A precision forged blade shaft grinding fixture

Abstract

This utility model discloses a grinding fixture for precision forged blade shafts, relating to the field of processing equipment technology. It includes a base and a main body, the main body being composed of a first section and a second section. The first section is fixedly connected to the base. The first section is equipped with a K3 fixing assembly, which consists of a set of K3 positioning blocks and K3 clamping blocks. The K3 clamping blocks have threaded holes that connect to K3 clamping screws. The second section has a back-arc fixing position and a pressure plate fixing position, the back-arc fixing position being connected to the back-arc fixing plate by screws. The back-arc fixing plate has axial positioning holes that connect to axial positioning balls. The pressure plate fixing position has a pin fixing position, which is connected to the pressure plate by an internally threaded cylindrical pin. The pressure plate is connected to the pressure plate fixing position by screws. An inner arc clamping plate is fixed to the pressure plate. By setting the back-arc fixing plate, pressure plate, inner arc clamping plate, and K3 fixing assembly, reliable positioning of the precision forged blade shaft is achieved, ensuring high quality and uniformity after grinding.

Description

Technical Field

[0001] This utility model relates to the technical field of precision forging blade shaft and shank processing equipment, and in particular to a precision forging blade shaft and shank grinding fixture. Background Technology

[0002] Precision-forged blades are key components of aero-engines, primarily used in the fan and compressor sections. They possess characteristics such as high dimensional accuracy, excellent mechanical properties, high temperature resistance, high pressure resistance, and corrosion resistance, making them crucial to engine performance, safety, and reliability. Blade precision forging refers to a blade manufacturing method where the blade profile and inner surfaces of the blade flange are not machined; instead, precision forging achieves the dimensional accuracy required by the design drawings. A small amount of excess material in the blade profile is removed through chemical milling and polishing, and only the shaft shank is machined. When grinding the shaft shank of such precision-forged blades, pneumatic clamping is typically used; however, this clamping method has the following disadvantages and limitations:

[0003] (1) The installation process is cumbersome and the preparation time is too long, resulting in low efficiency;

[0004] (2) The precision after grinding is low, which does not meet the precision requirements of the drawing, and may even render the blade shaft unusable.

[0005] (3) The uniformity after grinding is low. Due to the overly complicated installation process, the size of each part is different after grinding, making it difficult to achieve uniformity. Utility Model Content

[0006] To address the technical problems mentioned in the background art, this utility model provides a precision forging blade shaft grinding fixture.

[0007] To achieve the above objectives, this utility model provides a precision forging blade shaft grinding fixture, comprising: a base and a main body, the main body being composed of a first portion and a second portion, the first portion being fixedly connected to the base; a K3 fixing assembly is provided on the first portion, the K3 fixing assembly being composed of a set of correspondingly arranged K3 positioning blocks and K3 clamping blocks, the K3 clamping blocks being provided with threaded holes, the threaded holes being connected to K3 clamping screws; a back arc fixing position and a pressure plate fixing position are provided on the second portion, the back arc fixing position being fixedly connected to the back arc fixing plate by screws; an axial positioning hole is provided on the back arc fixing plate, the axial positioning hole being connected to one end of an axial positioning ball; a pin fixing position is provided on one side of the pressure plate fixing position, the pin fixing position being connected to one side of the pressure plate by an internally threaded cylindrical pin, the other side of the pressure plate being connected to the other side of the pressure plate fixing position by screws; an inner arc clamping plate is fixedly connected to the inner side of the pressure plate.

[0008] As a preferred embodiment of this utility model, a counterweight groove is provided between the K3 fixing component and the base, and three counterweight grooves are provided, which are evenly distributed on the periphery of the first part.

[0009] As a preferred embodiment of the present invention, the base is provided with a positioning boss, which is sleeved on the inner side of the first part.

[0010] In a preferred embodiment of this utility model, the threaded hole is provided with an internal thread, the K3 clamping screw is provided with an external thread, and the K3 clamping screw passes through the threaded hole and is connected to the threaded hole by the thread.

[0011] As a preferred embodiment of this utility model, the top of the K3 clamping screw is provided with a semi-circular protective part.

[0012] As a preferred embodiment of this utility model, a fixed position K3 is reserved between the protective part and the K3 positioning block.

[0013] As a preferred embodiment of this utility model, the K3 positioning block has a T-shaped structure.

[0014] In a preferred embodiment of this utility model, the pressure plate and the inner arc clamping plate are fixedly connected by screws.

[0015] In a preferred embodiment of this utility model, the first portion is fixedly connected to the base by screws.

