A process for processing corner shields of circuit breakers and a milling rounded corner machine for processing them.

Abstract

This invention relates to the field of milling technology, specifically to a process for processing a circuit breaker corner shield and a milling rounded corner device for processing. The device base has a fixed device fixedly connected to its top. The fixed frame is a C-shaped structure, and the fixed end of a swing assembly is fixedly connected to the side of the fixed frame. The milling support is a hollow frame structure, and its side is fixedly connected to the movable end of the swing assembly. A milling device is fixedly connected to the bottom of the inner wall of the milling support, and the milling device is positioned above the fixed device. In this milling rounded corner device, airflow enters the connecting pipe through the connecting sleeve; the rotation of the inner pipe drives the connecting sleeve and connecting pipe to rotate, causing the milling cutter head to obtain a rotary cutting motion. The airflow enters the air outlet along the connecting pipe and is ejected from the side wall of the air outlet, creating a pneumatic cleaning effect at the milling position, blowing away metal debris; the downward angle of the air outlet causes the debris to fall, completing the cleaning of the shield.

Description

Technical Field

[0001] This invention relates to the field of milling technology, specifically to a process for machining a circuit breaker corner shield and a milling rounded corner device for machining it. Background Technology

[0002] In high-voltage circuit breakers, due to the presence of sharp corners and burrs on the surfaces of stationary contacts and stationary main contacts, most circuit breakers have shielding covers installed in the arc-extinguishing chamber to reduce insulation breakdown caused by the concentrated electric field intensity formed by these sharp corners and burrs. Corner shielding covers are an important component of the shielding device. In the intermediate valve layer of high-voltage DC circuit breakers, corner shielding covers are used in conjunction with straight-plate shielding covers, corresponding to the various valve modules and switching assemblies of the circuit breaker valve layer, forming the shielding unit of the valve layer assembly. Existing shielding cover structures typically include a cylindrical body. The upper end of the cylindrical body is flanged inwards to form a connecting inner cylinder, and the lower end of the cylindrical body is rolled inwards or outwards to form an arc-shaped flange. The machining accuracy of this arc-shaped flange directly affects the electric field shielding effect of the shielding cover and the overall performance of the circuit breaker.

[0003] CN106514262A discloses a rounded corner and irregular hole milling equipment that integrates an irregular broach with a milling cutter, enabling the simultaneous processing of different types of workpieces and avoiding the limitation of a single function for the milling cutter. This irregular broach prevents the processing difficulties of machining ultra-hard materials and complex irregular parts under special conditions, improving part quality and efficiency. In order to solve the problem that in the prior art, the shield is fixed to the workpiece fixture by the interference fit of the mold, this clamping method requires the replacement of different molds for shields of different specifications, and the clamping force of the interference fit is not easy to control, which can easily lead to ellipticity deviation of the thin-walled shield. Summary of the Invention

[0004] The technical solution provided by this invention is as follows: a process for processing corner shields of circuit breakers and a milling rounded corner device for processing, comprising:

[0005] Process 1: Workpiece clamping and positioning

[0006] Place the circuit breaker corner shield blank on the internal support positioning fixture and provide radial auxiliary support near the milling area;

[0007] Step 2: End Milling

[0008] Start the rounded corner milling equipment, the milling cutter rotates, and the contour feed mechanism drives the milling cutter to mill along the predetermined trajectory of the shield port edge, removing the main excess material of the port edge and forming an arc-shaped flange profile;

[0009] Step 3: Unloading and Inspection

[0010] Loosen the internal support positioning clamp and auxiliary support device, remove the finished shielding cover, and perform dimensional inspection and quality inspection.

[0011] Preferred,

[0012] The equipment base is configured as a planar frame structure, and a fixing device is fixedly connected to the top of the equipment base;

[0013] A fixed frame, wherein the fixed frame is configured as a C-shaped structure, and the fixed end of the swing assembly is fixedly connected to the side of the fixed frame;

[0014] A milling bracket, wherein the milling bracket is configured as a hollow frame structure, the side of the milling bracket is fixedly connected to the movable end of the swing assembly, and a milling device is fixedly connected to the bottom of the inner wall of the milling bracket, the milling device being positioned above the fixed device;

[0015] Preferably, the connecting pipe is configured as a hollow structure, a connecting sleeve is fixedly connected to the top of the connecting pipe, an air inlet sleeve is fixedly connected to the top of the connecting sleeve, a drive shaft of a first motor is fixedly connected to the top of the air inlet sleeve, the bottom of the first motor is fixedly connected to the bottom of the inner wall of the milling bracket, and a milling cutter head is fixedly connected to the bottom of the connecting pipe.

