An engine blade machining clamping device and method

Abstract

The present invention discloses an engine blade processing and clamping device and method, which adopts a blade clamping device to clamp the blade to be processed, and sets an adapter plate on the mounting support, through which a plurality of positioning holes are set on the adapter plate, and a plurality of spring positioning pins are set at the bottom of the mounting support, each spring positioning pin corresponds to a positioning hole, and the blade clamping device positions and clamps the blade body, and the rotation center of the blade clamping device after clamping the blade is the axis of the blade body along the blade height direction, and the adapter plate and the mounting support are rotated, and the positioning hole of a pair of spring positioning pins corresponds to a type of blade serial number, thereby meeting the needs of blade clamping with different torsion angles, and realizing the purpose of processing different blade mounting plates with the same processing procedure. The present invention has a simple structure, and batch processing can be achieved by repeating the above-mentioned actions after processing a blade with a serial number; in the process of processing blades with all serial numbers, only the first serial number blade debugging program is required, which saves debugging time and eliminates blade tolerance caused by debugging.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine blade processing, and in particular relates to an engine blade processing clamping device and method. Background Art

[0002] Blades are core components of aircraft engines. With the development of aviation technology, the number of fan and compressor stages is decreasing. Therefore, while blades of similar stages share the same structure and similar tenon and mounting plate dimensions, blades of the same stage can differ slightly, with some blades exhibiting subtle differences. Currently, different fixtures, programs, and measuring tools are used to process different blade parts domestically. This large number of fixtures, CNC programs, and measuring tools creates a significant workload and capital investment in machining, programming, and tool manufacturing, while also presenting certain management challenges. Summary of the Invention

[0003] The object of the present invention is to provide an engine blade machining clamping device and method to overcome the problem of poor versatility of existing blade machining fixtures.

[0004] A device for processing and clamping engine blades comprises an adapter plate and a mounting support, wherein a blade clamping device is fixed on the adapter plate, and the blade clamping device is used to clamp the blade to be processed, and the adapter plate is arranged on the mounting support, and the adapter plate and the mounting support are locked by a locking screw; a plurality of positioning holes are provided on the adapter plate, and a plurality of spring positioning pins are provided at the bottom of the mounting support, and each spring positioning pin corresponds to a positioning hole, and the blade clamping device positions and clamps the blade body, and the rotation center of the blade clamping device after clamping the blade is the axis of the blade body along the blade height direction.

[0005] Preferably, a rotation axis is provided between the adapter plate and the mounting support.

[0006] Preferably, a rotating shaft sleeve is provided between the mounting support and the rotating shaft, a rotating docking hole is provided on the adapter plate, and one end of the rotating shaft is inserted into the rotating docking hole of the adapter plate.

[0007] Preferably, the blade clamping device includes a clamping seat, a groove is provided on the clamping seat, a clamping part is provided on both sides of the groove, the clamping part and the clamping seat are fixed by fastening bolts, the blade body of the blade to be processed is provided in the groove, and the two sides of the blade body of the blade to be processed are pressed by a clamping part respectively.

[0008] Preferably, a plurality of arc-shaped grooves are provided on the adapter plate, and the locking screws are located in the arc-shaped grooves.

[0009] Preferably, the spring locating pin includes a locating pin sleeve and a locating pin shaft. A through hole is provided on the mounting support. The locating pin sleeve is inserted into the through hole of the mounting support. The locating pin sleeve is fixed to the bottom of the mounting support by a screw. The locating pin shaft is inserted into the locating pin sleeve. A compression spring is provided between the locating pin shaft and the locating pin sleeve.

[0010] Preferably, the adapter plate and the blade clamping device are integrally formed or connected with bolts.

[0011] Preferably, the plurality of positioning holes are on the same circumference of the relative rotation center of the adapter plate and the mounting support.

