A vertical lathe for machining the inner hole of an iron core

Abstract

The utility model discloses a vertical lathe for processing the inner hole of iron core belongs to iron core mechanical processing technical field, it includes: long handle tool bit, bed body and clamping assembly, long handle tool bit includes the cylindrical long rod and is arranged at the cutter head of one end of cylindrical long rod, the bed body includes the liftable connecting seat, clamping assembly includes the tool holder, fastening unit and monitoring unit, and the middle part of tool holder is equipped with the clamping hole body for clamping cylindrical long rod, and the top of tool holder is detachable with connecting seat, and clamping hole body is coaxial with connecting seat and sets up, and one side of tool holder is equipped with the expansion joint who penetrates clamping hole body, and fastening unit sets up in the tool holder to extrude expansion joint, and clamping fixed cylindrical long rod, and monitoring unit sets up between cylindrical long rod and tool holder to detect the vibration of cylindrical long rod, the utility model can reduce the eccentricity of cutting, and alleviate the occurrence of vibration.

Description

Technical Field

[0001] This utility model relates to the field of iron core machining technology, and in particular to a vertical lathe for machining the inner hole of an iron core. Background Technology

[0002] In the manufacturing process of motor cores, some models require the machining of ultra-deep inner holes. These inner holes typically have a small diameter but a large depth, and traditional machining methods require the use of special long-shank cutting tools on a vertical lathe for cutting operations.

[0003] However, the existing clamping methods for long-shank turning tools have significant drawbacks: the tool is typically mounted on one side of the machine tool table, causing a misalignment between the tool holder's force centerline and the machine tool's Z-axis centerline. This misalignment means the tool is subjected to not only cutting forces in the Z-axis direction but also additional forces in the X-axis direction during machining. This multi-directional force condition easily induces high-frequency vibrations in the tool system, manifesting as periodic chattering of the tool holder. This vibration is directly transmitted to the machined surface, causing chatter marks on the inner hole wall and severely affecting the surface roughness. More seriously, continuous vibration leads to instability in the cutting process, making it difficult to maintain consistent machining dimensions, ultimately affecting the assembly accuracy and performance of the motor core. Utility Model Content

[0004] In view of this, it is necessary to provide a vertical lathe for machining the inner hole of an iron core, so as to solve the problem of tool holder vibration caused by tool eccentricity during the deep hole machining of existing motor iron cores.

[0005] This utility model provides a vertical lathe for machining the inner hole of an iron core, including a long shank cutting tool, the long shank cutting tool comprising a cylindrical rod and a cutting head disposed at one end of the cylindrical rod; characterized in that it further comprises: The bed frame includes a height-adjustable connecting seat; A clamping assembly includes a tool holder, a fastening unit, and a monitoring unit. The tool holder has a clamping hole in its center for clamping a cylindrical rod. The top of the tool holder is detachably connected to the connecting seat. The clamping hole is coaxially arranged with the connecting seat. An expansion joint is provided on one side of the tool holder, penetrating the clamping hole. The fastening unit is disposed in the tool holder to compress the expansion joint and clamp the cylindrical rod. The monitoring unit is disposed between the cylindrical rod and the tool holder to detect the vibration of the cylindrical rod.

[0006] Furthermore, the monitoring unit includes an arc-shaped groove formed on the tool holder and a detection element for detecting vibration. The arc-shaped groove is connected to the inner cavity of the clamping hole, and the detection element is installed in the arc-shaped groove. The detection element is capable of detecting the vibration of the cylindrical rod.

[0007] Furthermore, the detection component includes an arc-shaped bracket and multiple vibration detectors. The arc-shaped bracket is embedded in the arc-shaped groove. One end of the vibration detector is fixedly connected to the arc-shaped bracket, and the other end of the vibration detector abuts against the cylindrical rod. The multiple vibration detectors are arranged in an array around the axis of the clamping hole.

[0008] Furthermore, the fastening unit includes a fastening through hole and a first bolt. The fastening through hole extends through the tool holder and is connected to the expansion joint. The first bolt is connected to a nut through the fastening through hole.

[0009] Furthermore, the fastening unit also includes a fastening screw hole and a second bolt. The fastening screw hole communicates with the clamping hole body through the tool holder. The fastening screw hole is set perpendicular to the fastening through hole. The second bolt is screwed into the fastening screw hole to abut against the cylindrical rod.

