An upper hook groove machining tool for an aero-engine sealing groove

Abstract

The utility model relates to the technical field of aero-engine part machining, and particularly discloses an upper hook groove machining tool for an aero-engine sealing groove; the tool comprises a detachably connected shank and a tool body, the tool body end is provided with a cutting edge with a spherical cross section, the cutting edge extends away from the tool body end and forms a V-shaped cutting groove with an opening facing the shank, the tool body two sides are provided with first and second clamping surfaces, the cutting edge outer side surface and the second reference surface have an included angle of 117 degrees, the cutting edge cross section highest point and the second reference surface height are 9.4mm, and the shank fixes the tool body in the installation position through locking bolts and a pressing plate. The tool can solve the problems of interference with parts, insufficient rigidity, large cutting force, serious tool and groove wear caused by ferrous alloy plastic springback, and difficult iron filings control during traditional tool machining, realizes high-precision and high-efficiency processing of the upper hook groove, prolongs the tool life, reduces the processing scrap rate and cost, and guarantees the aero-engine key part manufacturing quality and batch consistency.

Description

Technical Field

[0001] This utility model relates to the field of aero-engine component processing technology, and in particular to a tool for machining the upper groove of an aero-engine sealing groove. Background Technology

[0002] In the field of aero-engine manufacturing, the sealing groove is the core structure for achieving an airtight seal between the engine rotor and stator. Its machining accuracy directly determines the engine's airtightness, power efficiency, and operational reliability. The upper hook groove in the sealing groove is a key substructure. Because it needs to form a precise fit with the sealing component, it places far more stringent requirements on machining dimensional tolerances, surface roughness, and structural integrity than ordinary mechanical parts. Typically, the dimensional tolerance of the upper hook groove is required to be controlled within ±0.02mm, the surface roughness must reach Ra0.8μm or less, and the groove wall must not have defects such as scratches or chipping. Otherwise, it will directly lead to gas leakage during engine operation, causing serious consequences such as power loss, local overheating, or even damage to core components.

[0003] However, in the actual machining process of the upper groove of the current aero-engine sealing groove, due to the special structure of the upper groove (such as deep groove, narrow opening, and complex curvature at the corner) and the characteristics of the machining materials (mostly high-temperature alloys, titanium alloys and other high-strength iron alloy materials, such as high-temperature alloys, titanium alloys, etc., which have a hardness of up to HRC35-45, and strong plasticity and high cutting resistance), traditional machining tools have always faced technical bottlenecks that are difficult to overcome.

[0004] Interference between the cutting tool and the workpiece is a significant problem, making it difficult to guarantee machining safety and accuracy. The machining space for the upper groove is extremely limited, especially in the area near the side wall and bottom corner of the sealing groove. Traditional cutting tools often use an integrated rigid structure, and the layout of the tool body and cutting edge is difficult to adapt to the irregular space of the upper groove. During the feed process, it is very easy for the cutting tool to collide or rub against the non-machined surfaces of the sealing groove (such as the groove wall and groove shoulder). This interference not only scratches the surface of the workpiece and damages the accuracy of the machined area, but in severe cases, it can also cause the tool to break and the workpiece to be scrapped. According to industry machining data, the scrap rate of upper groove machining caused by tool interference can reach 8%-12%, which significantly increases manufacturing costs and production cycle. Insufficient tool rigidity and excessive cutting force lead to poor machining stability. In order to adapt to the limited machining space, traditional cutting tools often need to reduce the cross-sectional size of the tool body, resulting in a significant decrease in the overall rigidity of the tool. Utility Model Content

[0005] In view of this, the present invention provides a tool for machining the upper hook groove of an aero-engine sealing groove, in order to solve the technical problem of how to reduce the wear of the tool by cutting force and the plastic springback of ferroalloy while avoiding interference between the tool and the part during the machining of the upper hook groove of the aero-engine sealing groove, so as to extend the tool service life.

[0006] This utility model embodiment provides a tool for machining the upper groove of an aero-engine sealing groove, including: a tool holder and a tool body detachably connected to the tool holder; the end of the tool body is provided with a cutting edge, the cross-section of the cutting edge is spherical; the cutting edge extends from the tool body to the end away from the tool body and forms a "V" shaped cutting groove with the tool body, and the opening of the cutting groove is opposite to the tool holder.

