Cutter for machining end face hole of aero-engine casing

Abstract

The utility model belongs to the technical field of machining cutters, in particular to a cutter for machining an end face hole of an aero-engine casing, which comprises an alloy cutter body and a diamond blade, the alloy cutter body comprises a first cutter body, and a mounting lug with a hole is fixed at the end part of the first cutter body; a second cutter body; the connecting protruding block is fixed to the end of the second cutter body, and the connecting protruding block is embedded into the inner side space of the two mounting lugs with the holes. The connecting convex block and the mounting lug with the hole form a rotating structure by utilizing the rivet; the second sunk screw is fixed on the mounting lug with the hole in a thread screwing manner; according to the diamond cutter, the alloy cutter body comprises the first cutter body and the second cutter body, the first cutter body and the second cutter body can relatively rotate with the rivet as the axis, the angle of the diamond blade can be conveniently adjusted, the diamond cutter is suitable for different machining requirements, the diamond blade is fixed through the second sunk screw, and the stability of the adjusted diamond blade is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tools, and in particular relates to a tool for machining end surface of an aircraft engine casing. Background Art

[0002] The aircraft engine casing is the outer shell of the engine, which is a thin and large irregular cylindrical structure (usually composed of multiple cylinders spliced ​​together by flange rings).

[0003] When machining aircraft engine casings, machining the casing end surfaces is a necessary step. There are annular precision narrow groove structures formed on the casing by turning, such as the deep narrow grooves on the end faces used to install stator guide vanes to guide the airflow. When machining the deep narrow grooves on the casing end faces, a groove cutter is usually used.

[0004] A slotting cutter is a very common machining tool. The most commonly used slotting cutter, such as the Chinese utility model patent with authorization announcement number CN218611742U, discloses "a slotting cutter with high strength and long service life", including a slotting cutter body, the slotting cutter body including a tool body and a blade, the surface of the tool body is provided with a first protective layer, the first protective layer includes a covering layer, a first corrosion-resistant layer, an anti-oxidation layer and a high-strength layer, the surface of the blade is provided with a second protective layer, the second protective layer includes a wear-resistant layer, a second corrosion-resistant layer, a heat-insulating layer and a reinforcing layer, and the covering layer is located on the outer surface of the first corrosion-resistant layer.

[0005] Although the groove cutters in the prior art including those mentioned above can meet general processing requirements and complete the general deep and narrow groove processing on the end face of the casing, in actual use, the cutter body is an integral structure, and its angle cannot be adjusted after the blade is fixed. This is because when processing different deep and narrow grooves, the blade needs to have different inclination angles, and for the processing of different inclined surfaces, the blade also needs to have different inclination angles. The prior art requires replacing groove cutters of different specifications, which is more troublesome.

[0006] In order to solve the above problems, the present application proposes a tool for machining the end surface of an aircraft engine casing. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a tool for machining the end surface of an aircraft engine casing, which has the characteristics of being easy to use, easy to adjust and having a wide range of applications.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a tool for machining the end surface of an aircraft engine casing, comprising an alloy tool body and a diamond blade fixed to the head end of the alloy tool body, wherein the alloy tool body comprises:

[0009] A first blade body, at the end of which two symmetrically distributed mounting ears with holes are fixed;

[0010] A second cutter body, the diamond blade being fixed on the second cutter body;

[0011] A connecting protrusion, the connecting protrusion is fixed to the end of the second blade body, and the connecting protrusion is embedded in the inner space of the two mounting ears with holes;

[0012] Rivet, the connecting protrusion forms a rotating structure with the mounting ear with holes by means of the rivet;

[0013] A No. 2 countersunk screw is fixed on the mounting ear with a hole by screwing.

[0014] As a preferred technical solution of the utility model, the connecting protrusion is provided with a plurality of positioning grooves which are evenly spaced along the circumferential direction, and the bottom end of the No. 2 countersunk screw is embedded in the positioning groove.

[0015] As a preferred technical solution of the present utility model, the thickness of the connecting protrusion is equal to the distance between the two mounting ears with holes.

[0016] As a preferred technical solution of the utility model, the end of the connecting protrusion away from the No. 2 blade body has a semicircular end surface, and the semicircular end surface is tangent to the end surface of the No. 1 blade body.

[0017] As a preferred technical solution of the utility model, the No. 2 blade body and the connecting protrusion are an integral structure formed by die casting, and the No. 1 blade body and the mounting ear with a hole are an integral structure formed by die casting.

[0018] As a preferred technical solution of the utility model, it also includes:

[0019] A pressing block, having a mounting groove on the second blade body for the diamond blade to be embedded, and the pressing block is fixed in the mounting groove to press the diamond blade;

[0020] A No. 1 countersunk screw is fixed to the No. 2 cutter body by threading after passing through the clamping block.