[0016] The air outlet is configured to face downwards and has a certain tilt angle. The air outlet is located on the side of the connecting pipe and is evenly distributed on the side of the connecting pipe. The shield is fixed by a fixing device. The equipment base supports the bottom of the fixing device and the bottom of the fixing frame. The milling bracket is moved by the drive end of the swing component. The movement of the milling bracket drives the milling device to start. The milling device enters the interior of the shield to perform milling. The specific position inside the shield is precisely milled by the drive of the swing component.

[0017] This allows for the milling of rounded corners. The internal support design of the fixing device prevents the shield from deforming or denting during milling. The first motor is started, and the drive shaft of the first motor rotates, causing the inner tube of the air intake sleeve to rotate. The outer tube of the air intake sleeve introduces compressed air, which descends along the connecting sleeve and enters the interior of the connecting pipe. The rotation of the inner tube of the air intake sleeve causes the connecting sleeve to rotate, which in turn causes the connecting pipe to rotate. The rotation of the connecting pipe causes the milling cutter head to rotate, and the air enters the interior of the air outlet along the connecting pipe and is then ejected along the inner wall of the air outlet. During milling, metal chips are pneumatically cleaned, and the downward angle setting facilitates the guidance and descent of metal chips, thereby cleaning the shield.

[0018] Preferably, the connecting ring is configured as a tapered structure with symmetrical upper and lower sides, and a flexible ring is connected through and fixedly connected to the side of the connecting ring;

[0019] A limiting ring is provided, wherein the limiting ring is configured as a ring structure, and a fixing ring is sleeved and fixedly connected to the side of the limiting ring, and the side of the fixing ring is fixedly connected to the inner wall side of the connecting pipe.

[0020] Preferably, the milling cutter head includes a ventilation pipe, a spherical base is fixedly connected to the bottom of the ventilation pipe, an air outlet is opened on the inner side of the ventilation pipe, and an arc-shaped milling cutter is fixedly connected to the side of the spherical base.

[0021] Preferably, the arc-shaped milling cutter is configured to conform to the shape of the side of the spherical base. The arc-shaped milling cutter is configured as a downward-guided arc-shaped strip structure. The nested arrangement of the fixing ring and the limiting ring facilitates the quick replacement of the connecting ring. The vibration of the connecting pipe is absorbed by the material of the flexible ring, which prevents the vibration from being directly transmitted to the top of the air intake sleeve and causing displacement that affects the cutting quality. The small displacement between the fixing ring and the limiting ring is also mitigated.

[0022] The top and bottom air inlet sleeves and connecting pipes of the connecting ring are offset by a certain angle, which facilitates milling at a certain eccentric angle. The rotation of the connecting pipe drives the rotation of the ventilation pipe, which in turn drives the rotation of the spherical base. The spherical shape of the spherical base facilitates the direct generation of rounded corners at the milling position of the shield. The air outlet allows the air inside the ventilation pipe to be ejected along the air outlet. When the spherical base drives the arc milling cutter to mill the edge of the shield, metal debris is pneumatically cleaned. The arc shape of the arc milling cutter guides the metal debris downwards during rotation, and the arc shape of the arc milling cutter directly mills out the pre-set rounded corners.

[0023] Preferably, the fixing device includes a sliding frame, a fixed end of a telescopic rod is fixedly connected to the bottom of the inner wall of the sliding frame, a movable frame is fixedly connected to the movable end of the telescopic rod, a guide cover is sleeved and fixedly connected to the side of the movable frame, an adjustment component is fixedly connected to the top of the movable frame, a guide cover is fixedly connected to the side of the adjustment component, and an inner support component is fixedly connected to the top of the adjustment component.

[0024] Preferably, the guide cover is configured as an arc-shaped guide structure, the bottom of the sliding frame is fixedly connected to the top of the equipment base, the sliding frame provides fixed support for the telescopic rod, the movable end of the telescopic rod drives the moving frame to move, and the movement of the moving frame drives the adjustment component to move.

[0025] The guide cover guides and cleans the downward-flowing metal debris, and the adjusting component moves the inner support component to provide internal support and fixation for the shielding cover. The electric belt assembly is activated, and its rotating part drives a screw to descend via a thread. The screw descends along the top of the fixed base, driving the adjusting bracket to descend, which in turn drives the contact wheel to descend. The contact wheel presses and deflects the side of the inner support component, thus providing internal support and fixation for shielding covers of different diameters, preventing dents and deformation of the shielding cover.

