides a centralized connection line for control lines and sensor cables, preventing cables from hanging or entangled on equipment components. It not only effectively protects cables from cutting fluid splashes, chip scratches and accidental pulling damage, thereby improving the protection level and safety, but also makes cable connection, plug-in inspection and daily maintenance more convenient and clear, helping to keep the equipment tidy and reduce failure downtime caused by cable interference or damage.

[0046] Reference Figure 1-3 A protrusion 22 is welded at the center of the rear surface of the servo motor 21 , and a bottom block 25 is provided inside the fixed disk 12 for longitudinal movement at the inner side of the protrusion 22 , and a spring 24 is installed at the upper end of the bottom block 25 .

[0047] Setting up a quick tool change structure in the device can significantly improve processing efficiency and flexibility. The operator can quickly switch between tools of different shapes and sizes without complicated tools or long downtime, easily meeting the processing needs of complex contour holes, reducing tool change auxiliary time, improving equipment utilization, and reducing the risk of errors caused by cumbersome operations. The quick change capability makes the device more widely adaptable to diverse processing tasks and shortens production preparation time.

[0048] Reference Figure 1-3 A pull block 23 is provided through the outer circumferential surface of the fixed disk 12 relative to the spring 24 .

[0049] The pull block is set in the tool quick change structure to significantly optimize the efficiency of the disassembly operation. The locking state of the tool during installation can be easily released and the tool can be replaced by simply pulling the pull block upwards. In a space-constrained environment, the operation difficulty and the risk of accidental falling off are reduced, the tool change time is further shortened and the operation safety is improved.

[0050] Reference Figure 5 A connecting rod 32 is connected from the lower end of the pulling block 23 to the side surface of the bottom block 25 , and a pulling hole 31 is opened on the rear surface of the pulling block 23 .

[0051] The tool changer's lifting block features holes on its surface to further enhance the adaptability and convenience of disassembly operations. When manual lifting is inconvenient, a simple hook or external device, such as an automated manipulator, can be inserted into the holes for assisted lifting. This significantly reduces the physical burden and operational risks of tool removal, making it particularly suitable for heavy-duty machining environments. The holes provide a standardized force point, ensuring directional control of the lifting force and enhancing the safety and reliability of the disassembly process.

[0052] The implementation principle of the embodiment of a boring device for machining special-shaped holes in the present application is as follows: The boring device is driven by the high torque provided by 21 to output power to 27, and the special-shaped holes required by the special-shaped holes are finely processed by rotating 27. When chips are generated during processing, 28 set inside 27 is started, and the small chips generated by processing are sucked out by 29. In the process of processing different special-shaped holes, the tool can be quickly replaced through 12 at the rear end of 21. By inserting 22 on the rear surface of 21 into 12, 25 inside 12 can be pressed against 22 under the action of 24 to complete the tool fixation. When the tool needs to be disassembled, it can be done by inserting an external tool into the surface of 23 The tool 31 is opened and can be disassembled by pulling it upwards. By integrating a high-torque servo motor in the special-shaped hole boring device to directly drive the tool and setting a chip suction structure inside the tool, the servo motor can accurately and quickly control the radial dynamic displacement of the tool to achieve efficient and high-precision processing of complex special-shaped contours, avoiding gaps and lags in mechanical transmission. At the same time, the chip suction structure integrated inside the tool can promptly and forcefully remove the debris at the processing site to prevent the debris from accumulating in the special-shaped hole cavity, protect the servo drive mechanism from pollution and interference, greatly improve the stability and reliability of the processing process, and reduce downtime for cleaning.

[0053] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A boring device for machining special-shaped holes, comprising a base (1), characterized in that: A front plate (9) is welded at the front edge of the upper surface of the base (1), and a column (4) is welded at the rear edge of the upper surface of the base (1). A main shaft (10) is installed through the upper ends of the front and rear surfaces of the front plate (9), and the front end of the main shaft (10) is rotatably connected to a rotating shaft (11). A workbench (17) is installed through the front end of the rotating shaft (11), and the rotating shaft (11) is fixedly connected to the front end of the workbench (17). A servo motor (21) is fixedly installed on the front surface of the fixed disk (12), and a tool fixing disk (26) is rotatably installed at the center position of the front surface of the servo motor (21). A tool (27) is fixedly connected to the front surface of the tool fixing disk (26), and a connecting block (30) is installed on the inner rear surface of the tool (27). An air pump (28) is provided at the front end of the connecting block (30), and a suction cup port (29) is connected through the center position of the front surface of the air pump (28).

2. A boring device for machining special-shaped holes according to claim 1, characterized in that: The rear end of the spindle (10) is connected to a spindle box (8), a motor fixing block (7) is installed on the rear end surface of the spindle box (8), a motor (6) is installed at the center position of the rear surface of the motor fixing block (7), a cable protection shell (19) is provided at the center position of the rear surface of the motor (6), and a cable (5) is installed through the interior of the cable protection shell (19).

3. The boring device for machining special-shaped holes according to claim 1, characterized in that: A base fixing plate (14) is welded to the lower edge of the side surface of the base (1), and fixing holes (2) are provided at the front and rear edges of the upper surface of the base fixing plate (14).

4. The boring device for machining special-shaped holes according to claim 1, characterized in that: The left and right sides of the front surface of the column (4) pass through the front plate (9) to the rear surface of the workbench (17) and are connected to a feeding mechanism (13); the front and rear surfaces of the front plate (9) are provided with a fixing ring (15) at the outer circumferential surface of the feeding mechanism (13); the feeding mechanism (13) passes through to the rear surface of the column (4) and is installed with a rear fixing block (20).

5. The boring device for machining special-shaped holes according to claim 1, characterized in that: A guide rail (16) is connected at the center of the front surface of the column (4) through the front plate (9) to the rear surface of the workbench (17).

6. The boring device for machining special-shaped holes according to claim 1, characterized in that: A rotation hole (18) is provided through the surface of the workbench (17) at a position relative to the rotation shaft (11).

7. The boring device for machining special-shaped holes according to claim 1, characterized in that: A connecting hole (3) is provided on the side surface of the base (1).

8. The boring device for machining special-shaped holes according to claim 1, characterized in that: A protrusion (22) is welded at the center of the rear surface of the servo motor (21), and a bottom block (25) is provided inside the fixed disk (12) at a position inside the protrusion (22) for longitudinal movement, and a spring (24) is installed at the upper end of the bottom block (25).

9. The boring device for machining special-shaped holes according to claim 1, characterized in that: A pull block (23) is provided through the outer circumferential surface of the fixed disk (12) relative to the spring (24).

10. The boring device for machining special-shaped holes according to claim 9, characterized in that: A connecting rod (32) is connected from the lower end of the pulling block (23) to the side surface of the bottom block (25), and a pulling hole (31) is provided on the rear surface of the pulling block (23).

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