Special-shaped annular groove sharp edge protection tool

Abstract

The utility model discloses a kind of special-shaped annular groove sharp edge protection tool, including filling part and protection part;Protection part is located above filling part and both adopt integrated structure;Filling part adopts the profiling structure compatible with the special-shaped annular groove of workpiece or the ring wall structure of workpiece edge, it is correspondingly set in the special-shaped annular groove in the middle of workpiece or on the ring wall structure of workpiece edge and closely adheres to, to respectively realize the protection of the sharp angle of special-shaped annular groove slot edge in the middle of workpiece or workpiece edge special-shaped annular groove slot edge sharp angle;And the edge of filling part and protection part junction is flush with the slot edge of special-shaped annular groove;Protection part is located outside special-shaped annular groove, and completely covers the sharp angle of slot edge on both sides of special-shaped annular groove in the middle of workpiece, or the sharp angle of slot edge on one side of workpiece edge special-shaped annular groove.The sharp edge protection tool can realize the comprehensive protection of the sharp angle of special-shaped annular groove slot edge of workpiece in the polishing and deburring processing process of workpiece sandblasting, water jet, roll grinding etc.

Description

Technical Field

[0001] This utility model belongs to the field of precision machining technology such as sandblasting, water jetting, and tumbling, and specifically relates to a tooling for protecting the sharp edge of an irregularly shaped annular groove. Background Technology

[0002] Sandblasting, water jetting, and tumbling techniques utilize high-speed jetting of abrasive / water abrasive to create a strong impact on the surface of a workpiece, or immerse the part in abrasive grains. Through mechanical means, the surface of the part moves with the abrasive grains, thoroughly removing burrs, tool marks, steps, rough objects, coatings, and other adhering substances from the surface of the part. These techniques can be applied to the surface polishing and deburring of workpieces made of various materials, including metals, plastics, glass, and ceramics, and have a very wide range of applications.

[0003] However, for certain sealing components with irregularly shaped annular groove structures, when used as sealing components, the sharpness of the edges of these grooves is often extremely critical. Sealing components typically achieve their sealing function through the sharp edges of their grooves, and the radius of curvature of these sharp edges is crucial. R The diameter is typically less than 0.03 mm, sometimes even reaching 0.005~0.01 mm. During the surface polishing and deburring of sealing components with irregularly shaped annular grooves using sandblasting, waterjeting, and tumbling, the impact or friction of the abrasive grains can cause chamfering, erosion damage, or even chipping of the small groove edges and sharp corners, severely affecting the subsequent sealing performance and safety of the sealing component. In engineering, manual grinding is often used to solve this problem, but manual grinding has adverse effects on the stability, reliability, and batch processing efficiency of annular grooves, especially irregularly shaped ones. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a tooling for protecting the sharp edges of an irregularly shaped annular groove. The technical problem to be solved by this utility model is achieved through the following technical solution: A protective fixture for the sharp edges of an irregularly shaped annular groove is used during sandblasting, waterjet polishing, and deburring processes. It is installed within the irregularly shaped annular groove of a workpiece to protect the sharp corners of the groove edges. The fixture includes a filling part and a protective part; the protective part is located above the filling part, and both are integrally formed. The filling part adopts a contoured structure adapted to the irregular annular groove of the workpiece or the annular wall structure of the workpiece edge. It is correspondingly set in the irregular annular groove in the middle of the workpiece or on the annular wall structure of the workpiece edge, and fits tightly to protect the sharp corner of the groove edge of the irregular annular groove in the middle of the workpiece or the sharp corner of the groove edge of the irregular annular groove on the workpiece edge, respectively. Moreover, the edge of the filling part connecting with the protection part is flush with the groove edge of the irregular annular groove. The protective part is located outside the irregular annular groove and completely covers the sharp corners of the groove edges on both sides of the irregular annular groove in the middle of the workpiece, or the sharp corners of the groove edges on one side of the irregular annular groove at the edge of the workpiece; and the height of the protective part beyond the groove edge of the irregular annular groove is in the range of 1mm~5mm.

