A high-pressure turbine blade ball head positioning fixture

Abstract

This utility model discloses a ball-head positioning fixture for a high-pressure turbine blade. It includes a base plate, a central positioning mechanism, a central support mechanism, a tail positioning mechanism, a clamping mechanism, and a pressing mechanism. The base plate has the central positioning mechanism, central support mechanism, and pressing mechanism positioned at corresponding locations on the middle of the blade, and a tail positioning mechanism positioned at a corresponding location on the base plate at the tail of the blade. Both the central and tail positioning mechanisms are positioned opposite to their respective clamping mechanisms. The central support mechanism is positioned opposite to the pressing mechanism, with the central support mechanism corresponding to the two sides of the bottom surface of the blade's middle section, and the pressing mechanism corresponding to the two sides of the top surface of the blade's middle section. The central support mechanism and the pressing mechanism together clamp the middle section of the blade. The central positioning mechanism contacts the side and bottom surfaces of the blade's middle section, and the tail positioning mechanism contacts the side and bottom surfaces of the blade's tail section.

Description

Technical Field

[0001] This utility model belongs to the field of turbine blade manufacturing technology, and specifically relates to a ball head positioning tool for high-pressure turbine blades. Background Technology

[0002] During the production of high-pressure turbine first-stage blades, tapered holes need to be machined at both ends. Due to the irregular shape of the blade's midsection, existing fixtures cannot effectively position this area, affecting the machining accuracy of the tapered holes. Designing a fixture that can better position the blade's midsection is a problem that needs to be solved.

[0003] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0004] The purpose of this utility model is to provide a high-pressure turbine blade ball head positioning tool, thereby overcoming the defects in the prior art.

[0005] To achieve the above objectives, this utility model provides a high-pressure turbine blade ball joint positioning fixture, including a base plate, a central positioning mechanism, a central support mechanism, a tail positioning mechanism, a clamping mechanism, and a pressing mechanism. The base plate has a central positioning mechanism, a central support mechanism, and a pressing mechanism positioned at corresponding positions in the middle of the blade, and a tail positioning mechanism positioned at a corresponding position in the tail of the blade. The central positioning mechanism and the tail positioning mechanism are both positioned opposite to their respective clamping mechanisms. The central support mechanism is positioned opposite to the pressing mechanism. The central support mechanism is positioned opposite to the central... The two sides of the bottom surface of the blade correspond to each other, and the clamping mechanism corresponds to the two sides of the top surface of the blade. The middle support mechanism and the clamping mechanism together clamp the middle part of the blade. The middle positioning mechanism contacts the side and bottom surfaces of the middle part of the blade, and the tail positioning mechanism contacts the side and bottom surfaces of the tail part of the blade, respectively. The tightening mechanism contacts the side, head, and tail of the middle part of the blade, respectively. The middle positioning mechanism and the tail positioning mechanism adopt ball head positioning. The blade is positioned and fixed by the middle positioning mechanism, the middle support mechanism, the tail positioning mechanism, the tightening mechanism, and the clamping mechanism.

[0006] Preferably, in the technical solution, the central support mechanism includes a first support bolt and a second support bolt. The first support bolt and the second support bolt are set at the same height on the base plate, and the first support bolt and the second support bolt respectively contact the two sides of the bottom surface of the middle part of the blade.

[0007] Preferably, in the technical solution, the central positioning mechanism includes a bottom ball-head positioning pin, a rear side ball-head positioning pin, and a right side ball-head positioning pin. Each of these three pins is mounted on a corresponding pin seat. There are two bottom ball-head positioning pins mounted on a common pin seat. The bottom ball-head positioning pin contacts the bottom surface of the blade's center. The rear side ball-head positioning pin faces the rear side of the blade's center and contacts the rear side of the blade's center. The right side ball-head positioning pin faces the right side of the blade's center and contacts the right side of the blade's center. The extension lines of the rear side ball-head positioning pin and the right side ball-head positioning pin intersect.

[0008] Preferably, in the technical solution, the tail positioning mechanism includes a tail bottom ball head positioning pin and a tail side ball head positioning pin. The tail bottom ball head positioning pin and the tail side ball head positioning pin are set on corresponding pin seats. The extension lines of the tail bottom ball head positioning pin and the tail side ball head positioning pin intersect. The tail bottom ball head positioning pin contacts the lower edge of the tail end of the blade, and the tail side ball head positioning pin contacts the side edge of the tail end of the blade.

[0009] Preferably, in the technical solution, the tightening mechanism includes a first tightening bolt, a second tightening bolt, and a third tightening bolt. The first tightening bolt, the second tightening bolt, and the third tightening bolt are respectively disposed on corresponding bolt seats. The first tightening bolt is disposed opposite to the ball head locating pin on the right side and contacts the end face of the blade head. The second tightening bolt is disposed opposite to the ball head locating pin on the rear side and contacts the front side of the middle part of the blade. The third tightening bolt is disposed opposite to the ball head locating pin on the tail side and contacts the side of the tail end of the blade.