[0021] As a preferred technical solution of the utility model, it also includes:

[0022] A limit plug is fixed on the top and bottom surfaces of the limit plug, a second limit slot is provided on the clamping block for the limit plug to be inserted into, and a first limit slot is provided in the installation slot for the limit plug to be inserted into.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] In the utility model, the alloy blade body includes a No. 1 blade body and a No. 2 blade body. The No. 1 blade body and the No. 2 blade body can rotate relative to each other with rivets as the axis, which is convenient for adjusting the angle of the diamond blade and is suitable for different processing requirements. The blade body is fixed by a No. 2 countersunk screw to ensure the stability of the diamond blade after adjustment.

[0025] Other additional advantages and beneficial effects of the present application will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the axonometric structure of the No. 2 cutter body in the utility model;

[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of the diamond blade in the utility model.

[0030] In the figure: 1, alloy blade body; 11, blade body No. 1; 111, mounting ear with hole; 12, blade body No. 2; 121, mounting slot; 122, connecting protrusion; 1221, positioning slot; 123, limit slot No. 1; 2, diamond blade; 21, limit plug; 3, clamping block; 31, limit slot No. 2; 4, countersunk screw No. 1; 5, rivet; 6, countersunk screw No. 2. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a tool for machining end surface of an aircraft engine casing, comprising an alloy tool body 1 and a diamond blade 2 fixed to the head end of the alloy tool body 1, the alloy tool body 1 comprising: a No. 1 tool body 11, a No. 2 tool body 12, a connecting protrusion 122, a rivet 5 and a No. 2 countersunk screw 6.

[0033] Further, by Figure 1 and Figure 2 As shown, in the present embodiment, two symmetrically distributed mounting ears 111 with holes are fixed at the end of the No. 1 cutter body 11, the diamond blade 2 is fixed on the No. 2 cutter body 12, the connecting protrusion 122 is fixed on the end of the No. 2 cutter body 12, and the connecting protrusion 122 is embedded in the inner space of the two mounting ears 111 with holes, the connecting protrusion 122 forms a rotating structure with the mounting ears 111 with holes by means of rivets 5, and the No. 2 countersunk screw 6 is fixed on the mounting ears 111 with holes by threaded engagement. After adopting the above scheme, when in use, the No. 1 cutter body 11 can be fixed on the tool holder of the machine tool for processing and use. When necessary, the No. 2 countersunk screw 6 can be loosened first, and then the No. 2 cutter body 12 can be rotated. The No. 2 cutter body 12 drives the diamond blade 2 to rotate with the rivet 5 as the axis, and the angle of the diamond blade 2 is adjusted to meet different processing requirements. After the adjustment is completed, the No. 2 countersunk screw 6 is tightened to lock it.

[0034] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, a plurality of positioning grooves 1221 are provided on the connecting protrusion 122 and are evenly spaced along the circumferential direction, and the bottom end of the No. 2 countersunk screw 6 is embedded in the positioning groove 1221. After adopting the above scheme, after tightening the No. 2 countersunk screw 6, the bottom end of the No. 2 countersunk screw 6 is embedded in the positioning groove 1221, which further improves the stability of the diamond blade 2 after adjustment and avoids accidental rotation.

[0035] Preferably, by Figure 1 As shown, in this embodiment, the thickness of the connecting protrusion 122 is equal to the distance between the two mounting ears 111 with holes, which improves the stability of the connection between the first blade body 11 and the second blade body 12 and avoids relative shaking.

[0036] Preferably, by Figure 1 As shown, in the present embodiment, the end of the connecting protrusion 122 away from the No. 2 blade body 12 has a semicircular end face, and the semicircular end face is tangent to the end face of the No. 1 blade body 11. As can be seen from the figure, the end of the mounting ear 111 with a hole away from the No. 1 blade body 11 also has a semicircular end face, and the No. 2 blade body 12 has a semicircular groove. The semicircular end face of the end of the No. 1 blade body 11 abuts against the inner wall of the semicircular groove, which further improves the stability of the connection between the No. 1 blade body 11 and the No. 2 blade body 12.

[0037] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the second blade body 12 and the connecting protrusion 122 are an integral structure formed by die casting, and the first blade body 11 and the mounting ear 111 with a hole are an integral structure formed by die casting, and the structural strength is high.

[0038] Optionally, by Figure 1 and Figure 3 As shown, in this embodiment, it also includes: a clamping block 3 and a No. 1 countersunk screw 4. The No. 2 cutter body 12 has a mounting groove 121 for the diamond blade 2 to be embedded. The clamping block 3 is fixed in the mounting groove 121 for clamping the diamond blade 2. The No. 1 countersunk screw 4 penetrates the clamping block 3 and is fixed to the No. 2 cutter body 12 by threaded engagement. After adopting the above scheme, when installing the diamond blade 2, the diamond blade 2 is first placed in the mounting groove 121, and then the clamping block 3 is placed on the diamond blade 2. Finally, the No. 1 countersunk screw 4 penetrates the clamping block 3 and is fixed to the No. 2 cutter body 12 by threaded engagement, thereby completing the stable installation of the diamond blade 2.