[0005] In one embodiment of this utility model, the width of the protective part extending beyond the sharp corner of the groove in the horizontal direction is 0.05mm to 0.5mm.

[0006] In one embodiment of this utility model, the filling part and the protective part are integrally formed by injection molding, machining, or 3D printing to obtain a contoured structure that adapts to the irregularly shaped annular groove; wherein, The filling part and the protective part are made of polymer materials, including one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene or polyethylene terephthalate.

[0007] In one embodiment of this utility model, when protecting the sharp corner of the irregular annular groove in the middle of the workpiece, a metal or plastic annular ring is used to tighten the outer ring of the protective part around the circumference of the filling part by using screws or cable ties to apply a fastening pressure to the irregular annular groove sharp corner protection fixture along the first circumferential direction, thereby achieving the fastening of the workpiece and the irregular annular groove sharp corner protection fixture.

[0008] In one embodiment of this utility model, when protecting the sharp corner of the irregular annular groove edge of the workpiece, a metal or plastic annular ring is used to tighten the outer ring of the protective part around the circumference of the filling part with screws or cable ties to apply a fastening pressure to the irregular annular groove edge protection fixture in the first radial direction; at the same time, a clamp or chuck is used on the outside of the filling part to apply a fastening pressure to the irregular annular groove edge protection fixture in the second direction, thereby achieving the fastening of the workpiece and the irregular annular groove edge protection fixture.

[0009] In one embodiment of this utility model, the materials used for the filling part and the protective part also include inorganic magnetic particles to form a composite magnetic polymer material irregular annular groove edge protection tooling, which is adapted to be fastened by magnetic attraction.

[0010] In one embodiment of this utility model, the irregular annular groove tip protection tooling is fastened to the workpiece by adhesive bonding; the adhesive includes epoxy resin adhesive, polyurethane adhesive or acrylic adhesive.

[0011] The beneficial effects of this utility model are: This utility model of a tooling for protecting the sharp edges of irregularly shaped annular grooves includes a filling part and a protective part. The protective part is located above the filling part, and the two are integrally formed. The filling part adopts a contoured structure adapted to the irregularly shaped annular groove of the workpiece or the annular wall structure of the workpiece edge. It is correspondingly set in the irregularly shaped annular groove in the middle of the workpiece or on the annular wall structure of the workpiece edge, and is tightly attached by means of threads, narrow strips, magnetic attraction, or adhesive to protect the sharp edges of the irregularly shaped annular groove in the middle of the workpiece or the irregularly shaped annular groove on the edge of the workpiece. The edge where the filling part and the protective part meet is flush with the groove edge of the irregularly shaped annular groove. The protective part is located outside the irregularly shaped annular groove and completely covers the sharp edges of the groove on both sides of the irregularly shaped annular groove in the middle of the workpiece, or the sharp edges of the groove on one side of the irregularly shaped annular groove on the edge of the workpiece. This tooling for protecting the sharp edges of irregularly shaped annular grooves provides comprehensive protection for the sharp corners of the grooves during sandblasting, waterjeting, tumbling, polishing, and deburring processes. It prevents abrasive impacts or friction from causing chamfering, erosion, or even chipping of the delicate groove edges, which can severely affect the sealing performance and safety of the sealing assembly. It also solves the problems of stability, reliability, and batch processing efficiency in manual grinding of annular grooves, especially irregularly shaped ones.

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] Figure 1 A schematic diagram of the structure of an irregularly shaped annular groove edge protection tool provided in an embodiment of this utility model; Figure 2 A schematic diagram illustrating the installation of an irregularly shaped annular groove edge protection fixture for protecting the irregularly shaped annular groove in the middle of a workpiece, provided for an embodiment of this utility model. Figure 3 This is a schematic diagram illustrating the installation of an irregularly shaped annular groove edge protection fixture for protecting the edge of an irregularly shaped annular groove on a workpiece, as provided in this embodiment of the utility model.