[0007] Preferably, the cutting edge includes a first cutting edge and a second cutting edge respectively disposed at both ends of the tool body;

[0008] The first cutting edge and the second cutting edge are arranged opposite to each other.

[0009] Preferably, the cutting edge is inclined to the cutter body at the end away from the cutter body.

[0010] Preferably, the two sides of the blade body are respectively provided with a first clamping surface and a second clamping surface adapted to the first cutting edge and the second cutting edge.

[0011] Preferably, one end of the handle is provided with an installation position, the blade is fixed to the installation position of the handle by a locking bolt, and a pressure plate is provided between the blade and the locking bolt.

[0012] Preferably, one end of the recessed surface of the "V"-shaped cutting groove is arc-shaped, and the other end is flat.

[0013] The radius of the arc surface is set to 3mm, and the arc surface is set at a 72° angle with the plane.

[0014] Preferably, on the blade body, the planes containing the first clamping surface and the second clamping surface are respectively set as the first reference plane and the second reference plane.

[0015] Preferably, the cross-sectional diameter of the cutting edge is set to 3 mm.

[0016] Preferably, the outer surface of the cutting edge is set at an angle of 117° with the second reference plane.

[0017] Preferably, the height between the highest point of the cutting edge section and the second reference surface is set to 9.4 mm.

[0018] The tool for machining the upper hook groove of the sealing groove of an aero-engine provided by this utility model has the following beneficial effects:

[0019] The machining tool for the upper hook groove of the sealing groove in aero-engines, through the combination design of a detachable tool holder and tool body, the structural optimization of the spherical section cutting edge and the "V" shaped cutting groove, and the precise setting of the tool body clamping surface and reference surface, effectively solves the core pain points of traditional tool machining. It can avoid the interference problem between the tool and the part through the reasonable cutting edge layout and extension direction, ensuring machining safety and upper hook groove dimensional accuracy (the dimensional tolerance can be stably controlled within ±0.02mm, and the surface roughness reaches Ra0.8μm or less). It can also enhance the rigidity of the tool with the adapted tool body structure, reduce the cutting force and chatter risk when cutting high-strength iron alloys, and reduce the secondary friction and wear of the tool due to the plastic springback of the material. At the same time, the arc and plane design of the "V" shaped cutting groove can guide the iron chips to flow stably out of the groove, avoiding the scratches inside the groove and tool chipping caused by the accumulation of iron chips, significantly extending the tool life. Ultimately, it can achieve high-precision and high-efficiency machining of the upper hook groove, meet the stringent manufacturing requirements of key components of aero-engines, reduce the machining scrap rate and production costs, and improve the consistency and stability of batch machining. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0021] Figure 1 This is a schematic diagram of the structure of a tool for machining the upper groove of an aero-engine sealing groove;

[0022] Figure 2 This is a schematic diagram of the mounting structure of a tool for machining the upper groove of an aero-engine sealing groove;

[0023] Parts and their numbers in the diagram:

[0024] 100-Tool holder, 110-Mounting position, 111-Locking bolt, 112-Pressure plate;

[0025] 200-Tool body, 210-First cutting edge, 220-Second cutting edge, 230-Cutting groove, 241-First clamping surface, 242-Second clamping surface. Detailed Implementation

[0026] 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. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0027] Example 1

[0028] Please see Figure 1 This utility model provides a machining tool for the upper groove of an aero-engine sealing groove. In the aero-engine's gas path sealing system, the upper groove of the sealing groove is the core structure for achieving precise assembly of sealing components (such as honeycomb seals and brush seals). Its machining quality is directly related to the engine's aerodynamic efficiency and operational safety. The groove width, groove depth, and corner radius of the upper groove need to form a seamless fit with the sealing component. Once there is a dimensional deviation or surface defect, it will cause high-pressure airflow leakage during engine operation, resulting in a 5%-8% increase in fuel consumption, and even causing a rotor-stator collision accident. Aero-engine sealing grooves are mostly opened on core rotating components such as turbine disks and compressor disks. The base material of these components is mostly high-strength iron alloys such as GH4169 and TC4. These materials not only have high hardness at room temperature (HRC30-40), but also maintain excellent mechanical properties at high temperatures. The deformation resistance and work hardening effect of the material during cutting are significant, which brings great challenges to the precision machining of the upper groove.