[0039] Optionally, by Figure 1 and Figure 3 As shown, in this embodiment, it also includes: a limit plug 21, the limit plug 21 is fixed on the top and bottom surfaces of the limit plug 21, a second limit slot 31 is provided on the clamping block 3 for the limit plug 21 to be embedded, and a first limit slot 123 is provided in the installation groove 121 for the limit plug 21 to be embedded. After adopting the above scheme, when installing the diamond blade 2, the limit plug 21 is embedded in the first limit slot 123 and the second limit slot 31 to locate the installation position of the diamond blade 2, and at the same time, the stability of the installation of the diamond blade 2 is further improved to prevent the diamond blade 2 from shaking or sliding during operation.

[0040] Components not described in detail herein are prior art.

[0041] Working principle and use process of the utility model: When the slotting cutter of the utility model is used, the first cutter body 11 is fixed on the cutter seat of the machine tool and can be used for processing;

[0042] When necessary, the No. 2 countersunk screw 6 can be loosened first to disengage the No. 2 countersunk screw 6 from the positioning groove 1221, and then the No. 2 cutter body 12 is rotated, and the No. 2 cutter body 12 drives the diamond blade 2 to rotate with the rivet 5 as the axis, and the angle of the diamond blade 2 is adjusted to meet different processing requirements. After the adjustment is completed, the No. 2 countersunk screw 6 is tightened to lock it, so that the No. 2 countersunk screw 6 is embedded in the positioning grooves 1221 at different positions;

[0043] When installing the diamond blade 2, first place the diamond blade 2 in the installation groove 121, then place the clamping block 3 on the diamond blade 2, and finally make the No. 1 countersunk screw 4 pass through the clamping block 3 and fix it to the No. 2 blade body 12 by threading. The stable installation of the diamond blade 2 can be completed, and a different diamond blade 2 can be replaced by unscrewing the No. 1 countersunk screw 4.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A tool for machining an end surface of an aircraft engine casing, comprising an alloy tool body (1) and a diamond blade (2) fixed to the head end of the alloy tool body (1), characterized in that: The alloy blade body (1) comprises: A first blade body (11), at the end of which two symmetrically distributed mounting ears (111) with holes are fixed; A second blade body (12), the diamond blade (2) being fixed on the second blade body (12); A connecting protrusion (122), wherein the connecting protrusion (122) is fixed to the end of the second blade body (12), and the connecting protrusion (122) is embedded in the inner space of the two mounting ears (111) with holes; A rivet (5), wherein the connecting protrusion (122) forms a rotating structure with the rivet (5) and the mounting ear with a hole (111); A No. 2 countersunk screw (6), wherein the No. 2 countersunk screw (6) is fixed to the mounting ear (111) with a hole by means of a threaded engagement.

2. A tool for machining end surface of an aircraft engine casing according to claim 1, characterized in that: The connecting protrusion (122) is provided with a plurality of positioning grooves (1221) distributed at equal intervals along the circumferential direction, and the bottom end of the No. 2 countersunk screw (6) is embedded in the positioning groove (1221).

3. The tool for machining the end surface of an aircraft engine casing according to claim 1, characterized in that: The thickness of the connecting protrusion (122) is equal to the distance between the two mounting ears (111) with holes.

4. The tool for machining the end surface of an aircraft engine casing according to claim 1, characterized in that: The end of the connecting protrusion (122) away from the second blade body (12) has a semicircular end surface, and the semicircular end surface is tangent to the end surface of the first blade body (11).

5. The tool for machining the end surface of an aircraft engine casing according to claim 1, characterized in that: The second blade body (12) and the connecting protrusion (122) are an integral structure formed by die casting, and the first blade body (11) and the mounting ear with a hole (111) are an integral structure formed by die casting.

6. The tool for machining the end surface of an aircraft engine casing according to claim 1, characterized in that: Also includes: A pressing block (3) having a mounting groove (121) on the second blade body (12) for the diamond blade (2) to be embedded, and the pressing block (3) is fixed in the mounting groove (121) to press the diamond blade (2); A No. 1 countersunk screw (4), wherein the No. 1 countersunk screw (4) penetrates the clamping block (3) and is fixed to the No. 2 blade body (12) by means of a threaded engagement.

7. A tool for machining end surface of an aircraft engine casing according to claim 6, characterized in that: Also includes: A limit plug (21) is fixed on the top and bottom surfaces of the limit plug (21), a second limit slot (31) is provided on the pressing block (3) for the limit plug (21) to be inserted, and a first limit slot (123) is provided in the installation groove (121) for the limit plug (21) to be inserted.

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