[0014] Explanation of reference numerals in the attached drawings: 10 - filling part; 20 - protective part. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides a protective fixture for the sharp edges of an irregularly shaped annular groove. It is installed within the irregularly shaped annular groove of a workpiece during sandblasting, waterjeting, or tumbling polishing deburring processes to protect the sharp corners of the groove edges. Please refer to [link to related documentation]. Figure 1 , Figure 1 This is a schematic diagram of the structure of an irregularly shaped annular groove edge protection tooling provided in an embodiment of the present invention. The irregularly shaped annular groove edge protection tooling includes a filling part 10 and a protective part 20; the protective part 20 is located above the filling part 10, and the two are integrally formed; wherein, The filling part 10 adopts a contoured structure adapted to the irregular annular groove of the workpiece or the annular wall structure of the workpiece edge. It is correspondingly set in the irregular annular groove in the middle of the workpiece or on the annular wall structure of the workpiece edge, and fits tightly to protect the sharp corner of the groove edge of the irregular annular groove in the middle of the workpiece or the sharp corner of the groove edge of the irregular annular groove on the edge of the workpiece, respectively. Moreover, the edge of the filling part 10 and the protection part 20 is flush with the groove edge of the irregular annular groove. The protective part 20 is located outside the irregular annular groove and completely covers the groove edge sharp corners on both sides of the irregular annular groove in the middle of the workpiece, or the groove edge sharp corners on one side of the irregular annular groove at the edge of the workpiece; and the height of the protective part 20 exceeding the groove edge of the irregular annular groove is 1mm to 5mm.

[0017] The irregular annular groove edge protection fixture provided in this embodiment can be installed in the irregular annular groove of the workpiece during sandblasting, water jetting, tumbling polishing and deburring processes to protect the sharp corners of the groove edges. In particular, for the sharp corners of the irregular annular groove edges of sealing components, it can prevent the impact force of abrasive grains during sandblasting from causing chamfering, erosion or even destructive damage to the sharp corners of the groove edges, greatly improving the subsequent sealing performance and safety of the sealing components.

[0018] It should be noted that in the description of this embodiment, the irregular annular groove tip protection tooling is also simply referred to as tooling, and the workpiece specifically refers to the sealing assembly.

[0019] As one implementation method, please refer to Figure 2 , Figure 2 This is a schematic diagram illustrating the installation of the irregular annular groove edge protection fixture provided in this embodiment of the invention, which protects the irregular annular groove in the middle of a workpiece. This installation method is mainly used to protect the sharp corners of the irregular annular groove edge in the middle of the workpiece. Figure 2 As shown, the workpiece has irregularly shaped annular grooves A, B, and C in the middle; when an irregularly shaped annular groove sharp edge protection fixture is added to irregularly shaped annular grooves A and C, the coating of irregularly shaped annular groove B can be removed by sandblasting.

[0020] Specifically, the protective fixture for the sharp edges of the irregularly shaped annular grooves A and C, added within these grooves, has a filling part 10 that adopts a contoured structure adapted to the irregularly shaped annular grooves A and C, tightly fitting inside them. Its edge, where it connects with the protective part 20, is flush with the groove edge of the irregularly shaped annular groove. The protective part 20 is located outside the irregularly shaped annular grooves A and C, completely covering the sharp corners of the groove edges on both sides of the irregularly shaped annular groove B. The protective part 20 extends beyond the groove edge of the irregularly shaped annular groove by a certain height d, such as... Figure 1 As shown, this can protect the sharp corners of the groove edges on both sides of the irregular annular groove B from being chamfered. Similarly, for a sealing assembly with multiple irregular annular grooves, when processing a certain groove, filler blocks can be installed on the two adjacent grooves to avoid chamfering of the sharp corners of the groove edges when sandblasting to remove the coating from the groove.