[0029] From a structural perspective, the design of the upper hook groove typically features a narrow opening and deep cavity. The groove width is generally 3-5mm, while the groove depth can reach 8-12mm. Furthermore, a specific radius arc is required at the corner between the groove bottom and the groove wall to avoid stress concentration. This structure necessitates the machining tool to operate deep within the narrow groove cavity. The cutting edge layout of traditional tools is difficult to adapt to the tool body dimensions: if the cutting edge extension length is insufficient, it cannot machine to the specified depth at the bottom of the groove; if the cutting edge extension length is extended, it will lead to an increased tool overhang ratio, a sharp decrease in rigidity, and a tendency for tool deflection during cutting, resulting in excessive groove depth deviations or even tool breakage. In addition, the groove wall of the upper hook groove is extremely close to other structures in the sealing groove, with a minimum clearance of only 2-3mm. The side of the tool body 200 of traditional integrated tools is prone to scraping against adjacent structures, which not only damages the precision of the machined surface but may also cause micro-cracks in the parts, affecting the fatigue life of the components.

[0030] The aforementioned problems collectively make it difficult for traditional machining methods to meet the stringent machining requirements of the sealing groove on aero-engines. Low machining efficiency, high scrap rate, and high tool consumption costs have become key bottlenecks restricting the mass production and quality improvement of core aero-engine components. There is an urgent need to optimize the tool structure design and break through the limitations of existing machining technologies.

[0031] Please see Figure 1 and Figure 2 This embodiment provides a machining tool for the upper hook groove of an aero-engine sealing groove. The machining tool includes a tool holder 100 and a tool body 200 detachably connected to the tool holder 100. During assembly, the corresponding tool body 200 can be quickly replaced according to the different specifications of the upper hook groove without replacing the entire tool, thus reducing tool procurement and maintenance costs. During debugging, if the positioning of the tool body 200 is deviated, the position of the tool body 200 can be adjusted individually to avoid overall rework caused by the integration of the tool holder 100 and the tool body 200, thereby improving debugging efficiency. The end of the tool body 200 is provided with a cutting edge, and the cross-section of the cutting edge is spherical.

[0032] During tool setting, the arc profile of the spherical cutting edge can serve as a precise positioning reference, and the opening direction of the "V" groove can be visually confirmed, reducing tool setting errors and laying the foundation for subsequent machining accuracy. During roughing, the arc surface of the spherical cutting edge can disperse cutting forces. Compared with traditional flat cutting edges, the arc surface has a more reasonable contact area with the material, reducing cutting resistance during high-strength iron alloy machining and reducing tool chatter. During finishing, the spherical profile can complete the forming of the upper hook groove corner arc in one pass, without the need to replace the forming tool, avoiding dimensional deviations caused by multiple tool passes. At the same time, the wear of the spherical cutting edge is more uniform, extending the machining life of a single tool.

[0033] The cutting edge extends from the tool body 200 away from the end of the tool body 200, forming a "V"-shaped cutting groove 230 between it and the tool body 200. The opening of the cutting groove 230 is opposite to the tool holder 100. The cutting edge extension structure and the "V"-shaped groove opening direction can prevent interference and remove chips. During machining, the cutting edge extends away from the tool body 200, reaching deep into the narrow cavity structure of the upper groove, avoiding interference between the main body of the tool body 200 and the adjacent structure of the sealing groove. At the same time, the opening of the "V"-shaped groove faces the tool holder 100, allowing iron chips to flow naturally along the groove opening to the chip removal system of the equipment, rather than accumulating in the groove. This solves the problem of iron chips clogging and scratching the groove wall in traditional machining, reduces wear inside the groove, and improves surface quality.

[0034] Furthermore, the cutting edge includes a first cutting edge 210 and a second cutting edge 220 respectively disposed at both ends of the tool body 200; the first cutting edge 210 and the second cutting edge 220 are disposed opposite to each other.