[0010] Preferably, in the technical solution, the clamping mechanism includes a first pressure plate and a second pressure plate. The first pressure plate and the second pressure plate are set on corresponding pressure plate brackets. The first pressure plate and the second pressure plate are at the same height. The first pressure plate and the second pressure plate are respectively arranged opposite to the first diagonal brace bolt and the second diagonal brace bolt. The first pressure plate and the second pressure plate, together with the first support bolt and the second support bolt, clamp the middle part of the blade.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The blade's irregularly shaped structure is stably positioned and fixed through a central positioning mechanism, a central support mechanism, a tail positioning mechanism, a clamping mechanism, and a pressing mechanism, ensuring the machining accuracy of the tapered holes at both ends of the blade. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the high-pressure turbine blade ball head positioning tooling structure of this utility model; Figure 2 This is the main view of the high-pressure turbine blade ball head positioning fixture of this utility model; Figure 3 This is a top view of the high-pressure turbine blade ball head positioning fixture of this utility model. Detailed Implementation

[0013] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0014] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0015] like Figure 1-3 As shown, a high-pressure turbine blade ball head positioning fixture includes a base plate 1, a central positioning mechanism 2, a central support mechanism 3, a tail positioning mechanism 4, a clamping mechanism 5, and a pressing mechanism 6. The base plate 1 has the central positioning mechanism 2, central support mechanism 3, and pressing mechanism 6 positioned at corresponding locations in the middle of the blade, and a tail positioning mechanism 4 positioned at a corresponding location in the tail of the blade. Both the central positioning mechanism 2 and tail positioning mechanism 4 are positioned opposite to their respective clamping mechanisms 5. The central support mechanism 3 is positioned opposite to the pressing mechanism 6, with the central support mechanism 3 corresponding to the two sides of the bottom surface of the blade's central portion, and the pressing mechanism 6 corresponding to the two sides of the top surface of the blade's central portion. The central support mechanism 3 and the pressing mechanism 6 together clamp the middle of the blade. The central positioning mechanism 2 contacts the side and bottom surfaces of the blade's central portion, and the tail positioning mechanism 4 contacts the side and bottom surfaces of the blade's tail portion. The clamping mechanism 5 contacts the side, head, and tail of the blade's central portion.

[0016] The central support mechanism 3 includes a first support bolt 30 and a second support bolt 31. The first support bolt 30 and the second support bolt 31 are set at the same height on the base plate 1, and the first support bolt 30 and the second support bolt 31 respectively contact the two sides of the bottom surface of the middle part of the blade.

[0017] The central positioning mechanism 2 includes a bottom ball-head positioning pin 20, a rear side ball-head positioning pin 21, and a right side ball-head positioning pin 22. Each of these pins is mounted on a corresponding pin seat. There are two bottom ball-head positioning pins 20, both mounted on a common pin seat. The bottom ball-head positioning pins 20 contact the bottom surface of the blade's center. The rear side ball-head positioning pin 21 faces the rear side of the blade's center and contacts the rear side of the blade's center. The right side ball-head positioning pin 22 faces the right side of the blade's center and contacts the right side of the blade's center. The extension lines of the rear side ball-head positioning pin 21 and the right side ball-head positioning pin 22 intersect.

[0018] The tail positioning mechanism 4 includes a tail bottom ball joint positioning pin 40 and a tail side ball joint positioning pin 41. The tail bottom ball joint positioning pin 40 and the tail side ball joint positioning pin 41 are set on corresponding pin seats. The extension lines of the tail bottom ball joint positioning pin 40 and the tail side ball joint positioning pin 41 intersect. The tail bottom ball joint positioning pin 40 contacts the lower edge of the tail end of the blade, and the tail side ball joint positioning pin 41 contacts the side edge of the tail end of the blade.

[0019] The clamping mechanism 5 includes a first clamping bolt 50, a second clamping bolt 51, and a third clamping bolt 52. The first clamping bolt 50, the second clamping bolt 51, and the third clamping bolt 52 are respectively mounted on corresponding bolt seats. The first clamping bolt 50 is positioned opposite to the ball head locating pin 22 on the right side and is in contact with the end face of the blade head. The second clamping bolt 51 is positioned opposite to the ball head locating pin 21 on the rear side and is in contact with the front side of the middle part of the blade. The third clamping bolt 52 is positioned opposite to the ball head locating pin 41 on the tail side and is in contact with the side of the tail end of the blade.

[0020] The clamping mechanism 6 includes a first pressure plate 60 and a second pressure plate 61. The first pressure plate 60 and the second pressure plate 61 are mounted on corresponding pressure plate brackets 62. The first pressure plate 60 and the second pressure plate 61 are at the same height. The first pressure plate 60 and the second pressure plate 61 are respectively positioned opposite to the first diagonal brace bolt 30 and the second diagonal brace bolt 31. The first pressure plate 60 and the second pressure plate 61, together with the first support bolt 30 and the second support bolt 31, clamp the middle part of the blade.