[0021] Generally, the height d of the protective part 20 exceeding the sharp corner of the irregular annular groove is in the range of 2mm to 5mm. The reason for this setting is that when the height exceeds the height d of the irregular annular groove edge of the workpiece too much, the depth of the irregular annular groove of the workpiece is equivalently increased, which will weaken the movement speed and impact kinetic energy of the sandblasting particles reaching the bottom of the irregular annular groove, reduce the removal efficiency of the coating at the bottom of the irregular annular groove, or even make it impossible to remove it completely; while when the height d of the protective part 20 exceeds the edge of the irregular annular groove of the sealing component too little, the filling block will deform under the impact of the sandblasting particles, and the top of the protective part 20 will easily form a gap with the edge of the irregular annular groove, so that the sandblasting enters the gap and causes wear and chamfering to the sharp corner of the irregular annular groove edge of the sealing component, thus failing to reliably protect the sharp corner of the irregular annular groove edge of the workpiece.

[0022] For further details, please continue to see Figure 2 The width of the protective part 20 extending beyond the sharp corner of the groove in the horizontal direction is generally taken as 0.05mm to 0.5mm. That is, the excess width of the protective part 20 in the horizontal direction is b + (0.05mm to 0.5mm), where b is the width of the sharp corner of the irregular annular groove. This design is because the irregular annular groove has dimensional tolerances during processing. Setting a positive tolerance of 0.05mm to 0.5mm as the maximum range of dimensional tolerances for the irregular annular groove can prevent the filling block from completely covering the sharp corner of the groove.

[0023] Optionally, as an implementation method, the filling part 10 and the protective part 20 of the irregular annular groove edge protection tooling provided in this embodiment are integrally formed by injection molding, machining or 3D printing to obtain a contoured structure that fits the irregular annular groove; the filling part 10 and the protective part 20 are preferably integrally formed by 3D printing to obtain a structure that fits the irregular annular groove; wherein, the material of the filling part 10 and the protective part 20 is a polymer material, including one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene or polyethylene terephthalate.

[0024] Understandably, since the filling part 10 of the irregular annular groove edge protection tooling adopts a contour-following structure adapted to the irregular annular groove of the workpiece, it is applicable to irregular annular grooves such as dovetail grooves, triangular grooves, trapezoidal grooves, and even irregular curved surfaces. 3D printing technology, which facilitates rapid one-piece molding of complex irregular structures, is preferred for realizing the corresponding irregular annular groove edge protection tooling. For regular-shaped irregular annular grooves, injection molding, machining, or 3D printing can all be used to manufacture the irregular annular groove edge protection tooling.

[0025] Furthermore, regarding the material for the protective tooling for the pointed edge of the irregular annular groove, this embodiment preferably uses a polymer material as the material for the protective tooling for the pointed edge of the irregular annular groove. This is mainly because polymer materials are elastic materials, and during installation and fastening, they can be tightly fitted to the material surface through their own elastic deformation, maintaining rigidity and sealing, and increasing reliability during use.

[0026] Specifically, the elastic modulus range of the polymer material selected in this embodiment should be controlled between 2000MPa and 10000MPa. The reason is that if the elastic modulus of the polymer material is too high, it will be difficult for the filling part 10 to achieve seamless and tight bonding with the material surface through fastening. At the same time, the elastic modulus of the tooling block should not be too small. If the elastic modulus is too small, it will easily deform under the impact and friction of abrasive particles from sandblasting, water jetting and rolling, resulting in a seamless and tight bonding.

[0027] In addition, the toughness of the material should also be controlled at an impact toughness value of 40. 160k The reason is that when the toughness is too small, the protective part 20 of the irregular annular groove edge at the top of the filling part is easily damaged or even broken by the impact and friction of abrasive particles in sandblasting, water jetting and tumbling, thus failing to achieve effective protection; while when the toughness is too large, the increase in its rigidity makes it difficult for the filling part 10 to achieve a seamless and tight fit with the material surface through fastening.