[0035] The opposing dual cutting edges can adapt to different cutting requirements. For example, when machining areas of different depths or angles in a groove, there is no need to disassemble the tool and replace the tool body 200. Simply rotate the spindle 180° to switch the cutting edges. The first cutting edge 210 can handle the forward cutting path, while the second cutting edge 220 can handle cutting scenarios with reverse or tilted angles, reducing positioning errors caused by tool orientation adjustments. This is especially suitable for machining complex structures such as narrow and deep cavities in sealing grooves. The dual cutting edge design allows a single tool body 200 to use both cutting edges alternately. When the first cutting edge 210 wears due to prolonged machining, there is no need to immediately replace the tool body 200. The tool body can be switched to the unworn second cutting edge 220 to continue machining until both cutting edges reach their wear limit, at which point the entire tool body can be replaced. This doubles the effective cutting time of the tool body 200, reduces the frequency of tool body 200 replacement, and lowers tool consumption costs.

[0036] When installing the tool body 200, ensure that the opposing directions of the first cutting edge 210 and the second cutting edge 220 match the machining path plan. In the initial stage of machining, the first cutting edge 210 can be used for roughing first. After it has worn to a certain extent, the spindle can be rotated through the equipment program to enable the second cutting edge 220 for finishing. Alternatively, when machining upper grooves with different batches and different angle requirements, the corresponding cutting edge can be directly switched according to the specific cutting direction requirements without the need for recalibration, which greatly shortens the process changeover time.

[0037] Furthermore, the cutting edge is angled relative to the tool body 200 at the end furthest from the tool body 200. This angled arrangement creates a specific rake angle at the end of the cutting edge furthest from the tool body 200, which, in conjunction with the spherical cross-section of the cutting edge, allows for smoother cutting into high-strength ferroalloy materials. This angle design transmits the cutting force inward to the tool body 200, reducing the radial component of the force during cutting and lowering the risk of tool chatter. It is particularly suitable for machining narrow, deep cavity structures such as grooves on sealing slots in aero-engines, avoiding dimensional deviations caused by excessive cutting forces.

[0038] Specifically, the machining space for the upper groove is small, and it is often close to other structures of the sealing groove (such as side grooves and stepped surfaces). The bevel design at the end of the cutting edge can reduce the radial dimension of the tool body 200 in this area, so that when the cutting edge is deep into the groove cavity for machining, the clearance between the tool body 200 and non-machined surfaces such as the groove wall and groove shoulder is increased, which effectively avoids the scrapping interference between the tool and the part, protects the precision of the machined surface, and reduces the risk of part scrap.

[0039] Furthermore, the inclined surface and the "V"-shaped cutting groove 230 form a coordinated chip removal channel. Under the guiding effect of the inclined surface, the iron chips generated during cutting can enter the "V"-shaped groove more smoothly and be discharged along the opening direction. This design is particularly suitable for processing tough chips of high-strength iron alloys, reducing the phenomenon of iron chips wrapping around the cutting edge or accumulating in the groove, reducing tool wear and groove surface scratches caused by iron chip compression, and ensuring machining stability.

[0040] Furthermore, the tool body 200 has a first clamping surface 241 and a second clamping surface 242 on both sides, which are adapted to the first cutting edge 210 and the second cutting edge 220, respectively. One end of the tool holder 100 has a mounting position 110, and the tool body 200 is fixed to the mounting position 110 of the tool holder 100 by a locking bolt 111. A pressure plate 112 is also provided between the tool body 200 and the locking bolt 111. The adaptation design of the clamping surfaces and the cutting edges ensures that the tool body 200 can be positioned with the tool holder 100 with a uniform reference each time it is installed. Combined with the planar pressing action of the pressure plate 112, the repeated positioning error of the tool body 200 during installation can be controlled to a very small range. When switching cutting edges or replacing the tool body 200, there is no need for complex tool setting again; the consistency of the machining reference can be maintained solely through the precise fit of the clamping surfaces, significantly reducing dimensional deviations caused by tool changes. This is particularly suitable for precision control during batch machining of grooves on the sealing grooves of aero-engines.

[0041] Furthermore, one end of the recessed surface of the "V"-shaped cutting groove 230 is an arc surface, and the other end is a plane; the radius of the arc surface is set to 3mm, and the arc surface and the plane are set at an angle of 72°.

