Mechanical fitting deburring floating chamfering tool device

Abstract

The utility model provides a kind of mechanical accessory deburring floating chamfering cutter device, belong to machining technical field, the mechanical accessory deburring floating chamfering cutter device includes cutter body subassembly, floating adjusting assembly and fixed seat body;Cutter body subassembly includes chamfering cutter edge and handle part, chamfering cutter edge is set in the front end of handle part, the blade edge of chamfering cutter edge is distributed in helical progressive, the rear end of handle part is connected with floating adjusting assembly by spherical articulation structure;Floating adjusting assembly includes elastic buffer cavity and return spring, spherical articulation structure's ball head portion is embedded in the front end ball socket of elastic buffer cavity, the one end of return spring is abutted on the spherical articulation structure of handle part, other end is abutted in the inner wall rear end face of elastic buffer cavity;The utility model can solve the problem that the rigidity contact of existing deburring chamfering machining tool and workpiece is easy to cause tool collapse blade or workpiece surface scratch when meeting hard inclusion or surface mutation, affect processing efficiency and yield.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and specifically relates to a floating chamfering tool device for deburring mechanical parts. Background Technology

[0002] In the field of machinery manufacturing, after various mechanical parts undergo machining processes such as turning, milling, and stamping, their edges often have sharp burrs and sharp corners. These burrs and sharp corners not only affect the assembly accuracy and performance of the parts, but may also scratch operators or damage mating parts during assembly and use. Therefore, deburring and chamfering are essential post-processing steps in the production of mechanical parts. Currently, the deburring and chamfering methods commonly used in industrial production include manual grinding, processing with a dedicated chamfering machine, and processing with fixed chamfering tools. While manual grinding is flexible, it is inefficient and the quality is difficult to guarantee. Dedicated chamfering machines have high investment costs and occupy a large space. Although traditional fixed chamfering tools have a simple structure and low cost, the tool position is completely fixed, resulting in slight undulations or irregular shapes on the machined surface. When machining, the cutting tool cannot adjust to changes in the workpiece surface, resulting in some areas having excessively deep chamfers while others have insufficient chamfers, leading to unstable machining quality. In particular, when the cutting tool encounters hard inclusions or sudden shape changes on the workpiece surface, the instantaneous impact force generated by rigid contact can easily cause the cutting edge to break or the workpiece surface to be scratched, seriously affecting machining efficiency and yield. To solve these problems, some chamfering devices with elastic compensation have emerged in the existing technology. However, these devices are usually complex in structure and contain too many parts, which not only increases manufacturing costs and maintenance difficulty, but also the accumulated clearance between multiple parts affects machining accuracy. Therefore, there is an urgent need for a mechanical accessory deburring floating chamfering tool device that is simple in structure, reasonable in cost, can adapt to changes in the workpiece surface, effectively protect the cutting tool, and stably guarantee machining quality. Utility Model Content

[0003] In view of this, the present invention provides a floating chamfering tool device for deburring mechanical parts, which can solve the problems of existing deburring and chamfering processing devices when processing workpieces with irregular shapes or slight surface undulations. Due to the fixed position of the tool, it cannot adaptively adjust with changes in the workpiece surface, resulting in inconsistent chamfering depth, overcutting in some areas and undercutting in others, and unstable processing quality. At the same time, the rigid contact between the tool and the workpiece is prone to generating impact force when encountering hard inclusions or sudden surface changes, causing tool chipping or workpiece surface scratches, affecting processing efficiency and yield.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a floating chamfering tool device for deburring mechanical parts, including a tool body assembly, a floating adjustment assembly, and a fixed base. The tool body assembly includes a chamfering blade and a handle. The chamfering blade is located at the front end of the handle, and its cutting edge is spirally progressively distributed. The rear end of the handle is connected to the floating adjustment assembly via a spherical hinge structure. The floating adjustment assembly includes an elastic buffer cavity and a return spring. The elastic buffer cavity forms a hollow structure, and the ball head of the spherical hinge structure is embedded in the front ball socket of the elastic buffer cavity. One end of the return spring abuts against the spherical hinge structure of the handle, and the other end abuts against the rear end face of the inner wall of the elastic buffer cavity, providing a restoring force for the tool body assembly. A mounting through hole is provided at the central axis of the fixed base, and the outer circumferential surface of the elastic buffer cavity is fixed to the mounting through hole of the fixed base via a threaded connection.