[0016] Compared with the prior art, the present invention has the following beneficial effects: the device can reliably position the precision forged blade shaft by setting the back arc fixing plate, pressure plate, inner arc clamping plate and K3 fixing assembly, making the installation process more convenient and efficient, while ensuring the high quality and uniformity after grinding. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a top view of an embodiment of the present utility model;

[0020] Figure 3This is a schematic diagram of the structure of the K3 clamping block in this utility model;

[0021] Explanation of reference numerals in the attached drawings: 1-base; 11-bore; 2-main body; 21-first section; 22-second section; 3-K3 fixing assembly; 30-K3 fixing point; 31-K3 positioning block; 32-K3 clamping block; 321-threaded hole; 322-K3 clamping screw; 323-protective part; 4-back arc fixing position; 5-pressure plate fixing position; 51-pin fixing position; 6-back arc fixing plate; 61-axial positioning hole; 62-axial positioning ball; 7-internal threaded cylindrical pin; 8-pressure plate; 9-arc clamping plate; 10-counterweight groove; 100-precision forged blade shaft. Detailed Implementation

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Please refer to the instruction manual appendix. Figure 1-3A precision forging blade shaft grinding fixture includes: a base 1 and a main body 2. The main body 2 is composed of a first portion 21 and a second portion 22. The first portion 21 is fixedly connected to the base 1. The base 1 is provided with a positioning boss 11, which is sleeved inside the first portion 21. The first portion 21 is provided with a K3 fixing assembly 3, which is composed of a set of corresponding K3 positioning blocks 31 and K3 clamping blocks 32. The K3 clamping blocks 32 are provided with threaded holes 321, and internal threads are provided in the threaded holes 321. The K3 clamping screws 322 are provided with external threads and pass through the threaded holes 321 and are connected to the threaded holes 321 by threads. The top of the nail 322 is provided with a semi-circular protective part 323; a K3 point fixing position 30 is reserved between the protective part 323 and the K3 positioning block 31; the K3 positioning block 31 has a T-shaped structure; the second part 22 is provided with a back arc fixing position 4 and a pressure plate fixing position 5, the back arc fixing position 4 and the back arc fixing plate 6 are fixedly connected by screws; the back arc fixing plate 6 is provided with an axial positioning hole 61, the axial positioning hole 61 is connected to one end of the axial positioning ball 62; a pin fixing position 51 is provided on one side of the pressure plate fixing position 5, the pin fixing position 51 is connected to one side of the pressure plate 8 by an internal threaded cylindrical pin 7, and the other side of the pressure plate 8 is connected to the other side of the pressure plate fixing position 5 by screws; an inner arc pressing plate 9 is fixedly connected to the inner side of the pressure plate 8.

[0025] The base 1 of the fixture connects the grinding machine spindle and the main body 2 of the fixture. A positioning boss 11 protrudes from the disc and is axially positioned with the main body of the fixture. At the same time, three M8 screws are used to fix the main body of the fixture to the base 1 from the base 1 towards the main body 2. The main body of the fixture is machined from a hollow cylinder. The fixture has slots for the K3 positioning block 31 and the K3 clamping block 32. The K3 positioning block 31 uses a T-shaped block to position the blade. It is assembled with the main body of the fixture using two screws. During assembly, it is necessary to ensure that the arc surface of the K3 positioning block 31 and the screws do not exceed the diameter of the main body of the fixture 2. The part of the K3 positioning block 31 that contacts the blade is machined with a round head using a contour surface machining method to ensure effective positioning of the blade. The K3 clamping screw 322 uses an M8X60 socket head cap screw to clamp the K3 point. The screw needs to be further machined to create a semi-circular protective part 323 to prevent damage to the blade. Part of the thread of the K3 clamping screw 322 is removed in the middle to facilitate unscrewing. At the same time, the K3 clamping screw 322 is fixed to the K3 clamping block 32. The K3 clamping block 32 is an arc-shaped block with a threaded hole 321 and two through holes. It is connected to the fixture by two M8 screws. The threaded hole 321 is used to control the K3 clamping screw 322. The upper half of the fixture body 2 is a hollow cylinder with half of its outer diameter removed. A pin fixing position 51 is provided on one side of the pressure plate fixing position 5. The pin fixing position 51 is connected to one side of the pressure plate 8 through an internal threaded cylindrical pin 7, so that the pressure plate 8 can rotate around the internal threaded cylindrical pin 7, which facilitates the insertion of the blade. There are two through holes on the side of the pressure plate 8. The pressure plate 8 is threaded to the body 2 through an internal hexagonal thread. There is also a through hole in the middle of the pressure plate 8. The inner arc pressing plate 9 is threaded to the pressure plate 8 through it, which can press the blade. At the same time, this screw can make the inner arc pressing plate 9 a detachable and replaceable structure. The arc on the inner arc pressing plate 9 is slightly larger than the arc radius of the blade edge plate. The fixture has two protruding positioning blocks on the top for positioning the back arc fixing plate 6. There are reserved pads and feeler gauges on both sides for adjustment. At the same time, the fixture body 2 has four threaded holes on the top. The back arc fixing plate 6 is threadedly connected to the fixture body 2 through these four threaded holes. The back arc fixing plate 6 has an axial positioning hole 61 for fixing to the axial positioning ball 62.