[0042] The "V"-shaped cutting groove 230 has a 3mm radius arc surface at one end and a flat surface at the other end, with the two forming a 72° angle. This structural design can be adapted to the hook groove structure, ensuring the machining dimensional accuracy. The corner of the hook groove in the sealing groove of aero-engine usually requires a specific radius arc to avoid stress concentration and adapt to the assembly of sealing parts. The 3mm radius arc surface of the cutting groove 230 can precisely correspond to the corner arc size of the hook groove. During machining, the arc surface can directly fit the corner contour of the groove body, completing the arc forming in one go. There is no need to correct the corner size through multiple passes or re-grinding. This effectively avoids the arc accuracy deviation caused by traditional flat cutting tools and subsequent grinding, ensuring that the size of the corner of the hook groove meets the stringent tolerance requirement of ±0.02mm.

[0043] Meanwhile, the flat end can be adapted to the straight wall area of ​​the hook groove, and together with the curved surface, it forms a complete groove profile with a straight wall and a rounded arc. It can complete the processing of different structural areas of the hook groove without changing the tool, thus improving the consistency of the forming.

[0044] Furthermore, the cutting force can be optimized to reduce tool wear and part deformation. The 72° arc-to-plane angle design is calculated based on the cutting characteristics of high-strength iron alloys: this angle allows the cutting groove 230° to form a reasonable rake angle with the cutting edge, enabling chips to flow smoothly out along the inclined channel formed by the 72° angle during machining, avoiding severe friction between chips and the groove wall; at the same time, the angle can disperse the cutting force, converting the radial cutting force into an axial component along the plane and arc, reducing local force concentration on the cutting edge of the tool, and lowering the wear rate of the spherical cutting edge. In addition, the dispersed cutting force can also reduce the machining deformation of the part, preventing the groove wall from concave due to pressure, and ensuring the dimensional stability of the groove width and depth.

[0045] The narrow, deep cavity structure of the upper-groove design easily leads to chip accumulation. However, the combination of an arc surface, a flat surface, and a 72° angle creates an efficient chip removal channel. On one hand, the 3mm radius arc surface prevents chips from getting stuck at corners, allowing them to smoothly transition to the flat area. On the other hand, the 72° angle creates a downward flow tendency, guiding chips to quickly exit the groove along the flat surface, preventing chips from entangled on the cutting edge or accumulating inside the groove. This directional chip removal effect not only prevents scratches on the groove wall caused by repeated chip crushing but also reduces secondary friction between chips and the tool's flank face, further extending tool life.

[0046] Furthermore, on the tool body 200, the planes containing the first clamping surface 241 and the second clamping surface 242 are respectively designated as the first reference plane and the second reference plane. The cross-sectional diameter of the cutting edge is set to 3 mm. The outer surface of the cutting edge forms an angle of 117° with the second reference plane. The height between the highest point of the cutting edge's cross-section and the second reference plane is set to 9.4 mm.

[0047] In this embodiment, the first reference surface and the second clamping surface 242 are set as reference surfaces. Combined with parameter settings such as a cutting edge cross-section diameter of 3mm, an angle of 117° between the outer side and the second reference surface, and a height of 9.4mm between the highest point of the cross-section and the second reference surface, the primary function is to establish a unified precision reference system. The reference surface provides a clear reference for tool manufacturing, assembly, and machining, ensuring that the dimensions of each parameter are accurately controllable. This ensures that the position and angle of the cutting edge are highly matched with the design dimensions of the upper groove, guaranteeing machining accuracy from the source and avoiding dimensional deviations caused by ambiguous references. Secondly, these parameter settings are precisely adapted to the upper groove machining scenario. The 3mm cross-section diameter matches the groove width requirement, while the 117° angle and 9.4mm height, combined with the depth, tilt angle, and other structural characteristics of the upper groove, ensure that the cutting edge can penetrate deep into the groove cavity to complete the machining, while avoiding interference with the groove wall. Simultaneously, it optimizes the cutting force state, improves machining stability and efficiency, and meets the stringent machining requirements of aero-engine components.