[0010] Furthermore, multiple fastening through holes are equidistantly arranged along the height direction of the tool holder, and multiple fastening screw holes are equidistantly arranged along the height direction of the tool holder.

[0011] Furthermore, the inner wall of the clamping hole is provided with damping patterns, which are arranged around the central axis of the clamping hole.

[0012] Furthermore, the bottom of the connector is provided with an insertion hole that matches the diameter of the cylindrical rod, and the top of the insertion hole is provided with an abutting part that abuts against the bottom of the cylindrical rod.

[0013] Furthermore, the top of the tool holder is provided with an outwardly extending flange, which is detachably connected to the connecting seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model discloses a vertical lathe for machining the inner hole of an iron core. The lathe includes a clamping assembly comprising a tool holder, a fastening unit, and a monitoring unit. The tool holder has a clamping hole in its center for clamping a cylindrical rod. The top of the tool holder is detachably connected to a connecting seat. The clamping hole and the connecting seat are coaxially aligned. The cylindrical rod, positioned within the clamping hole, can be aligned with the Z-axis of the machine tool, reducing cutting eccentricity and minimizing vibration. An expansion joint extending through the clamping hole is provided on one side of the tool holder. The fastening unit is located within the tool holder. By compressing the expansion joint, its width can be altered, thereby clamping and fixing the cylindrical rod. The monitoring unit is positioned between the cylindrical rod and the tool holder. This monitoring unit can detect the vibration of the cylindrical rod in real time, improving the machining accuracy of the inner hole of the iron core. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the clamping assembly in this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the detection component in this utility model; Figure 4 This is a schematic diagram of the clamping assembly in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the clamping assembly in this utility model. Figure 3 ; Figure 6 yes Figure 5 Sectional view along the middle AA direction; Figure 7 This is a schematic diagram of the connection structure between the long shank lathe tool and the lathe bed in this utility model.

[0016] In the diagram, 100 is a long-shank lathe tool; 110 is a cylindrical long rod; and 120 is the tool tip. 200. Bed frame; 210. Connecting seat; 211. Insertion hole body; 211a. Contact part; 300 Clamping assembly; 310 Tool holder; 311 Clamping hole body; 311a Damping groove; 312 Expansion joint; 313 Flanged edge; 320 Monitoring unit; 321 Arc groove; 322 Detector; 322a Arc bracket; 322b Vibration detector; 330 Fastening unit; 331 Fastening through hole; 332 Fastening screw hole. Detailed Implementation

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0018] This embodiment describes a vertical lathe for machining the inner bore of iron cores, relating to the field of iron core machining technology. It features a clamping structure coaxially connected to a liftable connecting seat 210, adjusting the tool clamping point to the spindle centerline to reduce cutting eccentricity and minimize vibration. Simultaneously, a vibration monitoring function is integrated into the clamping structure to perceive tool dynamics in real time, providing data support for optimizing process parameters.

[0019] Please see Figures 1 to 7 In this embodiment, a vertical lathe for machining the inner hole of an iron core includes a long shank cutting tool 100. The long shank cutting tool 100 includes a cylindrical long rod 110 and a cutting head 120 disposed at one end of the cylindrical long rod 110. The cylindrical long rod 110 is clamped on the lathe, and the cutting head 120 performs mechanical cutting on the inner hole of the iron core.

[0020] A vertical lathe for machining the inner hole of an iron core also includes a bed 200 and a clamping assembly 300. The bed 200 includes a connecting seat 210, which can be fed and moved along the Z-axis. The clamping assembly 300 includes a tool holder 310, a fastening unit 330, and a monitoring unit 320. The tool holder 310 has a clamping hole 311 in the middle for clamping a cylindrical rod 110. The top of the tool holder 310 is detachably connected to the connecting seat 210. The clamping hole 311 is coaxially arranged with the connecting seat 210. The cylindrical rod 110 set in the clamping hole 311 can be relatively coincident with the Z-axis of the machine tool, reducing the degree of cutting eccentricity and mitigating vibration. The tool holder 310 has an expansion joint 312 extending through the clamping hole 311 on one side. A fastening unit 330 is disposed in the tool holder 310. With the help of the fastening unit 330, the expansion joint 312 can be squeezed to change its width, thereby achieving clamping and fixing of the cylindrical rod 110. A monitoring unit 320 is disposed between the cylindrical rod 110 and the tool holder 310. The monitoring unit 320 can detect the vibration of the cylindrical rod 110 in real time, improving the machining accuracy of the inner hole of the iron core.