[0021] In use, the first-stage blade is placed on the fixture. The first support bolt 30 and the second support bolt 31 support the bottom surface of the middle of the first-stage blade. At the same time, the two bottom ball-head locating pins 20, the rear side ball-head locating pin 21, and the right side ball-head locating pin 22 provide four-point positioning for the middle of the blade, while the tail bottom ball-head locating pin 40 and the tail side ball-head locating pin 41 provide two-point positioning for the tail end of the blade. The blade is precisely positioned through six-point positioning. Then, the first pressure plate 60 and the second pressure plate 61 press down the top surface of the middle of the blade, and with the cooperation of the first tightening bolt 50, the second tightening bolt 51, and the third tightening bolt 52, the entire blade is firmly fixed on the fixture, stably positioning and fixing the irregular structure in the middle of the blade, and ensuring the machining accuracy of the tapered holes at both ends of the blade.

[0022] The description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical applications, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A high-pressure turbine blade ball joint positioning fixture, characterized in that: The device includes a base plate, a central positioning mechanism, a central support mechanism, a tail positioning mechanism, a clamping mechanism, and a pressing mechanism. The base plate has a central positioning mechanism, a central support mechanism, and a pressing mechanism positioned at corresponding locations in the middle of the blade, and a tail positioning mechanism positioned at a corresponding location in the tail of the blade. Both the central and tail positioning mechanisms are positioned opposite to their respective clamping mechanisms. The central support mechanism is positioned opposite to the pressing mechanism, with the central support mechanism corresponding to the two sides of the bottom surface of the blade's central portion, and the pressing mechanism corresponding to the two sides of the top surface of the blade's central portion. The central support mechanism and the pressing mechanism together clamp the middle of the blade. The central positioning mechanism contacts the side and bottom surfaces of the blade's central portion, and the tail positioning mechanism contacts the side and bottom surfaces of the blade's tail portion. The clamping mechanism contacts the side, head, and tail surfaces of the blade's central portion. The central and tail positioning mechanisms employ ball-joint positioning.

2. The high-pressure turbine blade ball joint positioning fixture according to claim 1, characterized in that: The central support mechanism includes a first support bolt and a second support bolt. The first support bolt and the second support bolt are set at the same height on the base plate, and the first support bolt and the second support bolt respectively contact the two sides of the bottom surface of the middle part of the blade.

3. The high-pressure turbine blade ball joint positioning fixture according to claim 2, characterized in that: The central positioning mechanism includes a bottom ball-head locating pin, a rear side ball-head locating pin, and a right side ball-head locating pin. Each of these pins is mounted on a corresponding pin seat. There are two bottom ball-head locating pins, both mounted on a common pin seat. The bottom ball-head locating pin contacts the bottom surface of the blade's center. The rear side ball-head locating pin faces the rear side of the blade's center and contacts the rear side of the blade's center. The right side ball-head locating pin faces the right side of the blade's center and contacts the right side of the blade's center. The extension lines of the rear side and right side ball-head locating pins intersect.

4. The high-pressure turbine blade ball joint positioning fixture according to claim 3, characterized in that: The tail positioning mechanism includes a tail bottom ball joint positioning pin and a tail side ball joint positioning pin. The tail bottom ball joint positioning pin and the tail side ball joint positioning pin are set on corresponding pin seats. The extension lines of the tail bottom ball joint positioning pin and the tail side ball joint positioning pin intersect. The tail bottom ball joint positioning pin contacts the lower edge of the tail end of the blade, and the tail side ball joint positioning pin contacts the side edge of the tail end of the blade.

5. The high-pressure turbine blade ball joint positioning fixture according to claim 4, characterized in that: The tightening mechanism includes a first tightening bolt, a second tightening bolt, and a third tightening bolt. The first tightening bolt, the second tightening bolt, and the third tightening bolt are respectively mounted on corresponding bolt seats. The first tightening bolt is positioned opposite to the ball head locating pin on the right side and contacts the end face of the blade head. The second tightening bolt is positioned opposite to the ball head locating pin on the rear side and contacts the front side of the middle part of the blade. The third tightening bolt is positioned opposite to the ball head locating pin on the tail side and contacts the side of the tail end of the blade.

6. The high-pressure turbine blade ball joint positioning fixture according to claim 2, characterized in that: The clamping mechanism includes a first pressure plate and a second pressure plate. The first pressure plate and the second pressure plate are set on corresponding pressure plate brackets. The first pressure plate and the second pressure plate are at the same height. The first pressure plate and the second pressure plate are respectively set opposite to the first diagonal brace bolt and the second diagonal brace bolt. The first pressure plate and the second pressure plate, together with the first support bolt and the second support bolt, clamp the middle part of the blade.

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