[0026] Preferably, the adjustment assembly includes a fixed base, a screw is slidably connected through the top of the fixed base, a rotating part of an electric belt assembly is sleeved and threadedly connected to the side of the screw, a fixed part of the electric belt assembly is fixedly connected to the bottom of the fixed base, an adjustment bracket is sleeved and rotatably connected to the top of the screw, and a contact wheel is rotatably connected to the side of the adjustment bracket.

[0027] Preferably, the side of the contact wheel contacts the side of the inner support assembly, the top of the fixed base is provided with a triangular fixed base, the side of the screw is provided with a guide groove, and the side of the contact wheel is provided with a limiting annular structure.

[0028] Preferably, the inner support assembly includes a rotating base, a spring strip is sleeved and rotatably connected to the side of the rotating base, a fixed shaft is fixedly connected to the bottom side of the spring strip, a rotating ring is fixedly connected to the side of the rotating base, a limiting post adapted to the rotating ring is fixedly connected to the side of the spring strip, and an inner support post is penetrated and fixedly connected to the top of the rotating base.

[0029] The side of the contact wheel contacts the side of the spring bar, and the spring bar is fixedly connected to the top of the fixed base through a fixed shaft;

[0030] The inner support column includes a contact column, an elastic strip is fixedly connected to the side of the contact column, an elastic wheel is fixedly connected to the inner wall side of the elastic strip, the elastic wheel is sleeved on the side of the contact column and fixedly connected to the side of the contact column, and a fixing column is fixedly connected to the bottom of the contact column.

[0031] The fixed column passes through the top of the rotating base and is fixedly connected to the top of the rotating base. The contact wheel presses against the side of the spring strip, and the fixed shaft fixes the spring strip. The spring strip is deflected by the pressure, which drives the rotating base to move. The movement of the rotating base drives the inner support column to support and fix the inner wall side of the shielding cover.

[0032] The rotating ring on the side of the rotating base and the limiting post on the side of the elastic bar rotate and limit the rotation, so that the rotating base has a certain angle deflection effect. When supporting the inside of the shielding cover, it automatically deflects and limits the rotation. The fixed post prevents the side of the contact post from deflecting from the inside of the shielding cover during milling. The elastic strip and elastic wheel provide adaptive elastic support for the inside of the irregular shielding cover. The arc groove on the side of the contact post increases the rolling of the limiting post inside the shielding cover.

[0033] The beneficial effects of the technical solution provided by this invention include:

[0034] 1. The shielding cover is positioned using a fixing device, with the equipment base providing bottom support for the fixing device and frame. The drive end of the swing assembly moves the milling bracket to the working position, and the milling device then enters the shielding cover to perform milling. Driven by the swing assembly, the milling position precisely corresponds to the rounded corner area inside the shielding cover. The fixing device adopts an internal support structure, ensuring the shielding cover maintains its original contour during milling, preventing deformation or dents. After the first motor starts, the inner tube of the air inlet sleeve rotates, while the outer tube introduces compressed air. The airflow enters the connecting pipe through the connecting sleeve; the rotation of the inner tube drives the connecting sleeve and connecting pipe to rotate, giving the milling cutter head a rotary cutting motion. The airflow enters the air outlet along the connecting pipe and is ejected from the side wall of the air outlet, creating a pneumatic cleaning effect at the milling position, blowing away metal debris; the downward angle of the air outlet causes the debris to fall, completing the cleaning of the shielding cover.

[0035] 2. The nested fit between the fixing ring and the limiting ring allows for easy replacement of the connecting ring. The flexible ring material absorbs vibrations transmitted through the connecting pipe, preventing vibrations from being transmitted to the top of the air intake sleeve and affecting the quality of the cutting surface. The slight gap between the fixing ring and the limiting ring allows the top and bottom of the air intake sleeve and connecting pipe of the connecting ring to form a certain angle deflection, thus meeting the requirements of eccentric milling. When the connecting pipe rotates, it drives the ventilation pipe and the spherical base to rotate together. The spherical shape of the spherical base directly fits the milling position of the shield, forming a rounded corner profile. The airflow in the ventilation pipe is ejected from the air outlet. While the spherical base drives the arc-shaped milling cutter to mill the edge of the shield, it also removes metal debris. The arc-shaped cutting edge of the arc-shaped milling cutter naturally guides the debris downwards during rotation, and its arc geometry directly mills out the preset rounded corner shape.