[0021] During use, the tool holder 310 is fixed below the lifting connecting seat 210 via a detachable connection, ensuring that the axis of the clamping hole 311 coincides with the machine tool spindle, eliminating radial eccentricity. During clamping, the tool shank is inserted into the clamping hole 311, and the expansion joint 312 is closed by the fastening unit 330, generating a uniform radial clamping force. During machining, the monitoring unit 320 continuously collects tool vibration signals; when abnormal vibration is detected, cutting parameters can be adjusted promptly or the machine can be stopped for maintenance.

[0022] Compared to existing technologies, traditional side-mounted clamping methods subject the tool to additional bending moments, while this solution uses coaxial clamping to ensure that the cutting force is transmitted entirely axially. Existing technologies lack vibration monitoring capabilities, while this solution integrates sensors into the clamping structure to achieve real-time feedback on the machining status.

[0023] In some embodiments, please refer to Figures 2 to 4The monitoring unit 320 includes an arc-shaped groove 321 formed on the tool holder 310 and a detection element 322 for detecting vibration. The arc-shaped groove 321 is connected to the inner cavity of the clamping hole 311. The detection element 322 is installed in the arc-shaped groove 321. The detection element 322 can identify the vibration state of the cylindrical rod 110 in real time and optimize the machining parameters through data feedback to suppress the influence of tool vibration on machining accuracy, thereby improving the surface quality and dimensional consistency of the inner hole.

[0024] In practical implementation, the arc-shaped groove 321 is an arc-shaped structure formed on the surface of the tool holder 310 and communicating with the inner cavity of the clamping hole 311. It can be formed by machining, and its curvature matches the axis of the clamping hole 311 to provide installation space for the detection element 322. The detection element 322 is a sensing device capable of sensing mechanical vibration, which collects vibration signals in real time by contacting the surface of the cylindrical rod 110.

[0025] When the cylindrical rod 110 vibrates during machining, the detection element 322 maintains contact with the surface of the cylindrical rod 110 through the arc-shaped groove 321. The vibration signal is converted into an electrical signal and transmitted to the control system. After analysis of the vibration data, the vibration amplitude can be suppressed by adjusting the machine tool feed speed or the tool position. For example, the detection element 322 can be evenly distributed circumferentially along the arc-shaped groove 321 to ensure multi-point monitoring of the vibration state at different positions of the cylindrical rod 110.

[0026] For further implementation methods, please refer to Figure 3 The detection component 322 includes an arc-shaped bracket 322a and multiple vibration detectors 322b. The arc-shaped bracket 322a is embedded in an arc-shaped groove 321. One end of the vibration detector 322b is fixedly connected to the arc-shaped bracket 322a, and the other end of the vibration detector 322b abuts against the cylindrical rod 110. The multiple vibration detectors 322b are arranged in an array around the axis of the clamping hole 311. The multiple vibration detectors 322b provide all-round real-time monitoring of the circumferential vibration of the long shank turning tool 100. Through collaborative analysis of data from multiple detection points, clamping abnormalities or uneven tool force can be quickly located, effectively suppressing tool vibration during machining, thereby improving the surface machining quality of the inner hole and ensuring dimensional stability.

[0027] In practical implementation, the arc-shaped bracket 322a is a support structure with a curvature matching that of the arc-shaped groove 321. It can be made of metal or composite materials and is used to fix the installation position of the vibration detector 322b. Its embedding in the arc-shaped groove 321 ensures a stable connection with the tool holder 310. The vibration detector 322b is a sensing element for detecting mechanical vibration, specifically a piezoelectric sensor. When it abuts against the cylindrical rod 110, it can collect tool vibration signals in real time. Multiple detectors are evenly distributed along the circumference, specifically 3-6 detectors. Multi-angle synchronous monitoring can cover the vibration state at different positions around the cylindrical rod 110.