[0006] The technical advantages of the floating chamfering tool device for deburring mechanical parts provided by this utility model are as follows: The spirally progressive distribution of the chamfering blades in the tool body assembly allows the blades to gradually cut into the workpiece edge during processing, avoiding chipping caused by excessive instantaneous cutting force. Simultaneously, the combination of the spherical hinge structure and the floating adjustment component enables the tool body assembly to adaptively adjust in multiple directions according to the irregular shape of the workpiece surface. The restoring force provided by the return spring ensures that the tool body automatically returns to its initial position after processing. The cavity structure of the elastic buffer chamber provides ample space for the spherical hinge structure. The overall structure is simple, compact, and fully functional, effectively achieving precise deburring and chamfering of the edges of mechanical parts.

[0007] Based on the above technical solution, the deburring floating chamfering knife device for mechanical parts of this utility model can be further improved as follows:

[0008] The helix angle of the chamfered blade ranges from 12° to 18°, and the cone angle formed between the chamfered blade edge and the axis of the handle is from 30° to 45°.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by limiting the range of the helix angle of the chamfering cutting edge and the specific numerical range of the cutting edge cone angle, the cutting edge can ensure both sufficient cutting sharpness and good cutting edge strength during the cutting process. The reasonable setting of the helix angle makes the cutting process smoother and more stable, reducing vibration and noise. The optimized design of the cutting edge cone angle ensures the consistency and aesthetics of the chamfering effect. The synergistic effect of these parameters significantly improves the quality and efficiency of deburring and chamfering, and extends the service life of the tool.

[0010] Furthermore, the diameter of the ball head in the spherical hinge structure is larger than the diameter of the main body section of the handle, and the inner diameter of the ball socket is 0.2 mm to 0.5 mm larger than the diameter of the ball head, in order to form a floating clearance.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the ball head diameter to be larger than the diameter of the main body section of the tool holder, the load-bearing capacity and stability of the spherical hinge structure are enhanced. The precise floating gap set between the inner diameter of the ball socket and the diameter of the ball head allows the tool body assembly to swing freely within a small range during the machining process. This floating gap ensures the flexibility of the tool body while avoiding the decrease in machining accuracy caused by excessive looseness. When there are small protrusions or depressions on the workpiece surface, the tool body can compensate for the angle through the spherical hinge structure, ensuring that the chamfering cutting edge always maintains the best contact state with the edge of the workpiece.

[0012] Furthermore, the rear end face of the inner wall of the elastic buffer cavity is provided with an annular boss structure. The inner diameter of the annular boss structure matches the outer diameter of the return spring to limit the radial displacement of the return spring.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by setting an annular boss structure on the rear end face of the inner wall of the elastic buffer cavity, the radial displacement of the return spring during the working process is effectively limited, preventing the spring from twisting and deforming due to uneven force. The precise matching between the inner diameter of the annular boss and the outer diameter of the return spring makes the compression and extension process of the spring more stable and reliable, ensuring the uniform transmission of the return force. This structural design improves the working stability of the floating adjustment component and reduces the problem of inaccurate return of the tool body component caused by spring offset, thereby ensuring consistency in the continuous processing process.

[0014] Furthermore, a transition section is provided between the spherical hinge structure of the handle and the main body of the handle. The transition section is shaped like a frustum, with the large end of the transition section connecting to the spherical hinge structure and the small end of the transition section connecting to the main body of the handle.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting a frustum-shaped transition section between the spherical hinge structure and the main body of the tool holder, a smooth transition and dispersion of stress is achieved, avoiding stress concentration at the connection point when directly connected. The connection between the large end of the transition section and the spherical hinge structure ensures sufficient connection strength, while the connection between the small end and the main body of the tool holder achieves a smooth change in size. This gradual structural design significantly improves the fatigue resistance and overall service life of the tool holder, and reduces the risk of fracture caused by stress concentration.

[0016] Furthermore, the front end face of the chamfering blade is concave, with a radius of curvature of 8mm to 15mm, and the center point of the concave surface is located on the axis of the chamfering blade.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By designing the front end face of the chamfering blade into a concave arc shape, the blade can form an enveloping cutting action on the edge of the workpiece during cutting. The radius of curvature of the concave arc surface is set within a reasonable range, which not only ensures the effective contact area between the blade and the workpiece but also avoids over-cutting. The design that the center point of the concave arc surface is located on the axis of the chamfering blade ensures the uniform distribution of cutting force along the axial direction. This structure makes the deburring effect more uniform and thorough, and the smoothness and consistency of the chamfered surface are significantly improved, reducing the need for secondary processing.