[0048] Specifically, based on the machining requirements of the upper hook groove of the sealing groove of the aero-engine, the tool body 200 is installed at the corresponding connection position of the tool holder 100 to ensure a stable and detachable connection between the tool body 200 and the tool holder 100. Then, the assembled tool is clamped onto the spindle of the machining equipment (such as a CNC milling machine or machining center). The tool position is precisely calibrated through the tool setting system of the equipment. With the reference surface of the tool body 200 as a reference, the spherical center of the cutting edge and the opening direction of the "V" shaped cutting groove 230 are precisely aligned with the machining path (groove depth and groove width direction) of the upper hook groove. At the same time, it is confirmed that the opening direction of the "V" shaped cutting groove 230 is opposite to the tool holder 100 to avoid interference between the groove and the part during machining.

[0049] Start the machining equipment and drive the tool to move towards the machining area of ​​the sealing groove according to the preset roughing parameters. Utilize the cutting edge of the spherical section at the end of the tool body 200 to gradually cut into the surface of the part. Through the extension structure of the cutting edge away from the tool body 200, it penetrates to the preset depth of the upper hook groove of the sealing groove. At this time, the "V" shaped cutting groove 230 works synchronously with the cutting edge to initially form the cavity of the upper hook groove, while guiding a large amount of iron chips generated by roughing to be discharged along the opening of the "V" shaped groove.

[0050] After rough machining is completed, the machining parameters are adjusted, and the tool is driven to perform finishing machining along the contour path of the upper hook groove: relying on the arc characteristics of the spherical section cutting edge, the groove wall and bottom corner are smoothly cut to correct the dimensional deviation after rough machining; the "V" shaped cutting groove 230 continuously guides the small iron chips generated during finishing to be discharged, avoiding the impact of iron chip residue on the groove surface accuracy, and finally machining an upper hook groove that meets the dimensional requirements.

[0051] After several processing cycles, if it is necessary to replace the processed parts or if the tool is partially worn, the tool body 200 can be removed from the tool holder 100. The worn tool body 200 can be repaired or replaced with a new tool body 200. The tool holder 100 can be reused after cleaning. If the tool is in good overall condition, it can be directly disassembled and stored for reassembly during the next processing cycle.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tool for machining the upper groove of an aero-engine sealing groove, characterized in that, include: Handle And the blade body, which is detachably connected to the handle; The end of the blade is provided with a cutting edge, and the cross-section of the cutting edge is spherical; The cutting edge extends from the blade body to the end away from the blade body and forms a "V"-shaped cutting groove with the blade body, and the opening of the cutting groove is opposite to the handle.

2. The tool for machining the upper hook groove of an aero-engine sealing groove according to claim 1, characterized in that, The cutting edge includes a first cutting edge and a second cutting edge respectively disposed at both ends of the tool body; The first cutting edge and the second cutting edge are arranged opposite to each other.

3. The tool for machining the upper groove of an aero-engine sealing groove according to claim 1, characterized in that, The cutting edge is set at an angle to the tool body at the end away from the tool body.

4. The tool for machining the upper groove of an aero-engine sealing groove according to claim 2, characterized in that, The blade body has a first clamping surface and a second clamping surface on both sides, which are adapted to the first cutting edge and the second cutting edge, respectively.

5. The tool for machining the upper hook groove of an aero-engine sealing groove according to claim 4, characterized in that, One end of the handle is provided with an installation position, and the blade is fixed to the installation position of the handle by a locking bolt. A pressure plate is also provided between the blade and the locking bolt.

6. The tool for machining the upper groove of an aero-engine sealing groove according to claim 1, characterized in that, One end of the recessed surface of the "V"-shaped cutting groove is arc-shaped, and the other end is flat. The radius of the arc surface is set to 3mm, and the arc surface is set at a 72° angle with the plane.

7. The tool for machining the upper groove of an aero-engine sealing groove according to claim 1, characterized in that, On the blade body, the planes containing the first clamping surface and the second clamping surface are respectively set as the first reference plane and the second reference plane.

8. The tool for machining the upper groove of an aero-engine sealing groove according to claim 1, characterized in that, The diameter of the cutting edge is set to 3mm.

9. The tool for machining the upper groove of an aero-engine sealing groove according to claim 7, characterized in that, The outer surface of the cutting edge is set at an angle of 117° with the second reference plane.

10. A tool for machining the upper groove of an aero-engine sealing groove according to claim 7, characterized in that, The height between the highest point of the cutting edge section and the second reference plane is set to 9.4 mm.

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