Precise cutter for machining turbine blade of aero-engine

Abstract

The utility model belongs to the technical field of machining tools, and particularly relates to a precision tool for machining an aero-engine turbine blade, which comprises a tool handle and a tool bit which are fixed into a whole, and further comprises an extension rod, a first hexagonal slot and a second hexagonal slot, the regular hexagonal inserting block is fixed to the end, away from the second regular hexagonal inserting groove, of the extension rod, and a first regular hexagonal inserting groove allowing the regular hexagonal inserting block to be embedded therein is formed in the end of the knife handle; the fixing sleeve is arranged at the connecting joint of the knife handle and the extension rod in a sleeving manner; a locking member; according to the milling cutter, the extension rods are arranged, the extension rods and the cutter handle can be spliced through matching of the regular hexagonal insertion blocks and the first regular hexagonal insertion grooves, different extension rods can be spliced through matching of the regular hexagonal insertion blocks and the second regular hexagonal insertion grooves, the overall length of the milling cutter can be conveniently adjusted according to actual machining requirements, the cutter head does not need to be replaced, and the milling cutter is convenient to use. And the consistency of the tool bit before and after adjustment can be fully ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining tools, and in particular relates to a precision tool for machining turbine blades of an aero-engine. Background Art

[0002] In the structure of an aircraft, the turbine engine is an important component of the aircraft, and the turbine blades are important parts of the turbine engine. Milling cutters are needed when producing and processing aircraft engine turbine blades.

[0003] A milling cutter is a rotating tool with one or more teeth used for milling. It is mainly used to process planes, steps, grooves, forming surfaces and cut off workpieces on milling machines.

[0004] It was retrieved that in the prior art, a Chinese utility model patent with authorization announcement number CN215698294U discloses "a finishing milling cutter for machining aircraft engine turbine blades", including a tool clamping handle, a cutting part connected to the tool clamping handle, the cutting part having a tapered cutting edge arranged in sequence in the circumferential direction, a ball-end cutting edge connected to the tapered cutting edge, a chip groove spaced apart from the tapered cutting edge, and a chip removal groove spaced apart from the ball-end cutting edge, the tapered cutting edge is connected to the tool clamping handle, the chip removal groove is connected to the chip groove, and the tapered cutting edge is provided with a first clearance angle, a second clearance angle and a third clearance angle connected in sequence, so that turbine blades can be machined efficiently.

[0005] Although the finishing milling cutters in the prior art, including those mentioned above, can meet general operational requirements, in actual use, when processing workpieces, the length of the milling cutter should be selected according to the size of the processing area. When the area is large, a longer milling cutter should be selected to improve processing efficiency and shorten processing time. When the area is small, a shorter milling cutter can be used. However, the length of the milling cutter in the prior art is fixed and cannot be adjusted according to actual processing requirements. When it is necessary to replace milling cutters of different lengths, the tool holder needs to be connected to replace the entire milling cutter, and the replaced milling cutter also needs to have the same tool head, which makes replacement more troublesome.

[0006] In order to solve the above problems, the present application proposes a precision tool for machining aircraft engine turbine blades. Utility Model Content

[0007] In order to solve the above problems existing in the prior art, the utility model provides a precision tool for machining turbine blades of an aero-engine, 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 solutions: A precision tool for machining turbine blades of an aircraft engine, comprising a tool handle and a tool head which are integrally formed, and also comprising:

[0009] An extension rod, having a second regular hexagonal slot at one end of the extension rod;

[0010] A regular hexagonal plug block, the regular hexagonal plug block is fixed to one end of the extension rod away from the second regular hexagonal slot, and a first regular hexagonal slot for the regular hexagonal plug block to be inserted is provided at the end of the tool handle;

[0011] A fixing sleeve, the fixing sleeve being arranged at a connection node between the handle and the extension rod;

[0012] A locking piece, wherein the fixing sleeve is fixedly connected with the knife handle and the extension rod by means of the locking piece.

[0013] As a preferred technical solution of the present utility model, the sizes of the first regular hexagonal slot, the regular hexagonal plug block and the second regular hexagonal slot are all equal.

[0014] As a preferred technical solution of the utility model, the diameter of the extension rod is equal to the diameter of the tool handle and is the same as the inner diameter of the fixing sleeve.

[0015] As a preferred technical solution of the utility model, the fixing sleeve is fixedly connected to the knife handle and the extension rod by means of two symmetrically distributed locking pieces.