[0018] Furthermore, the outer circumferential surface of the elastic buffer cavity is provided with several heat dissipation grooves evenly distributed along the circumference. The heat dissipation grooves extend along the axial direction of the elastic buffer cavity, and the depth of the heat dissipation grooves is one-third to one-half of the wall thickness of the elastic buffer cavity.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting heat dissipation grooves evenly distributed along the circumference on the outer peripheral surface of the elastic buffer cavity, the heat dissipation surface area is greatly increased, which effectively improves the heat dissipation efficiency of the device during continuous processing. The design of the heat dissipation grooves extending along the axial direction forms a good heat dissipation channel, which enables the heat generated during processing to be quickly conducted and dissipated into the environment. The reasonable setting of the depth of the heat dissipation grooves not only ensures the heat dissipation effect but also maintains the structural strength of the elastic buffer cavity, effectively preventing the decline in tool performance and dimensional changes caused by excessive temperature, and ensuring the stability of processing accuracy.

[0020] Furthermore, the outer peripheral surface of the fixing body is hexagonal prism-shaped, and the rear end face of the fixing body is provided with a positioning flange, the outer diameter of which is greater than the distance between opposite sides of the hexagon of the fixing body.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by designing the outer peripheral surface of the fixed base as a hexagonal prism, a reliable anti-rotation structure is provided for the installation and disassembly process, which facilitates the use of tools such as wrenches for tightening operations. The design that the outer diameter of the positioning flange on the rear end face is larger than the distance between opposite sides of the hexagon ensures that the fixed base can form a clear axial positioning when installed on the machine tool or fixture, preventing axial movement of the device during operation. This structural design simplifies the installation process and improves the stability of the device during high-speed machining, ensuring the safety and reliability of the machining process.

[0022] Furthermore, the chamfered cutting edge of the blade assembly is made of cemented carbide, the elastic buffer cavity of the floating adjustment assembly is made of tool steel, and the fixed base is made of carbon structural steel.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by selecting appropriate materials for different components, the performance of each component is optimized and matched. The chamfering blade is made of cemented carbide material to ensure excellent wear resistance and cutting performance. The elastic buffer cavity is made of tool steel material to take into account both strength and toughness requirements. The fixed base is made of carbon structural steel material to reduce manufacturing costs while meeting strength requirements. The reasonable combination of the three materials makes the whole device have good economy and durability while ensuring processing quality, and extends the overall service life of the device.

[0024] Furthermore, the effective number of turns of the return spring is 5 to 8, the ratio of the spring wire diameter to the inner cavity diameter of the elastic buffer cavity is 1:8 to 1:12, and the depth of the ball socket is one-half to three-fifths of the diameter of the ball head.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By limiting the effective number of coils of the return spring, the ratio of the spring wire diameter to the inner diameter of the cavity, and the ratio of the ball socket depth to the ball head diameter, precise matching between the components of the floating adjustment assembly is achieved. The setting of the effective number of coils of the return spring ensures an appropriate elastic coefficient and restoring force. The optimization of the ratio of the spring wire diameter to the inner diameter of the cavity allows the spring to have sufficient room for movement in the cavity while avoiding excessive shaking. The precise control of the ratio of the ball socket depth to the ball head diameter ensures that the spherical hinge structure does not fall out of the ball socket while maintaining flexible floating. The synergistic optimization of these dimensional relationships enables the floating performance of the entire device to reach the best state, significantly improving the adaptability to workpieces of different shapes.