[0028] Preferably, in this embodiment, when using 3D printing to form the irregularly shaped annular groove edge protection tooling, a polymer material with a high coefficient of thermal expansion, such as polyethylene, polypropylene, and polyvinyl chloride, is preferred. The tooling is filled and secured to the irregularly shaped annular groove of the workpiece at a low temperature T1, and then sandblasted, water-jet-washed, or tumbling at a higher ambient temperature T2. At T2, the tooling filling part 10 expands thermally, promoting a tight fit with the irregularly shaped annular groove. Engineering tests have shown that to achieve a tight fit between the tooling filling part 10 and the irregularly shaped annular groove of the workpiece, the temperature difference between T2 and T1 is 5℃~12℃ for polyethylene tooling; 10℃~20℃ for polypropylene tooling; and 8℃~13℃ for polyvinyl chloride tooling.

[0029] For further details, please continue to see Figure 2 When protecting the sharp corners of the irregularly shaped annular groove in the middle of the workpiece, a metal or plastic annular ring is used to wrap around the outer circumference of the filling part 10 one or more times, tightened with screws or cable ties. This applies a tightening pressure along the first circumferential direction to the protective fixture for the sharp corners of the irregularly shaped annular groove, thereby securing the workpiece and the protective fixture. The first circumferential direction is... Figure 2 In the direction E shown, the irregular annular groove of the workpiece is subjected to radial pressure.

[0030] It should be noted that the tightening pressure applied in the E direction, also known as radial pressure, should be controlled between 2 and 5 MPa. The reason is that when the tightening pressure is greater than 5 MPa, the protective part 20 of the irregular annular groove edge protection fixture will exert excessive pressure on the edge and sharp corner of the irregular annular groove of the workpiece, which is easy to cause damage to the edge and sharp corner. When the tightening pressure is less than 2 MPa, the filling part 10 filled in the irregular annular groove is loose or even falls off directly, making the processing unreliable.

[0031] As another fastening method, please refer to Figure 3 , Figure 3 This is a schematic diagram illustrating the installation of the irregularly shaped annular groove edge protection fixture provided in this embodiment of the invention, which protects the irregularly shaped annular groove edge of a workpiece. This installation method is mainly used to protect the sharp corners of the irregularly shaped annular groove edge of the workpiece. Figure 3 As shown, the workpiece has an irregularly shaped annular groove D in the middle; a protective fixture for the pointed edge of the irregularly shaped annular groove D is added to the ring wall structure on the right side of the groove D to protect it. It can be understood that the left side of the irregularly shaped annular groove D also has a similar groove (not shown in the figure), and a protective fixture for the pointed edge of the irregularly shaped annular groove is also provided inside this groove.

[0032] like Figure 3As shown, the protective fixture added to the ring wall structure has a filling part 10 that adopts a contoured structure adapted to the edge ring wall structure of the workpiece and fits tightly against the edge ring wall structure. Its edge, which connects with the protective part 20, is flush with the groove edge of the groove D. The protective part 20 is located outside the groove D and completely covers the sharp corner of the groove edge on the right side. The protective part 20 extends beyond the groove by a certain height d and the width of the excess in the horizontal direction is... Figure 2 The situation is consistent with that in China.

[0033] When using Figure 3 When protecting the sharp corners of the grooves on the edge of a workpiece using the method shown, the fastening of the irregular annular groove sharp edge protection fixture typically requires forces at two angles. On one hand, by using a metal or plastic annular ring around the outer circumference of the filling part 10, one or more turns are tightened with screws or cable ties, a fastening pressure is applied to the irregular annular groove sharp edge protection fixture in the first radial direction. Simultaneously, on the other hand, by using clamps or chucks with bolts on the outside of the filling part 10, a fastening pressure is applied to the irregular annular groove sharp edge protection fixture in the second direction, forming a fastening force in the H direction, thereby achieving the fastening of the workpiece and the irregular annular groove sharp edge protection fixture. Figure 3 As shown, the first radial direction is Figure 3 The E direction shown is the radial direction of the workpiece groove, and the second direction is... Figure 3 The F direction shown is the axial direction perpendicular to the E direction and pointing to the left.