[0028] The arc-shaped bracket 322a is fixed in the arc-shaped groove 321 of the tool holder 310 by fitting, forming a rigid support base. Multiple vibration detectors 322b are evenly arranged circumferentially along the axis of the clamping hole 311, and their detection ends are in contact with the surface of the cylindrical rod 110. When the tool is machining, the radial vibration generated by the cylindrical rod 110 is transmitted to each detector, and the array of detectors can simultaneously collect vibration data from different angles. By analyzing the differences in vibration signals at multiple detection points, it is possible to determine whether the tool is vibrating abnormally due to clamping eccentricity or uneven force, and then adjust the locking force or position of the fastening unit 330.

[0029] In some embodiments, please refer to Figure 5 and Figure 6 The fastening unit 330 includes a fastening through hole 331 and a first bolt. The fastening through hole 331 penetrates the tool holder 310 and is connected to the expansion joint 312. The first bolt is connected to the tool holder through the fastening through hole 331. Through the synergistic effect of the fastening through hole 331 penetrating the tool holder 310 and the expansion joint 312, the first bolt can evenly transmit the clamping force along the circumference of the clamping hole 311, preventing the tool holder from deflecting due to single-point force. At the same time, the tightening effect of the first bolt can significantly improve the clamping rigidity during machining, effectively suppressing the radial displacement of the tool caused by insufficient clamping force, thereby reducing the impact of cutting vibration on the machining accuracy of the inner hole. In practical implementation, the fastening through hole 331 is a channel structure that penetrates the tool holder 310 and communicates with the expansion joint 312. Specifically, it can be implemented by using a cylindrical through hole penetrating the side wall of the tool holder 310 to accommodate the installation of the first bolt. The first bolt is a threaded fastener, specifically a standard hexagonal head bolt, which applies radial pressure to the expansion joint 312 by screwing it into the fastening through hole 331.

[0030] When the first bolt is screwed into the fastening through hole 331, its end abuts against the tool holder 310 structure on both sides of the expansion joint 312. The radial pressure generated by the threaded advancement reduces the gap of the expansion joint 312, thereby forcing the inner wall of the clamping hole 311 to fit tightly against the surface of the cylindrical rod 110. During this process, the axial locking force of the first bolt is converted into a radial clamping force on the clamping hole 311, forming a stable three-point contact clamping state.

[0031] In some embodiments, the fastening unit 330 further includes a fastening screw hole 332 and a second bolt. The fastening screw hole 332 communicates with the clamping hole body 311 via the tool holder 310. The fastening screw hole 332 is set perpendicular to the fastening through hole 331. The second bolt is screwed into the fastening screw hole 332. The end of the second bolt can abut against the cylindrical rod 110. The first bolt and the second bolt are arranged relatively perpendicularly to each other, forming complementary clamping forces in the axial and radial directions. This can reduce the combined vibration of the tool caused by bidirectional force, significantly improve the clamping stability of the tool holder, thereby improving the surface roughness of the inner hole and ensuring the machining dimensional accuracy.

[0032] In practical implementation, the fastening screw hole 332 is a threaded hole structure that penetrates the tool holder 310 and communicates with the clamping hole body 311. Specifically, it can be implemented by using a stepped hole with a threaded sleeve to accommodate the screwing path of the second bolt. The second bolt is a rod-shaped fastener with external threads, which can be implemented by using a hexagonal head bolt with a flat washer to apply radial constraint to the cylindrical rod 110 through axial pressure.

[0033] A fastening screw hole 332, perpendicular to the fastening through hole 331, is opened on the side of the clamping body 311. After the second bolt is screwed in, its end directly abuts against the surface of the cylindrical rod 110. When the first bolt achieves initial clamping by squeezing the expansion joint 312 through the fastening through hole 331, the second bolt can further apply auxiliary pressure perpendicular to the clamping direction, forming a two-way clamping structure. When the tool is subjected to cutting force and undergoes radial displacement, the preload of the second bolt in the two-way clamping structure counteracts the vibration energy.

[0034] It should be further noted that multiple fastening through holes 331 are equidistantly arranged along the height direction of the tool holder 310, and multiple fastening screw holes 332 are equidistantly arranged along the height direction of the tool holder 310. The spacing between the fastening through holes 331 and the spacing between the fastening screw holes 332 can be 50 mm or 100 mm, depending on the length of the cutting tool.