[0026] Compared with existing technologies, the beneficial effects of the floating chamfering tool device for deburring mechanical parts provided by this utility model are as follows: Through the combined design of the tool body assembly and the floating adjustment assembly, a flexible processing system capable of adapting to changes in the surface morphology of the workpiece is established. The spherical hinge structure gives the tool body assembly multi-degree-of-freedom floating capability, enabling the chamfering blade to always maintain optimal contact with the edge of the workpiece. Regardless of changes in the workpiece surface, a uniform chamfering effect can be achieved. The elastic buffering effect provided by the return spring effectively absorbs the impact force during processing, significantly reducing the risk of tool chipping and workpiece surface scratches. The spiral progressive distribution of the blade design makes the cutting process smoother and more stable, reducing vibration and noise and extending the tool life. The heat dissipation groove design of the elastic buffer cavity ensures thermal stability during continuous processing. The hexagonal structure and positioning flange of the fixed base simplify the installation and adjustment process. The overall structure is compact and reasonable, and the size matching between each component has been carefully optimized, achieving high-efficiency, high-quality, and high-stability deburring and chamfering processing of mechanical parts. Compared with existing technologies, it has significant improvements in processing consistency, tool life, and application range, and is particularly suitable for the edge processing needs of precision mechanical parts in mass production. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a floating chamfering tool device for deburring mechanical parts;

[0029] Figure 2 This is a schematic diagram of the assembly of a floating chamfering tool device for deburring mechanical parts.

[0030] Figure 3 A schematic diagram of the blade body assembly of a floating chamfering tool device for deburring mechanical parts;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Blade body assembly; 11. Floating adjustment assembly; 12. Fixed base; 13. Chamfered blade; 14. Blade handle; 15. Elastic buffer cavity; 16. Return spring; 17. Spherical hinge structure; 18. Annular boss structure; 19. Transition section; 20. Heat dissipation groove; 21. Positioning flange. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows a first embodiment of a floating chamfering tool device for deburring mechanical parts provided by this utility model. In this embodiment, it includes a tool body assembly 10, a floating adjustment assembly 11, and a fixed base 12. The tool body assembly includes a chamfering blade 13 and a handle 14. The chamfering blade is located at the front end of the handle, and the cutting edge of the chamfering blade is distributed in a spiral progressive manner. The rear end of the handle is connected to the floating adjustment assembly through a spherical hinge structure 17. The floating adjustment assembly includes an elastic buffer cavity 15 and a return spring 16. The elastic buffer cavity forms a hollow structure inside. The ball head of the spherical hinge structure is embedded in the ball socket at the front end of the elastic buffer cavity. One end of the return spring abuts against the spherical hinge structure of the handle, and the other end of the return spring abuts against the rear end face of the inner wall of the elastic buffer cavity to provide a restoring force for the tool body assembly. A mounting through hole is opened at the central axis position of the fixed base, and the outer peripheral surface of the elastic buffer cavity is fixed in the mounting through hole of the fixed base by a threaded connection.

[0035] In the above technical solution, the helix angle of the chamfered blade is in the range of 12°~18°, and the cone angle formed between the chamfered blade edge and the axis of the handle is 30°~45°.

[0036] Furthermore, in the above technical solution, the diameter of the ball head of the spherical hinge structure is larger than the diameter of the main body section of the handle, and the inner diameter of the ball socket is 0.2 mm to 0.5 mm larger than the diameter of the ball head, in order to form a floating gap.

[0037] Furthermore, in the above technical solution, the rear end face of the inner wall of the elastic buffer cavity is provided with an annular boss structure 18, the inner diameter of the annular boss structure is matched with the outer diameter of the return spring, and is used to limit the radial displacement of the return spring.

[0038] Furthermore, in the above technical solution, a transition section 19 is provided between the spherical hinge structure of the handle and the main body section of the handle. The transition section is shaped like a frustum, with the large end of the transition section connected to the spherical hinge structure and the small end of the transition section connected to the main body section of the handle.

[0039] Furthermore, in the above technical solution, the front end face of the chamfering blade is in the shape of a concave arc surface, the radius of curvature of the concave arc surface is 8mm~15mm, and the center point of the concave arc surface is located on the axis of the chamfering blade.

[0040] Furthermore, in the above technical solution, the outer peripheral surface of the elastic buffer cavity is provided with a number of heat dissipation grooves 20 evenly distributed along the circumference. The heat dissipation grooves extend along the axial direction of the elastic buffer cavity, and the depth of the heat dissipation grooves is one-third to one-half of the wall thickness of the elastic buffer cavity.

[0041] Furthermore, in the above technical solution, the outer peripheral surface of the fixed base is hexagonal prism-shaped, and the rear end face of the fixed base is provided with a positioning flange 21, the outer diameter of which is greater than the distance between opposite sides of the hexagon of the fixed base.