[0016] As a preferred technical solution of the utility model, the locking piece is a countersunk screw, which has a countersunk hole on the fixing sleeve, a first threaded hole on the tool handle, and a second threaded hole on the extension rod. The countersunk screw passes through the countersunk hole and is screwed into the first threaded hole and the second threaded hole by threaded engagement.

[0017] As a preferred technical solution of the utility model, the regular hexagonal plug and the extension rod are an integral structure formed by die-casting.

[0018] As a preferred technical solution of the present utility model, the length of the extension rod is equal to the length of the knife handle.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the utility model, by setting an extension rod, the extension rod and the tool handle can be spliced ​​by utilizing the cooperation of the regular hexagonal plug block and the first regular hexagonal slot. Different extension rods can be spliced ​​by utilizing the cooperation of the regular hexagonal plug block and the second regular hexagonal slot, which is convenient for adjusting the overall length of the milling cutter according to actual processing requirements. There is no need to replace the tool head, and the consistency of the tool head before and after adjustment can be fully ensured.

[0021] 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

[0022] 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:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the axonometric structure of the extension rod in the utility model.

[0026] In the figure: 1. tool handle; 11. tool head; 12. first regular hexagonal slot; 13. first threaded hole; 2. extension rod; 21. regular hexagonal plug; 22. second regular hexagonal slot; 23. second threaded hole; 3. fixing sleeve; 31. countersunk hole; 4. countersunk screw. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-Figure 3 The utility model provides the following technical solutions: a precision tool for machining turbine blades of an aircraft engine, comprising a tool handle 1 and a tool head 11 which are solidly integrated, and also comprising: an extension rod 2, a regular hexagonal plug block 21, a fixing sleeve 3 and a locking piece.

[0029] Further, by Figure 1 and Figure 2As shown, in this embodiment, a second regular hexagonal slot 22 is provided at one end of the extension rod 2, a regular hexagonal plug block 21 is fixed to the end of the extension rod 2 away from the second regular hexagonal slot 22, and a first regular hexagonal slot 12 for the regular hexagonal plug block 21 to be embedded is provided at the end of the tool handle 1, a fixed sleeve 3 is sleeved at the connection node between the tool handle 1 and the extension rod 2, and the fixed sleeve 3 is fixedly connected to the tool handle 1 and the extension rod 2 by a locking member. After adopting the above scheme, when in use, the tool handle 1 can be directly fixed on the tool seat of the machine tool for processing, or the tool handle 1 can be spliced ​​with one or more extension rods 2 and then It is fixed on the tool holder of the machine tool for processing. The extension rod 2 and the tool handle 1 can be spliced ​​by using the cooperation of the regular hexagonal plug block 21 and the first regular hexagonal slot 12. Different extension rods 2 can be spliced ​​by the cooperation of the regular hexagonal plug block 21 and the second regular hexagonal slot 22, which is convenient for adjusting the overall length of the milling cutter according to actual processing needs. There is no need to replace the cutter head 11, and the consistency of the cutter head 11 before and after adjustment can be fully ensured. At the same time, the extension rod 2 and the tool handle 1 are locked by the fixing sleeve 3 and the locking piece to ensure the stability of the combination of the extension rod 2 and the tool handle 1 or the combination of different extension rods 2.

[0030] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the sizes of the first regular hexagonal slot 12, the regular hexagonal plug block 21 and the second regular hexagonal slot 22 are all equal. After adopting the above design, when the regular hexagonal plug block 21 is inserted into the first regular hexagonal slot 12 or the second regular hexagonal slot 22, the outer wall of the regular hexagonal plug block 21 will abut against the inner wall of the first regular hexagonal slot 12 and the second regular hexagonal slot 22, thereby improving the stability of the combination and avoiding the generation of jitter.

[0031] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the diameter of the extension rod 2 is equal to the diameter of the knife handle 1, and is the same as the inner diameter of the fixed sleeve 3. After adopting the above design, when the fixed sleeve 3 is sleeved on the connection node between the knife handle 1 and the extension rod 2, the inner wall of the fixed sleeve 3 abuts against the outer wall of the knife handle 1 and the extension rod 2, further improving the stability of the combination.

[0032] Preferably, by Figure 1 and Figure 2 As shown, in this embodiment, the fixing sleeve 3 is fixedly connected to the handle 1 and the extension rod 2 by two symmetrically distributed locking members, and has high stability.

