Fine milling clamp for thin-wall blade

Abstract

The utility model provides a thin-wall blade finish-milling machining clamp, and relates to the technical field of aviation blade precision machining. The thin-wall blade finish-milling machining clamp comprises an upper clamp base and a lower clamp base, the upper clamp base can be matched with the lower clamp base to form a clamping cavity, the portion, located in the clamping cavity, of the upper clamp base can be attached to the upper surface of a blade body in a profiling mode, and the portion, located in the clamping cavity, of the lower clamp base can be attached to the lower surface of the blade body in a profiling mode. A plurality of positioning screws are arranged on the lower clamp base, a plurality of through holes are formed in the upper clamp base, and the positioning screws can penetrate through the through holes in a one-to-one correspondence mode and are connected with the fastening nuts so that the blade body can be clamped in the clamping cavity. Based on the technical scheme of the utility model, the thin-wall blade finish-milling clamp can accurately position and clamp the thin-wall blade, and does not generate stress concentration and deformation on the thin-wall blade.

Description

TECHNICAL FIELD

[0001] The utility model relates to aviation blade precision machining technical field especially relates to a thin wall blade fine milling machining clamp. BACKGROUND

[0002] In the rapid development of aviation industry, the blade as the core component of the engine, its manufacturing precision and performance are directly related to the flight efficiency, fuel economy and safety of the whole aircraft. Especially in modern jet engine, the manufacturing precision and surface quality of thin wall blade directly affect the thrust and efficiency of the engine, and further affect the overall performance of the aircraft. Therefore, improving the machining precision and product quality of thin wall blade has become the key problem to be solved in the field of aviation blade manufacturing.

[0003] Traditional blade clamp, as an important auxiliary tool in the blade machining process, its main function is to ensure the stability and positioning accuracy of the blade in the machining process. However, when facing the high-precision and high-difficulty processing object such as thin wall blade, the limitations of traditional clamp gradually appear. Because the wall thickness of thin wall blade is thin, and the surface curvature changes greatly, it is easy to produce vibration and deformation due to uneven stress in the processing process. The traditional clamp often adopts rigid support and clamping mode, which is difficult to adapt to the complex change of blade surface, resulting in difficult to guarantee the machining precision and unstable product quality.

[0004] In addition, the traditional clamp often lacks optimization for the specific processing needs of thin wall blade in the design and manufacturing process, which not only increases the shape and size error in the processing process, but also may cause stress concentration and deformation of the blade in the processing process, further affecting the performance and service life of the blade. Therefore, it is necessary to design a thin wall blade fine milling machining clamp which can accurately position and clamp the thin wall blade without causing stress concentration and deformation of the thin wall blade. SUMMARY

[0005] In view of the problems in the prior art, the present application provides a thin wall blade fine milling machining clamp which can accurately position and clamp the thin wall blade without causing stress concentration and deformation of the thin wall blade.

[0006] The utility model provides a thin wall blade fine milling processing clamp, apply to thin wall blade, the thin wall blade includes blade body and the installation block connected to the opposite both ends of blade body, the thin wall blade fine milling processing clamp includes upper clamp base and lower clamp base, the upper clamp base can cooperate with lower clamp base to form the clamping cavity, the part of upper clamp base is located in the clamping cavity can be with the upper surface of blade body profiled and fits, the part of lower clamp base is located in the clamping cavity can be with the lower surface of blade body profiled and fits, be equipped with a plurality of positioning screw rod on lower clamp base, a plurality of through -hole is seted up on upper clamp base, a plurality of positioning screw rod can pass through a plurality of through -hole one by one and is connected with the fastening nut to clamp blade body in the clamping cavity.

[0007] As the further improvement of the above technical scheme:

[0008] The thin wall blade fine milling processing clamp, further, the both ends of the clamping cavity form clamping grooves, and the clamping grooves are used for clamping the installation block.

[0009] The above technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the utility model can be achieved.

[0010] Compared with the prior art, the thin wall blade fine milling processing clamp provided by the utility model has the following beneficial effects: during use, first, the blade body of the thin wall blade is placed on the part of the lower clamp base located in the clamping cavity, then, the upper clamp base is positioned and placed on the lower clamp base, a plurality of positioning screw rods pass through a plurality of through -holes one by one and are connected with fastening nuts to clamp the blade body in the clamping cavity, so that the thin wall blade after rough machining is wrapped with industrial rubber clay, and is pressed into a preset shape in the upper and lower clamp cavities; when the surface of the thin wall blade needs to be machined, the upper clamp base or the lower clamp base is removed, the blade body is positioned and placed on the lower clamp base or the upper clamp base, and finally, fine milling cutters are used for fine milling machining. Since the positioning surface of the clamp base is closely attached to the surface of the blade body, the profiling method design can significantly improve the positioning accuracy of the blade body, helps to reduce errors and deformation in the machining process, and improves the machining quality; the profiling method design can optimize the distribution of clamping force according to the shape and curvature of the blade body, through reasonable design of the positioning surface of the clamp base and the clamping mechanism, uniform distribution of clamping force can be realized, and stress and deformation of the blade in the machining process are reduced; compared with some complex clamp design methods, the profiling method design has a relatively simple structure and low manufacturing cost, which helps to reduce production cost and improve production efficiency.