[0042] Furthermore, in the above technical solution, the chamfered cutting edge of the blade assembly is made of cemented carbide, the elastic buffer cavity of the floating adjustment assembly is made of tool steel, and the fixed base is made of carbon structural steel.

[0043] Furthermore, in the above technical solution, the effective number of turns of the reset spring is 5 to 8, the ratio of the spring wire diameter of the reset spring to the inner cavity diameter of the elastic buffer cavity is 1:8 to 1:12, and the depth of the ball socket is one-half to three-fifths of the diameter of the ball head.

[0044] The method of using this utility model is as follows: First, clamp the fixed base with a wrench using its hexagonal shape. Then, screw the threaded part of the fixed base into the mounting hole of the machine tool spindle or special fixture, tightening it until the positioning flange is tightly fitted to the mounting surface, ensuring that the device is firmly installed and the axis is aligned with the axis of the spindle or fixture. After installation, check the floating flexibility of the tool body assembly. Gently push the tool holder by hand; the tool body assembly should be able to swing freely within the spherical hinge structure and automatically return to the center position under the action of the return spring after releasing the hand. Fix the mechanical parts to be processed on the worktable or fixture, adjust the workpiece position so that its edge is aligned with the chamfering cutting edge, start the machine tool spindle to rotate the device, and slowly feed the material so that the chamfering cutting edge approaches the edge of the workpiece. When the cutting edge contacts the workpiece, a slight resistance will be felt. At this time, the tool body assembly begins to feed through the spherical hinge structure under the action of the reaction force on the workpiece surface. Fine-tune the feed to adapt to the actual shape of the workpiece surface, continue feeding to the predetermined chamfer depth, maintain a uniform and stable feed speed, and move along the edge of the workpiece to complete the deburring and chamfering of the entire edge. If small protrusions or hard inclusions are encountered on the workpiece surface during processing, the tool assembly will automatically float to avoid them. The buffering effect of the return spring absorbs the impact energy and protects the cutting edge from damage. After processing, retract the tool, and the tool assembly will automatically return to the initial position under the action of the return spring. Check the processing quality. If it is qualified, continue processing the next workpiece. When using continuously for a long time, pay attention to the temperature of the device. The heat dissipation groove of the elastic buffer cavity will dissipate heat naturally. If necessary, use compressed air to assist in cooling. Regularly check whether the elasticity of the return spring is normal, whether the floating clearance of the spherical hinge structure is appropriate, and whether the chamfering cutting edge is worn. Perform maintenance or replace worn parts as necessary.

[0045] The following is a specific embodiment 1 of this utility model: In this embodiment, the chamfering blade of the deburring floating chamfering tool device is made of tungsten-cobalt cemented carbide material YG8. This material has good wear resistance and red hardness. The cutting edge of the chamfering blade is precision ground to a surface roughness of 0.4μm, resulting in high sharpness. The chamfering blade is distributed in a spiral progressive pattern with a spiral angle of 15°. The cone angle formed between the cutting edge and the axis of the handle is 38°. This angle design ensures that the blade maintains both sharpness and sufficient strength during cutting. The handle is made of 40Cr alloy structural steel and has undergone tempering treatment to achieve a hardness of HRC28~32. The diameter of the main body section of the handle is 12 mm. The ball joint has a diameter of 18 mm and a length of 45 mm. The ball head of the spherical hinge structure is polished to a surface roughness of 0.8 μm. The ball head is connected to the main body of the tool holder via a frustoconical transition section with a length of 8 mm and a cone angle of 60°. The elastic buffer cavity of the floating adjustment component is made of T10A tool steel, hardened and tempered to a hardness of HRC45~50. The outer diameter of the elastic buffer cavity is 35 mm, and the total length is 68 mm. A ball socket is machined at the front end of the internal cavity, with an inner diameter of 18.3 mm and a depth of 10 mm. The inner surface of the ball socket is precision honed to a surface roughness of 0.4 μm, forming a 0.3 mm floating gap with the ball head. The rear end face of the inner wall of the elastic buffer cavity is designed with… It features an annular boss with a height of 3 mm, an inner diameter of 16 mm, and an outer diameter of 24 mm (the same as the inner diameter of the cavity). The return spring is made of 60Si2Mn spring steel wire with an outer diameter of 15 mm, a wire diameter of 2 mm, 6 effective turns, a free length of 40 mm, and a stiffness coefficient of 8 N / mm. One end of the return spring abuts against the rear annular step of the spherical hinge structure, and the other end abuts against the end face of the annular boss. The pre-compression is 5 mm, providing a preload of 40 N. Eight heat dissipation grooves are evenly distributed circumferentially on the outer circumferential surface of the elastic buffer cavity. Each groove is 4 mm wide, 2.5 mm deep, and 50 mm long, with a rounded bottom. The external thread of the elastic buffer cavity is M35 x 1.5, with a thread length of... The fixed base is made of 45# carbon structural steel and has undergone normalizing treatment. It is a regular hexagon with a side-to-side distance of 50mm and a height of 35mm. The central mounting hole has an M35 internal thread. The outer diameter of the locating flange on the rear face is 65mm, and the thickness is 5mm. There is a 3mm step height between the front face of the locating flange and the rear face of the fixed base. In use, the elastic buffer cavity is screwed into the mounting hole of the fixed base and tightened until the end face of the elastic buffer cavity is flush with the front face of the fixed base. Then, the entire device is installed in the ER32 spring collet of the CNC milling machine, clamping the hexagonal part of the fixed base. The spindle speed is set to 1200 rpm, the feed rate to 100mm / min, and the chamfer depth to 0.This 5mm chamfering tool is used for machining the edges of aluminum alloy mechanical parts. During machining, the helical, progressive cutting motion of the chamfering edge ensures a smooth cutting process. The tool body assembly automatically adjusts its angle to the slight undulations of the workpiece surface via a spherical hinge structure. The return spring effectively absorbs cutting impacts, resulting in a smooth, uniform chamfered surface with good dimensional consistency and even tool wear. Even after machining 200 workpieces continuously, the cutting edge maintains good cutting performance. The heat dissipation grooves provide significant cooling, keeping the device temperature stable at around 45℃ during machining. The entire device operates stably and reliably, producing consistent machining quality.