[0035] Multiple fastening through holes 331 and fastening screw holes 332 distributed along the height direction of the tool holder 310 form multiple sets of fastening units 330. The operator can select the fastening point at the corresponding height according to the clamping position of the cylindrical long rod 110. When the long shank turning tool 100 needs to adjust the clamping height due to machining requirements, the first bolt is screwed into the fastening through hole 331 of the matching height, so that the expansion joint 312 generates a clamping force to fix the turning tool. At the same time, the second bolt is screwed into the fastening screw hole 332 of the corresponding height to further tighten the turning tool shank body.

[0036] The evenly spaced fastening holes ensure the cutting tool is always stably clamped close to the machining area, reducing radial runout caused by excessive overhang. The synergistic effect of multiple fastening units 330 enhances clamping rigidity, ensuring the cutting tool position does not shift under cutting forces.

[0037] In some embodiments, please refer to Figure 6 The clamping hole 311 has damping grooves 311a inside, which are arranged around the central axis of the clamping hole 311. By adding damping grooves 311a, the clamping stability is improved by optimizing the micro-morphology of the contact surface without changing the clamping structure, and the machining error caused by tool vibration is reduced.

[0038] In practical implementation, the damping pattern 311a is a textured structure distributed around the inner wall of the clamping hole 311, which can be achieved by using spiral patterns or annular grooves formed by machining. The damping pattern 311a increases the frictional resistance between the clamping hole 311 and the cylindrical rod 110, thereby suppressing the lateral vibration generated by the cylindrical rod 110 during machining.

[0039] The damping grooves 311a are arranged continuously or at intervals along the central axis of the clamping hole 311. When the fastening unit 330 compresses the expansion joint 312, the damping grooves 311a on the inner wall of the clamping hole 311 form multi-point contact with the surface of the cylindrical rod 110. During the machining process, when the cylindrical rod 110 undergoes a small displacement under the action of cutting force, the frictional resistance generated by the damping grooves 311a can offset part of the vibration energy, thereby reducing the tool chatter amplitude.

[0040] In some embodiments, please refer to Figure 7 The bottom of the connecting seat 210 is provided with an insertion hole 211 that matches the diameter of the cylindrical rod 110. The top of the insertion hole 211 is provided with a contact end that abuts against the bottom of the cylindrical rod 110. By providing a coaxial insertion hole 211 in the connecting seat 210, the tool clamping position is made to coincide with the machine tool spindle axis. At the same time, the contact end forms an axial limit, eliminating the possibility of tool deviation in both radial and axial dimensions. During the machining process, the tool only bears the cutting force in the Z-axis direction, avoiding tool vibration caused by uneven force, thereby improving the surface quality and dimensional accuracy of the internal hole machining.

[0041] In practical implementation, the insertion hole 211 is a cylindrical hole structure that forms a clearance fit or transition fit with the outer diameter of the cylindrical rod 110. Specifically, it can be precision machined to form a hole structure that matches the diameter of the tool shank, used to achieve coaxial positioning of the tool shank and the machine tool connecting seat 210. The abutting end is an annular boss structure set on the top of the insertion hole 211, which can be machined to form a stepped surface, used to limit the axial displacement of the cylindrical rod 110.

[0042] During tool clamping, the bottom of the cylindrical rod 110 is inserted into the insertion hole 211, and its outer wall forms a radial constraint with the inner wall of the insertion hole 211, ensuring that the tool centerline coincides with the machine tool spindle axis. When the connecting seat 210 drives the tool holder 310 to move up and down, the contact end forms rigid contact with the bottom of the cylindrical rod 110, eliminating any axial movement that may occur during machining. This dual positioning structure ensures that the movement trajectory of the long shank turning tool 100 in the Z-axis direction remains strictly consistent with the machine tool spindle.

[0043] In some embodiments, the top of the tool holder 310 is provided with an outwardly extending flange 313, which is detachably connected to the connecting seat 210. The flange 313 significantly improves the vibration resistance of the tool holder 310 and the connecting seat 210 by increasing the contact area and dispersing the locking force, while also facilitating disassembly and maintenance.