[0011] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0013] The present application will be described in more detail in the following based on the embodiments and with reference to the drawings. Among them:

[0014] Figure 1 The structure schematic diagram of the thin-wall blade provided by the embodiment of the present application is shown;

[0015] Figure 2 The structure schematic diagram of the lower clamp base of the thin-wall blade fine milling processing clamp provided by the embodiment of the present application is shown;

[0016] Figure 3 The structure schematic diagram of the upper clamp base of the thin-wall blade fine milling processing clamp provided by the embodiment of the present application is shown.

[0017] In the drawings, the same components use the same reference numerals. The drawings are not in actual proportion.

[0018] Explanation of reference numerals:

[0019] 110-upper clamp base, 111-through hole, 120-lower clamp base, 121-positioning screw, 130-clamping cavity, 140-clamping groove, 210-blade body, 220-mounting block. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation to the present application.

[0021] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0022] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0023] In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the utility model, unless otherwise specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0025] The utility model will be further described below with reference to the drawings.

[0026] The utility model embodiment provides a thin wall blade fine milling processing clamp, can carry out accurate positioning clamping to thin wall blade, and will not produce stress concentration and deformation to thin wall blade.

[0027] The thin-wall blade precision milling clamp provided by the embodiment of the utility model is applied to a thin-wall blade, please refer to Figure 1 , the thin-wall blade comprises a blade body 210 and mounting blocks 220 connected to opposite ends of the blade body 210, the thin-wall blade precision milling clamp comprises an upper clamp seat 110 and a lower clamp seat 120, please refer to Figure 2 and Figure 3 , the upper clamp seat 110 can cooperate with the lower clamp seat 120 to form a clamping cavity 130, the part of the upper clamp seat 110 located in the clamping cavity 130 can be profiled and attached to the upper surface of the blade body 210, the part of the lower clamp seat 120 located in the clamping cavity 130 can be profiled and attached to the lower surface of the blade body 210, a plurality of positioning screws 121 are arranged on the lower clamp seat 120, a plurality of through holes 111 are formed in the upper clamp seat 110, the plurality of positioning screws 121 can pass through the plurality of through holes 111 one by one and be connected with fastening nuts to clamp the blade body 210 in the clamping cavity 130.

[0028] In use, first, the blade body 210 of the thin-wall blade is placed on the part of the lower clamp seat 120 located in the clamping cavity 130, then the upper clamp seat 110 is positioned and placed on the lower clamp seat 120, the plurality of positioning screws 121 pass through the plurality of through holes 111 one by one and are connected with the fastening nuts to clamp the blade body 210 in the clamping cavity 130, so that the rough-machined thin-wall blade is wrapped with industrial modeling clay after the blade, and is pressed into a preset shape in the upper and lower clamp cavities; when the surface of the thin-wall blade needs to be machined, the upper clamp seat 110 or the lower clamp seat 120 is removed, the blade body 210 is positioned and placed on the lower clamp seat 120 or the upper clamp seat 110, and finally, a precision milling tool is used for precision milling.

[0029] Because the positioning surface of the clamp seat is closely attached to the surface of the blade body 210, the profiled design can significantly improve the positioning accuracy of the blade body 210, help to reduce errors and deformation in the machining process, and improve the machining quality; the profiled design can optimize the distribution of the clamping force according to the shape and curvature of the blade body 210, through reasonable design of the positioning surface of the clamp seat and the clamping mechanism, uniform distribution of the clamping force can be realized, and stress and deformation of the blade in the machining process are reduced; compared with some complex clamp design methods, the profiled design has a relatively simple structure and low manufacturing cost, which helps to reduce production cost and improve production efficiency.

[0030] The thin-wall blade precision milling clamp provided by the embodiment of the utility model is further provided, please refer to Figure 1 and Figure 2 , the two ends of the clamping cavity 130 are formed with clamping grooves 140, and the clamping grooves 140 are used for clamping the mounting blocks 220. The mounting blocks 220 are clamped in the clamping grooves 140, which further improves the clamping stability and positioning accuracy of the thin-wall blade.

[0031] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

Claims

1. A precision milling fixture for thin-walled blades, applied to thin-walled blades, the thin-walled blades comprising a blade body (210) and mounting blocks (220) connected to opposite ends of the blade body (210), characterized in that, The thin-walled blade precision milling fixture includes an upper fixture seat (110) and a lower fixture seat (120). The upper fixture seat (110) can cooperate with the lower fixture seat (120) to form a clamping cavity (130). The part of the upper fixture seat (110) located in the clamping cavity (130) can conformally fit the upper surface of the blade body (210). The part of the lower fixture seat (120) located in the clamping cavity (130) can conformally fit the lower surface of the blade body (210). The lower fixture seat (120) is provided with multiple positioning screws (121). The upper fixture seat (110) is provided with multiple through holes (111). The multiple positioning screws (121) can pass through the multiple through holes (111) one by one and be connected to the fastening nut to clamp the blade body (210) in the clamping cavity (130).

2. The precision milling fixture for thin-walled blades according to claim 1, characterized in that, The clamping cavity (130) has clamping grooves (140) formed at both ends, and the clamping grooves (140) are used to clamp the mounting block (220).

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