[0033] Optionally, by Figure 1-Figure 3As shown, in this embodiment, the locking member is a countersunk screw 4, with a countersunk hole 31 on the fixing sleeve 3, a first threaded hole 13 on the shank 1, and a second threaded hole 23 on the extension rod 2. The countersunk screw 4 passes through the countersunk hole 31 and is screwed into the first threaded hole 13 and the second threaded hole 23 by threaded engagement. Therefore, after the fixing sleeve 3 is sleeved on the connection node between the shank 1 and the extension rod 2, the countersunk screw 4 passes through the countersunk hole 31 and is screwed into the first threaded hole 13 and the second threaded hole 23 by threaded engagement, thereby achieving locking with high stability.

[0034] Preferably, by Figure 1-Figure 3 As shown, in this embodiment, the regular hexagonal plug block 21 and the extension rod 2 are an integral structure formed by die casting, and have high structural strength.

[0035] Optionally, by Figure 1 and Figure 2 As shown, in this embodiment, the length of the extension rod 2 is equal to the length of the handle 1. In actual use, it is preferred that the length of the extension rod 2 is equal to the length of the handle 1. The length of the extension rod 2 may also be slightly smaller than the length of the handle 1. In order to ensure the structural strength after adjustment and avoid bending damage, the length of the extension rod 2 should not be too long.

[0036] Components not described in detail herein are prior art.

[0037] Working principle and use process of the utility model: When the milling cutter of the utility model is used, the tool handle 1 can be directly fixed on the tool seat of the machine tool for processing, or the tool handle 1 can be spliced ​​with one or more extension rods 2 and then fixed on the tool seat of the machine tool for processing. The extension rod 2 and the tool handle 1 can be spliced ​​by the cooperation of the regular hexagonal plug block 21 and the first regular hexagonal slot 12. Different extension rods 2 can be spliced ​​by the cooperation of the regular hexagonal plug block 21 and the second regular hexagonal slot 22, which is convenient for adjusting the overall length of the milling cutter according to actual processing needs, without replacing the cutter head 11, and the consistency of the cutter head 11 before and after adjustment can be fully ensured;

[0038] In addition, after the extension rod 2 is docked with the shank 1, or different extension rods 2 are docked, the fixing sleeve 3 is installed at the connection node, and then the countersunk screw 4 is passed through the countersunk hole 31 and screwed into the first threaded hole 13 and the second threaded hole 23 by threaded engagement to achieve locking and improve the stability of the combination.

[0039] 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 precision tool for machining turbine blades of an aircraft engine, comprising a tool handle (1) and a tool head (11) which are integrally formed, characterized in that: Also includes: An extension rod (2), having a second regular hexagonal slot (22) at one end of the extension rod (2); A regular hexagonal plug block (21), the regular hexagonal plug block (21) being fixed to an end of the extension rod (2) away from the second regular hexagonal slot (22), and a first regular hexagonal slot (12) for the regular hexagonal plug block (21) to be inserted into the end of the tool handle (1); A fixing sleeve (3), wherein the fixing sleeve (3) is sleeved at a connection node between the knife handle (1) and the extension rod (2); A locking piece, wherein the fixing sleeve (3) is fixedly connected to the knife handle (1) and the extension rod (2) by means of the locking piece.

2. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The sizes of the first regular hexagonal slot (12), the regular hexagonal insert block (21) and the second regular hexagonal slot (22) are all equal.

3. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The diameter of the extension rod (2) is equal to the diameter of the knife handle (1), and is also the same as the inner diameter of the fixing sleeve (3).

4. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The fixing sleeve (3) is fixedly connected to the knife handle (1) and the extension rod (2) respectively by means of two symmetrically distributed locking pieces.

5. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The locking member is a countersunk screw (4), which has a countersunk hole (31) on the fixing sleeve (3), a first threaded hole (13) on the shank (1), and a second threaded hole (23) on the extension rod (2); the countersunk screw (4) passes through the countersunk hole (31) and is screwed into the first threaded hole (13) and the second threaded hole (23) by means of threaded engagement.

6. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The regular hexagonal plug block (21) and the extension rod (2) are an integral structure formed by die casting.

7. The precision tool for machining aero-engine turbine blades according to claim 1, characterized in that: The length of the extension rod (2) is equal to the length of the knife handle (1).

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