[0044] In practical implementation, the flange 313 is an annular or partially protruding structure extending outward from the top of the tool holder 310. It can be integrally formed with the tool holder 310 through casting or machining. Its function is to increase the contact area between the tool holder 310 and the connecting seat 210, thereby improving connection stability. The flange 313 and the connecting seat 210 are mechanically connected via threaded fasteners. Specifically, bolts or screws can be used to fix them through the corresponding threaded holes of the flange 313 and the connecting seat 210. This provides a detachable rigid connection while allowing adjustment of the alignment accuracy of the tool holder 310 and the connecting seat 210 during clamping.

[0045] The flange 313 is configured as a continuous structure surrounding the top outer edge of the tool holder 310, and its width can be adjusted according to the size of the connecting seat 210. During assembly, the flange 313 is aligned with the corresponding holes on the bottom of the connecting seat 210 through multiple circumferentially distributed threaded holes, and then fixed by screwing in bolts. The mating structure of the flange 313 and the bolts ensures that the tool holder 310 and the connecting seat 210 form a surface contact rather than a point contact, thereby dispersing the vibration energy generated during machining and preventing loosening of the connection due to local stress concentration.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the present utility model.

Claims

1. A vertical lathe for machining the inner hole of an iron core, comprising a long shank cutting tool, the long shank cutting tool comprising a cylindrical long rod and a cutting head disposed at one end of the cylindrical long rod; characterized in that, Also includes: The bed frame includes a height-adjustable connecting seat; A clamping assembly includes a tool holder, a fastening unit, and a monitoring unit. The tool holder has a clamping hole in its center for clamping a cylindrical rod. The top of the tool holder is detachably connected to the connecting seat. The clamping hole is coaxially arranged with the connecting seat. An expansion joint is provided on one side of the tool holder, penetrating the clamping hole. The fastening unit is disposed in the tool holder to compress the expansion joint and clamp the cylindrical rod. The monitoring unit is disposed between the cylindrical rod and the tool holder to detect the vibration of the cylindrical rod.

2. A vertical lathe for machining the inner hole of an iron core according to claim 1, characterized in that, The monitoring unit includes an arc-shaped groove formed on the tool holder and a detection element for detecting vibration. The arc-shaped groove is connected to the inner cavity of the clamping hole, and the detection element is installed in the arc-shaped groove. The detection element can detect the vibration of the cylindrical rod.

3. A vertical lathe for machining the inner hole of an iron core according to claim 2, characterized in that, The detection component includes an arc-shaped bracket and multiple vibration detectors. The arc-shaped bracket is embedded in the arc-shaped groove. One end of the vibration detector is fixedly connected to the arc-shaped bracket, and the other end of the vibration detector abuts against the cylindrical rod. The multiple vibration detectors are arranged in an array around the axis of the clamping hole.

4. A vertical lathe for machining the inner hole of an iron core according to claim 1, characterized in that, The fastening unit includes a fastening through hole and a first bolt. The fastening through hole is disposed through the tool holder and is connected to the expansion joint. The first bolt is connected to a nut through the fastening through hole.

5. A vertical lathe for machining the inner hole of an iron core according to claim 4, characterized in that, The fastening unit also includes a fastening screw hole and a second bolt. The fastening screw hole is connected to the clamping hole through the tool holder. The fastening screw hole is set perpendicular to the fastening through hole. The second bolt is screwed into the fastening screw hole to abut against the cylindrical rod.

6. A vertical lathe for machining the inner hole of an iron core according to claim 5, characterized in that, Multiple fastening through holes are equidistantly arranged along the height direction of the tool holder, and multiple fastening screw holes are equidistantly arranged along the height direction of the tool holder.

7. A vertical lathe for machining the inner hole of an iron core according to claim 1, characterized in that, The inner wall of the clamping hole is provided with damping grooves, which are arranged around the central axis of the clamping hole.

8. A vertical lathe for machining the inner hole of an iron core according to claim 1, characterized in that, The bottom of the connector is provided with an insertion hole that matches the diameter of the cylindrical rod, and the top of the insertion hole is provided with an abutting part that abuts against the bottom of the cylindrical rod.

9. A vertical lathe for machining the inner hole of an iron core according to claim 1, characterized in that, The top of the tool holder is provided with an outwardly extending flange, which is detachably connected to the connecting seat.

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