[0046] The following is another specific embodiment 2 of this utility model: This embodiment is based on embodiment 1, with the helix angle of the chamfering blade adjusted to 12° and the cone angle of the cutting edge adjusted to 32°. This parameter adjustment makes the blade more suitable for machining stainless steel mechanical parts. Stainless steel has high hardness and is prone to work hardening during cutting. The smaller helix angle and cone angle can enhance the strength of the blade and reduce the risk of chipping. At the same time, the stiffness coefficient of the return spring is increased to 12N / mm, the pre-compression is increased to 8mm, and a preload force of 96N is provided. The larger preload force allows the blade to maintain a more stable contact pressure with the workpiece, adapting to the greater cutting resistance of stainless steel. The spindle speed is reduced to 800 rpm, the feed rate is reduced to 60mm / min, and the chamfer depth is maintained at 0.5mm. The floating adjustment function of the tool body assembly is still effective during the machining process, which can adapt to the small changes on the surface of the stainless steel workpiece. The higher stiffness of the return spring provides better support force, the machined surface quality is good, and the tool life meets production requirements.

[0047] Specifically, the principle of this invention is as follows: a multi-degree-of-freedom connection between the tool body assembly and the floating adjustment assembly is established through a spherical hinge structure. When the chamfering blade contacts the edge of the workpiece and begins cutting, the slight undulations or shape changes on the workpiece surface will generate forces in different directions on the blade. Due to the floating gap in the ball joint of the spherical hinge structure, these forces can drive the tool body assembly to swing around the center of the ball at a slight angle, thereby achieving adaptive contact between the blade and the workpiece surface. The return spring plays a dual role in this process. On the one hand, it provides a forward preload to the tool body assembly, ensuring that the blade and the workpiece maintain appropriate contact pressure. On the other hand, its elastic characteristics can absorb the impact energy during processing. When the blade encounters hard inclusions or sudden shape changes, the impact force is transmitted to the return spring through the spherical hinge structure. The compression deformation of the spring converts the impact energy into elastic potential energy and stores it, avoiding direct energy action on the blade and causing damage. The chamfering blade adopts a spiral gradual... The progressive design ensures that the contact between the cutting edge and the workpiece is gradual rather than instantaneous. This progressive cutting significantly reduces instantaneous cutting force, vibration, and noise. The concave arc shape at the tip of the cutting edge makes the cutting action envelope-like, ensuring the uniformity and smoothness of the chamfered surface. The cavity structure of the elastic buffer chamber provides ample space for the spherical hinge structure, while the heat dissipation grooves on its outer periphery enhance heat conduction and dissipation, ensuring the thermal stability of the device under continuous high-load operation. The fixed base securely mounts the entire device to the machine tool spindle or fixture via a threaded connection. The hexagonal shape and positioning flange design ensure the accuracy and stability of the installation. The entire working process of the device is a dynamic balancing process. The cutting tool assembly finds a balance point between the force of the return spring and the reaction force of the workpiece. The floating adjustment of the spherical hinge structure enables real-time tracking of changes in the workpiece surface, thereby achieving a stable and reliable deburring and chamfering effect.