[0012] An engine blade machining and clamping method based on an engine blade machining and clamping device comprises the following steps:

[0013] According to the type of blade to be processed and the torsion angle of the blade body along the blade height direction, select the corresponding adapter plate and the corresponding positioning hole of the mounting bracket and fasten it with the spring positioning pin; then lock it with the locking screw to complete the processing of the blade.

[0014] Preferably, the common point of the blades to be processed is the same size of the mounting plates; the difference is the different torsion angles.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] The present invention provides an engine blade processing and clamping device, which adopts a blade clamping device to clamp the blade to be processed, and sets the adapter plate on the mounting support, and the adapter plate and the mounting support are locked by a locking screw; a plurality of positioning holes are set on the adapter plate, and a plurality of spring positioning pins are set at the bottom of the mounting support, each spring positioning pin corresponds to a positioning hole, and the blade clamping device positions and clamps the blade body, and the rotation center of the blade clamping device after clamping the blade is the axis of the blade body along the blade height direction, and the adapter plate and the mounting support are rotated, and a spring positioning pin corresponds to a positioning hole, and a positioning hole corresponds to a type of blade serial number, so that blades with different torsion angles can be clamped, and the purpose of processing different blade mounting plates with the same processing program is achieved. The present invention has a simple structure, and the above-mentioned actions can be repeated after processing a blade with a serial number to achieve batch processing; in the process of processing blades with all serial numbers, only the first serial number blade debugging program needs to be debugged, which saves debugging time and eliminates blade tolerance caused by debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the blade processing and clamping device in an embodiment of the present invention.

[0018] Figure 2 It is a top view of the blade processing and clamping device in an embodiment of the present invention.

[0019] In the figure, 1. adapter plate; 2. mounting support; 3. blade clamping device; 4. blade to be processed; 5. locking screw; 6. spring locating pin; 7. rotating shaft; 8. locating hole; 9. clamping seat; 10. clamping part; 11. fastening bolt; 12. locating pin sleeve; 13. locating pin shaft; 14. compression spring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0022] like Figure 1 As shown, the present invention provides an engine blade processing clamping device, including an adapter plate 1 and a mounting support 2, a blade clamping device 3 is fixed on the adapter plate 1, and the blade clamping device 3 is used to clamp the blade 4 to be processed, the adapter plate 1 is set on the mounting support 2, and the adapter plate 1 and the mounting support 2 are locked by a locking screw 5; a plurality of positioning holes 8 are provided on the adapter plate 1, and a plurality of spring positioning pins 6 are provided at the bottom of the mounting support 2, each spring positioning pin 6 corresponds to a positioning hole 8, and the blade clamping device 3 is used to position and clamp the blade body of the blade, and the blade clamping device 3 clamps The rotation center after holding the blade is the axis of the blade body along the blade height direction. The adapter plate 1 and the mounting support 2 are rotated, and a spring locating pin 6 corresponds to a positioning hole 8. A positioning hole corresponds to a type of blade number, so that the blades with different torsion angles can be clamped and the purpose of processing different blade mounting plates with the same processing procedure can be achieved. The present invention has a simple structure. After processing a blade with a serial number, the above-mentioned action can be repeated to perform batch processing. In the process of processing blades of all serial numbers, only the first serial number blade debugging program is required, which saves debugging time and eliminates blade tolerance caused by debugging.

[0023] Specifically, the mounting support 2 of the present invention is used for fixed connection with a processing machine tool, and the adapter plate 1 and the blade clamping device 3 are integrally formed or connected by bolts.

[0024] A rotating shaft 7 is arranged between the adapter plate 1 and the mounting support 2. The rotating shaft 7 is based on the mounting support 2. A rotating shaft sleeve is arranged between the mounting support 2 and the rotating shaft 7. A rotating docking hole is opened on the adapter plate 1. One end of the rotating shaft 7 is inserted into the rotating docking hole of the adapter plate 1. When in use, lubricant can be added between the rotating shaft 7 and the adapter plate 1 and the mounting support 2 to reduce the rotational friction between the adapter plate 1 and the mounting support 2 when replacing the blades.