[0036] 3. The sliding frame provides fixed support for the telescopic rod. The movable end of the telescopic rod pushes the moving frame and adjusting assembly to shift, and the guide cover guides the falling debris in the cleaning direction. The adjusting assembly drives the inner support assembly to move, providing internal support fixation for the shielding cover. After the electric belt assembly is started, its rotating part moves the screw downward along the top of the fixed base through the thread. The screw drives the adjusting bracket and contact wheel to press down synchronously. The contact wheel applies a compressive force to the side of the inner support assembly, causing it to deflect, thereby adapting to shielding covers of different diameters and forming internal support to prevent the shielding cover from denting or deforming during processing. The contact wheel presses the side of the spring clip, causing the spring clip to deflect around the fixed axis, pushing the rotating base and inner support column to adhere to the inner wall of the shielding cover and apply support force.

[0037] 4. The rotating ring on the side of the rotating base and the limiting post on the side of the elastic strip form a rotation limit, enabling the rotating base to deflect at an angle and automatically adapt to the internal shape of the shielding cover during the internal support process. The fixed post restricts the lateral displacement of the contact post, preventing relative rotation between the contact post and the inside of the shielding cover during milling. The elastic strip and elastic wheel work together to provide adaptive elastic support for the irregularly shaped shielding cover; the arc-shaped groove on the side of the contact post increases the contact limit with the inner wall of the shielding cover and allows for slight rolling, making the internal support fit more snugly. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the milling fillet device of the present invention;

[0039] Figure 2 This is a schematic diagram of the milling device structure of the present invention;

[0040] Figure 3 This is a schematic diagram of the connecting sleeve structure of the present invention;

[0041] Figure 4 This is a schematic diagram of the milling cutter head structure of the present invention;

[0042] Figure 5 This is a schematic diagram of the fixing device structure of the present invention;

[0043] Figure 6 This is a schematic diagram of the adjusted component structure for the present invention;

[0044] Figure 7 This is a schematic diagram of the internal support component structure of the present invention;

[0045] Figure 8 This is a schematic diagram of the internal support column structure of the present invention.

[0046] In the diagram: 1. Equipment base; 2. Fixing frame; 3. Swing assembly; 4. Milling bracket; 5. Milling device; 6. Fixing device; 501. Connecting pipe; 502. Air outlet; 503. Connecting sleeve; 504. Air inlet sleeve; 505. First motor; 506. Milling cutter head; 5031. Connecting ring; 5032. Flexible ring; 5033. Limiting ring; 5034. Fixing ring; 5061. Ventilation pipe; 5062. Spherical base; 5063. Air outlet; 5064. Arc milling cutter; 601. Sliding frame 602. Telescopic rod; 603. Moving frame; 604. Adjustment assembly; 605. Guide cover; 606. Internal support assembly; 6041. Fixed base; 6042. Screw; 6043. Electric belt assembly; 6044. Adjustment bracket; 6045. Contact wheel; 6061. Rotating base; 6062. Spring bar; 6063. Fixed shaft; 6064. Rotating ring; 6065. Internal support column; 60651. Contact column; 60652. Elastic strip; 60653. Elastic wheel; 60654. Fixed column. Detailed Implementation

[0047] Example 1, please refer to Figures 1-2 This invention provides a technical solution: a processing technology for a circuit breaker corner shield and a milling rounded corner device for processing. The shield is fixed by a fixing device 6. The equipment base 1 supports the bottom of the fixing device 6 and the bottom of the fixing frame 2. The milling bracket 4 is moved by the driving end of the swing component 3. The movement of the milling bracket 4 moves the milling device 5. The milling device 5 is started and enters the interior of the shield to perform milling. The swing component 3 drives the precise milling of specific positions inside the shield, thereby performing rounded corner milling. The internal support setting of the fixing device 6 avoids deformation and dents of the shield during milling. The first motor 505 is started. The drive shaft of the first motor 505 rotates, causing the inner tube of the air intake sleeve 504 to rotate. The outer tube of the air intake sleeve 504 introduces compressed air. The air descends along the connecting sleeve 503 and enters the interior of the connecting pipe 501. The rotation of the inner tube of the air intake sleeve 504 causes the connecting sleeve 503 to rotate, which in turn causes the connecting pipe 501 to rotate. The rotation of the connecting pipe 501 causes the milling cutter head 506 to rotate. The air enters the interior of the air outlet 502 along the connecting pipe 501 and is then ejected along the inner wall of the air outlet 502. During milling, metal chips are pneumatically cleaned, and the downward angle setting facilitates the guidance and descent of the metal chips, thereby cleaning the shielding cover.