[0034] It should be noted that the pressure in directions E and F is related to the inclination angle of the workpiece groove surface, such as... Figure 3 As shown, when the inclination angle of the annular groove is a regular inclined plane and is θ, the pressure in the E and F directions must satisfy... ,in, The tightening pressure in the E direction is the positive pressure. This refers to the tightening pressure in the F direction, also known as lateral pressure. (Based on the previous text...) Figure 2 Analysis of the positive pressure shows that when the positive pressure is 2~5MPa, the protective part 20 of the irregular annular groove edge protection fixture will not cause pressure damage to the sharp corner of the irregular annular groove edge of the workpiece, and can also achieve a good fastening effect. Thus, the fastening pressure in the E direction and the F direction can be obtained.

[0035] In addition, it should be noted that when the tooth surface of the sharp corner of the groove edge of the workpiece is an irregular curved surface, the angle between the line connecting the starting point and the ending point of the irregular annular groove surface and the horizontal line is regarded as θ.

[0036] In this embodiment, regardless of Figure 2 The irregularly shaped annular groove edge protection tooling in the middle, or Figure 3The irregular annular groove edge protection tooling in the middle uses the same material and processing method for its filling part 10 and protection part 20.

[0037] Optionally, in another embodiment, the materials used for the filling part 10 and the protective part 20 also include inorganic magnetic particles to form a composite magnetic polymer material irregular annular groove edge protection tooling, which is adapted to be fastened by magnetic attraction.

[0038] Specifically, in the 3D printing of irregularly shaped annular groove edge protection tooling, inorganic magnetic particles are mixed in to obtain a composite magnetic polymer material filler block. When iron oxide (Fe3O4) is used as the inorganic magnetic particle, the tooling exhibits significant magnetism when its mass fraction is between 13% and 22%. When magnetite is used as the inorganic magnetic particle, a mass fraction of 18% to 30% can also give the tooling significant magnetism.

[0039] This allows the irregularly shaped annular groove edge protection fixture to be magnetically fastened to the workpiece. Specifically, magnetic adhesive or magnetic strips can be applied to the inside or outside of the irregularly shaped annular groove on the workpiece, thereby attracting it to the magnetic filler block.

[0040] In another embodiment of this utility model, the irregular annular groove tip protection tooling and the workpiece can also be fastened by adhesive bonding; wherein the adhesive includes epoxy resin adhesive, polyurethane adhesive or acrylic adhesive.

[0041] This utility model discloses a protective fixture for the sharp edges of irregularly shaped annular grooves, comprising a filling part and a protective part. The protective part is located above the filling part, and both are integrally formed. The filling part adopts a contoured structure adapted to the irregularly shaped annular groove or the annular wall structure of the workpiece edge. It is correspondingly positioned within the irregularly shaped annular groove in the middle of the workpiece or on the annular wall structure of the workpiece edge, and fits tightly to protect the sharp corners of the groove edges of the irregularly shaped annular groove in the middle of the workpiece or the irregularly shaped annular groove on the edge of the workpiece. The edge where the filling part connects to the protective part is flush with the groove edge of the irregularly shaped annular groove. The protective part is located outside the irregularly shaped annular groove and completely covers the sharp corners of the groove edges on both sides of the irregularly shaped annular groove in the middle of the workpiece, or the sharp corners of the groove edges on one side of the irregularly shaped annular groove on the edge of the workpiece. This edge protection fixture can provide comprehensive protection for the sharp corners of the irregularly shaped annular grooves of the workpiece during sandblasting, waterjeting, and tumbling polishing deburring processes, avoiding chamfering, erosion, or even damage to the sharp corners caused by the impact and friction of abrasive particles, thus improving the subsequent sealing and safety of the workpiece. It also solves the problems of stability, reliability and batch processing efficiency of manual grinding for annular grooves, especially irregular annular grooves.