Claims

1. A floating chamfering tool device for deburring mechanical parts, comprising a tool body assembly, a floating adjustment assembly, and a fixed base; characterized in that, The blade assembly includes a chamfered cutting edge and a handle. The chamfered cutting edge is located at the front end of the handle, and the cutting edge of the chamfered cutting edge is distributed in a spiral progressive manner. The rear end of the handle is connected to the floating adjustment assembly through a spherical hinge structure. The floating adjustment assembly includes an elastic buffer cavity and a return spring. The elastic buffer cavity forms a hollow structure inside. The ball head of the spherical hinge structure is embedded in the ball socket at the front end of the elastic buffer cavity. One end of the return spring abuts against the spherical hinge structure of the handle, and the other end of the return spring abuts against the rear end face of the inner wall of the elastic buffer cavity, which is used to provide restoring force for the blade assembly. A mounting through hole is opened at the central axis position of the fixed base. The outer peripheral surface of the elastic buffer cavity is fixed in the mounting through hole of the fixed base by a threaded connection.

2. The floating chamfering tool device for deburring mechanical parts according to claim 1, characterized in that, The helix angle of the chamfered blade ranges from 12° to 18°, and the cone angle formed between the chamfered blade edge and the axis of the handle is 30° to 45°.

3. The floating chamfering tool device for deburring mechanical parts according to claim 2, characterized in that, The diameter of the ball head in the spherical hinge structure is larger than the diameter of the main body section of the handle, and the inner diameter of the ball socket is 0.2 mm to 0.5 mm larger than the diameter of the ball head, which is used to form a floating clearance.

4. The floating chamfering tool device for deburring mechanical parts according to claim 3, characterized in that, The rear end face of the inner wall of the elastic buffer cavity is provided with an annular boss structure. The inner diameter of the annular boss structure matches the outer diameter of the return spring to limit the radial displacement of the return spring.

5. The floating chamfering tool device for deburring mechanical parts according to claim 4, characterized in that, A transition section is provided between the spherical hinge structure of the handle and the main body of the handle. The transition section is shaped like a frustum. The large end of the transition section is connected to the spherical hinge structure, and the small end of the transition section is connected to the main body of the handle.

6. The floating chamfering tool device for deburring mechanical parts according to claim 5, characterized in that, The front end face of the chamfering blade is concave, with a radius of curvature of 8mm to 15mm. The center point of the concave surface is located on the axis of the chamfering blade.

7. A floating chamfering tool device for deburring mechanical parts according to claim 6, characterized in that, The outer circumferential surface of the elastic buffer cavity is provided with several heat dissipation grooves evenly distributed along the circumference. The heat dissipation grooves extend along the axial direction of the elastic buffer cavity, and the depth of the heat dissipation grooves is one-third to one-half of the wall thickness of the elastic buffer cavity.

8. The floating chamfering tool device for deburring mechanical parts according to claim 7, characterized in that, The outer circumference of the fixed base is hexagonal prism-shaped, and the rear end face of the fixed base is provided with a positioning flange. The outer diameter of the positioning flange is greater than the distance between opposite sides of the hexagon of the fixed base.

9. A floating chamfering tool device for deburring mechanical parts according to claim 8, characterized in that, The chamfered cutting edge of the blade assembly is made of cemented carbide, the elastic buffer cavity of the floating adjustment assembly is made of tool steel, and the fixed base is made of carbon structural steel.

10. A floating chamfering tool device for deburring mechanical parts according to claim 9, characterized in that, The effective number of turns of the return spring is 5 to 8. The ratio of the spring wire diameter to the inner cavity diameter of the elastic buffer cavity is 1:8 to 1:

12. The depth of the ball socket is one-half to three-fifths of the diameter of the ball head.

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