[0048] Example 2, please refer to Figures 1-4Based on the first embodiment, the nested arrangement of the fixing ring 5034 and the limiting ring 5033 facilitates the quick replacement of the connecting ring 5031. The flexible ring 5032 absorbs vibrations from the connecting pipe 501, preventing vibrations from being directly transmitted to the top of the air intake sleeve 504 and causing displacement that affects cutting quality. Furthermore, the slight offset between the fixing ring 5034 and the limiting ring 5033 creates a certain angular offset between the top and bottom of the air intake sleeve 504 and the connecting pipe 501, facilitating milling at a certain eccentric angle. The rotation of the connecting pipe 501 drives the ventilation pipe 50... Rotation 61 causes the ventilation duct 5061 to rotate, which in turn drives the spherical base 5062 to rotate. The spherical shape of the spherical base 5062 facilitates the direct generation of rounded corners at the milling position of the shield. The air outlet 5063 causes the air inside the ventilation duct 5061 to be ejected along the air outlet 5063. When the spherical base 5062 drives the arc-shaped milling cutter 5064 to mill the edge of the shield, metal debris is pneumatically cleaned. The arc shape of the arc-shaped milling cutter 5064 guides the metal debris downwards during rotation, and the arc shape of the arc-shaped milling cutter 5064 directly mills out the pre-set rounded corners.

[0049] Example 3, please refer to Figures 1-6 Based on the second embodiment, the sliding frame 601 provides fixed support for the telescopic rod 602. The movable end of the telescopic rod 602 drives the moving frame 603 to move. The movement of the moving frame 603 drives the adjustment component 604 to move. The guide cover 605 guides and cleans the downwardly discharged metal debris. The adjustment component 604 drives the inner support component 606 to move, providing internal support fixation for the shielding cover. The electric belt assembly 6043 is activated. The rotating part of the electric belt assembly 6043 drives the screw 6042 to descend through the thread. The screw 6042 descends along the top of the fixed base 6041. The screw 6042 drives the adjustment bracket 6044 to descend. The descent of the adjustment bracket 6044 drives the contact wheel 6045 to descend. The contact wheel 6045 squeezes and deflects the side of the inner support component 606, thereby providing internal support fixation for shielding covers of different diameters, thus preventing the shielding cover from denting and deformation.

[0050] Example 4, please refer to Figures 1-8Based on the third embodiment, the contact wheel 6045 presses the side of the elastic bar 6062, and the fixed shaft 6063 fixes the elastic bar 6062. The elastic bar 6062 deflects under pressure, causing the rotating base 6061 to move. The movement of the rotating base 6061 causes the inner support column 6065 to support and fix the inner wall side of the shielding cover. The rotating ring 6064 provided on the side of the rotating base 6061 rotates and limits the limit post on the side of the elastic bar 6062, so that the rotating base 6061 has a certain angle deflection effect. When supporting the inside of the shielding cover, it automatically deflects and limits the limit. The fixed column 60654 prevents the side of the contact column 60651 from deflecting from the inside of the shielding cover during milling. The elastic bar 60652 and the elastic wheel 60653 provide adaptive elastic support for the inside of the irregular shielding cover. The arc groove opened on the side of the contact column 60651 increases the rolling of the limit post inside the shielding cover.

[0051] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A process for processing corner shields of circuit breakers and a milling rounded corner device for processing them, characterized in that, include: Process 1: Workpiece clamping and positioning Place the circuit breaker corner shield blank on the internal support positioning fixture and provide radial auxiliary support near the milling area; Process 2: End Milling Start the rounded corner milling equipment, the milling cutter rotates, and the contour feed mechanism drives the milling cutter to mill along the predetermined trajectory of the shield port edge, removing the main excess material of the port edge and forming an arc-shaped flange profile; Step 3: Unloading and Inspection Loosen the internal support positioning clamp and auxiliary support device, remove the finished shielding cover, and perform dimensional inspection and quality inspection.