[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0043] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A tooling for protecting the pointed edge of an irregularly shaped annular groove, characterized in that, Used for installation within irregularly shaped annular grooves of workpieces during sandblasting, waterjeting, and tumbling polishing deburring processes to protect the sharp corners of the groove edges; the irregularly shaped annular groove sharp edge protection fixture includes a filling part (10) and a protective part (20); the protective part (20) is located above the filling part (10), and both are integrally formed; wherein, The filling part (10) adopts a contoured structure adapted to the irregular annular groove of the workpiece or the annular wall structure of the edge of the workpiece. It is correspondingly set in the irregular annular groove in the middle of the workpiece or on the annular wall structure of the edge of the workpiece, and fits tightly to protect the sharp corner of the groove edge of the irregular annular groove in the middle of the workpiece or the sharp corner of the groove edge of the irregular annular groove on the edge of the workpiece, respectively. The edge of the filling part (10) and the protection part (20) is flush with the groove edge of the irregular annular groove. The protective part (20) is located outside the irregular annular groove and completely covers the groove edge sharp corners on both sides of the irregular annular groove in the middle of the workpiece, or the groove edge sharp corners on one side of the irregular annular groove at the edge of the workpiece; and the height of the protective part (20) beyond the groove edge of the irregular annular groove is 1mm to 5mm.

2. The irregularly shaped annular groove edge protection tooling according to claim 1, characterized in that, The width of the protective part (20) extending beyond the sharp corner of the groove in the horizontal direction is 0.05mm to 0.5mm.

3. The irregularly shaped annular groove edge protection fixture according to claim 1, characterized in that, The filling part (10) and the protective part (20) are integrally formed by injection molding, machining or 3D printing to obtain a contoured structure that fits the irregular annular groove; wherein, The filling part (10) and the protective part (20) are made of polymer materials, including one of polyethylene, polypropylene, polystyrene, polymethyl methacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene or polyethylene terephthalate.

4. The irregularly shaped annular groove edge protection fixture according to claim 1, characterized in that, When protecting the sharp corner of the irregular annular groove in the middle of the workpiece, a metal or plastic annular ring is used to tighten the outer ring of the protective part (20) around the circumference of the filling part (10) with screws or cable ties to apply a tightening pressure to the irregular annular groove sharp corner protection tool along the first circumferential direction, thereby achieving the fastening of the workpiece and the irregular annular groove sharp corner protection tool.

5. The irregularly shaped annular groove edge protection fixture according to claim 1, characterized in that, When protecting the sharp corners of the irregular annular groove edges of a workpiece, a metal or plastic annular ring is used around the outer ring of the protective part (20) to tighten it around the circumference of the filling part (10) with a screw or cable tie, thereby applying a tightening pressure to the irregular annular groove edge protection fixture in the first radial direction; at the same time, a clamp or chuck is used on the outside of the filling part (10) to apply a tightening pressure to the irregular annular groove edge protection fixture in the second direction, thereby achieving the fastening of the workpiece and the irregular annular groove edge protection fixture.

6. The irregularly shaped annular groove edge protection tooling according to claim 1, characterized in that, The filling part (10) and the protective part (20) are made of materials that also include inorganic magnetic particles to form a composite magnetic polymer material with irregularly shaped annular grooves and sharp edges for protection, which are adapted to be fastened by magnetic attraction.

7. The irregularly shaped annular groove edge protection tooling according to claim 1, characterized in that, The irregularly shaped annular groove edge protection fixture is fastened to the workpiece by adhesive bonding.

Images