[0026] When installing the precision forged blade shaft 100, first flip open the pressure plate 8 and loosen the screws on the K3 clamping block 32. Then, with the small end of the precision forged blade 100 facing inward, insert it into the fixture body 2 along the direction away from the base 1 and closer to the base 1. Next, close the inner arc clamping plate 9 and tighten the fixture pressure plate 8 and the inner arc clamping plate 9 with M8*16 socket head cap screws. Then, position the back arc fixing plate 6 between the blade shaft 100 and the fixture body 2 using M8*20 socket head cap screws to ensure a firm fit between the blade shaft 100 and the fixture body 2.

[0027] Furthermore, a counterweight groove 10 is provided between the K3 fixing component 3 and the base 1. There are three counterweight grooves 10, which are evenly distributed around the periphery of the first portion 21. Rectangular counterweight grooves are opened in three directions to ensure that the center of mass of the fixture is on the same axis as the grinding machine spindle.

[0028] As can be seen from the above description, the above-described embodiments of this utility model achieve the following technical effects: the device can reliably position the precision forged blade shaft 100 by setting the back arc fixing plate 6, the pressure plate 8, the inner arc clamping plate 9 and the K3 fixing component 3, while ensuring the high quality and uniformity after grinding.

[0029] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A precision-forged blade shaft handle grinding jig characterized by, include: The base (1) and the main body (2) are provided. The main body (2) is composed of a first part (21) and a second part (22). The first part (21) is fixedly connected to the base (1). A K3 fixing component (3) is provided on the first part (21). The K3 fixing component (3) is composed of a set of corresponding K3 positioning blocks (31) and K3 clamping blocks (32). A threaded hole (321) is provided on the K3 clamping block (32), and the threaded hole (321) is connected to a K3 clamping screw (322). A back arc fixing position (4) and a pressure plate fixing are provided on the second part (22). Positioning (5), the back arc fixing position (4) and the back arc fixing plate (6) are fixedly connected by screws; the back arc fixing plate (6) is provided with an axial positioning hole (61), and the axial positioning hole (61) is connected to one end of the axial positioning ball (62); a pin fixing position (51) is provided on one side of the pressure plate fixing position (5), and the pin fixing position (51) is connected to one side of the pressure plate (8) by an internal thread cylindrical pin (7), and the other side of the pressure plate (8) is connected to the other side of the pressure plate fixing position (5) by screws; an inner arc pressing plate (9) is fixedly connected to the inner side of the pressure plate (8).

2. A precision-forged vane shaft grinding jig according to claim 1, characterized in that: A counterweight groove (10) is provided between the K3 fixing component (3) and the base (1). There are three counterweight grooves (10), and the three counterweight grooves (10) are evenly distributed on the periphery of the first part (21).

3. A precision-forged vane shaft grinding fixture according to claim 1, characterized in that: The base (1) is provided with a positioning boss (11), which is sleeved on the inner side of the first part (21).

4. A precision-forged vane shaft grinding fixture according to claim 1, characterized in that: The threaded hole (321) is provided with an internal thread, and the K3 clamping screw (322) is provided with an external thread. The K3 clamping screw (322) passes through the threaded hole (321) and is connected to the threaded hole (321) by the thread.

5. A precision-forged vane shaft grinding fixture according to claim 4, characterized in that: The top of the K3 clamping screw (322) is provided with a semi-circular protective part (323).

6. A precision-forged vane shaft grinding fixture according to claim 5, characterized in that: A K3 point fixing position (30) is reserved between the protective part (323) and the K3 positioning block (31).

7. A precision forging blade shaft grinding fixture according to claim 6, characterized in that; The K3 positioning block (31) has a T-shaped structure.

8. A precision forging blade shaft grinding fixture according to claim 1, characterized in that: The pressure plate (8) and the inner arc pressing plate (9) are fixedly connected by screws.

9. A precision forging blade shaft grinding fixture according to claim 1, characterized in that: The first part (21) is fixedly connected to the base (1) by screws.

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