2. The milling fillet equipment according to claim 1, characterized in that, include: The equipment base is configured as a planar frame structure, and a fixing device is fixedly connected to the top of the equipment base; A fixed frame, wherein the fixed frame is configured as a C-shaped structure, and the fixed end of the swing assembly is fixedly connected to the side of the fixed frame; A milling bracket, wherein the milling bracket is configured as a hollow frame structure, the side of the milling bracket is fixedly connected to the movable end of the swing assembly, and a milling device is fixedly connected to the bottom of the inner wall of the milling bracket, the milling device being positioned above the fixed device; The milling device includes: A connecting pipe, wherein the connecting pipe is configured as a hollow structure, a connecting sleeve is fixedly connected to the top of the connecting pipe, an air inlet sleeve is fixedly connected to the top of the connecting sleeve, a drive shaft of a first motor is fixedly connected to the top of the air inlet sleeve, the bottom of the first motor is fixedly connected to the bottom of the inner wall of the milling bracket, and a milling cutter head is fixedly connected to the bottom of the connecting pipe. The air outlet is configured to face downwards and has a certain tilt angle. The air outlet is located on the side of the connecting pipe and is evenly distributed on the side of the connecting pipe.

3. The milling fillet equipment according to claim 2, characterized in that, The connecting sleeve includes: A connecting ring, wherein the connecting ring is configured as a tapered structure with symmetrical upper and lower sides, and a flexible ring is fixedly connected through and to the side of the connecting ring; A limiting ring is provided, wherein the limiting ring is configured as a ring structure, and a fixing ring is sleeved and fixedly connected to the side of the limiting ring, and the side of the fixing ring is fixedly connected to the side of the inner wall of the connecting pipe.

4. The milling fillet equipment according to claim 2, characterized in that: The milling cutter head includes a ventilation pipe, a spherical base is fixedly connected to the bottom of the ventilation pipe, an air outlet is opened on the inner side of the ventilation pipe, and an arc-shaped milling cutter is fixedly connected to the side of the spherical base.

5. The milling fillet equipment according to claim 4, characterized in that: The arc-shaped milling cutter is configured to conform to the shape of the side of the spherical base, and the arc-shaped milling cutter is configured as a downward-guided arc-shaped strip structure.

6. The milling fillet equipment according to claim 2, characterized in that: The fixing device includes a sliding frame, a fixed end of a telescopic rod is fixedly connected to the bottom of the inner wall of the sliding frame, a movable frame is fixedly connected to the movable end of the telescopic rod, a guide cover is sleeved and fixedly connected to the side of the movable frame, an adjustment component is fixedly connected to the top of the movable frame, a guide cover is fixedly connected to the side of the adjustment component, and an inner support component is fixedly connected to the top of the adjustment component.

7. The milling fillet equipment according to claim 6, characterized in that: The guide cover is configured as an arc-shaped guide structure, and the bottom of the sliding frame is fixedly connected to the top of the equipment base.

8. The milling fillet equipment according to claim 6, characterized in that: The adjustment assembly includes a fixed base, a screw that is slidably connected through the top of the fixed base, a rotating part of an electric belt assembly that is sleeved and threadedly connected to the side of the screw, a fixed part of the electric belt assembly that is fixedly connected to the bottom of the fixed base, an adjustment bracket that is sleeved and rotatably connected to the top of the screw, and a contact wheel that is rotatably connected to the side of the adjustment bracket.

9. The milling fillet equipment according to claim 8, characterized in that: The side of the contact wheel contacts the side of the inner support assembly, the top of the fixed base is provided with a triangular fixed base, the side of the screw is provided with a guide groove, and the side of the contact wheel is provided with a limiting ring structure.

10. The milling fillet equipment according to claim 8, characterized in that: The inner support assembly includes a rotating base, a spring strip is sleeved and rotatably connected to the side of the rotating base, a fixed shaft is fixedly connected to the bottom side of the spring strip, a rotating ring is fixedly connected to the side of the rotating base, a limiting post adapted to the rotating ring is fixedly connected to the side of the spring strip, and an inner support post is penetrating and fixedly connected to the top of the rotating base. The side of the contact wheel contacts the side of the spring bar, and the spring bar is fixedly connected to the top of the fixed base through a fixed shaft; The inner support column includes a contact column, an elastic strip is fixedly connected to the side of the contact column, an elastic wheel is fixedly connected to the inner wall side of the elastic strip, the elastic wheel is sleeved on the side of the contact column and fixedly connected to the side of the contact column, and a fixing column is fixedly connected to the bottom of the contact column. The fixed column passes through the top of the rotating base and is fixedly connected to the top of the rotating base.

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