[0025] like Figure 2 As shown, multiple positioning holes 8 are on the same circumference of the relative rotation center of the adapter plate 1 and the mounting support 2. Taking one of the positioning holes 8 as the reference, the rotation angle between the positioning holes spaced apart from the reference positioning hole is the torsion angle of different blades.

[0026] This application assumes that the blade body has a twist angle along the blade height direction. The common point of different types of blades is that the mounting plate size is the same; the difference is the different twist angles. There are 7 different angles in total, as shown in Table 1, with the No. 4 blade structure as the benchmark.

[0027] Table 1 shows the corresponding numbers of 7 different twist angles based on the No. 4 blade structure

[0028]

[0029] Taking blade No. 4 as the torsion angle reference, the purpose of machining different blade mounting plates with the same machining procedure is achieved by changing the mutual angular relationship between the adapter plate 1 and the mounting support 2.

[0030] Specifically, when processing on a four-coordinate machining center, a CNC machining program is compiled based on the size of part number 4. After the processing is completed, the spring locating pin 6 is manually pulled out, and the adapter plate 1 is rotated to the serial number (i.e., torsion angle) corresponding to another type of blade to be processed. The corresponding locating hole on the adapter plate 1 is aligned with the spring locating pin 6, and the spring locating pin 6 automatically pops out to lock the adapter plate 1, fixing the relative torsion angle position of the adapter plate 1 and the mounting support 2, and then processing of the blade to be processed can begin.

[0031] When processing the blade mounting plate, a blade body positioning solution is adopted. Since the blade body is a curved surface and is easily crushed, a blade clamping device 3 is used to wrap the blade body.

[0032] The blade clamping device 3 specifically includes a clamping seat 9, a clamping portion 10 is provided on each side of the clamping seat, and the clamping portion 10 is fixed to the clamping seat 9 by a fastening bolt 11. A groove is provided on the clamping seat 9, and the blade body of the blade to be processed is provided in the groove. The blade body of the blade to be processed is respectively compressed by a clamping portion 10 on both sides, and the fastening bolts are locked. The two clamping portions 10 and the grooves on the clamping seat 9 form a rectangular clamping structure that wraps the blade body, thereby protecting the blade body and facilitating clamping. A positioning and clamping mechanism is designed and manufactured according to the wrapping shape, and the positioning and clamping mechanism is fixed to the adapter plate. The adapter plate 1 is connected to the mounting support 2. The mounting support 2 is designed to be a structure that can be connected to the turntable of the four-coordinate equipment according to processing needs.

[0033] There are multiple arc grooves on the adapter plate 1, and the locking screws 5 are located in the arc grooves. When the adapter plate 1 and the mounting bracket 2 need to be rotated, the locking screws 5 are loosened and the adapter plate 1 is rotated. The locking screws 5 slide in the arc grooves. When the corresponding spring positioning pins 6 are automatically inserted into the corresponding positioning holes 8, the set position is reached, and then the locking screws 5 are tightened.

[0034] like Figure 2 As shown, the spring locating pin 6 includes a locating pin sleeve 12 and a locating pin shaft 13. A through hole is provided on the mounting support 2. The locating pin sleeve 12 is inserted into the through hole of the mounting support 2. The locating pin sleeve 12 is fixed to the bottom of the mounting support 2 by screws. The locating pin shaft 13 is inserted into the locating pin sleeve 12. A compression spring 14 is provided between the locating pin shaft 13 and the locating pin sleeve 12. The compression spring 14 is used to press the locating pin shaft 13 to ensure that the locating pin shaft 13 of the mounting support 2 is aligned with the locating hole on the adapter plate 1 and can automatically enter to achieve the purpose of locking.

[0035] When machining blades, the fixture is mounted on the four-axis machine. First, the blade number to be machined is determined. The spring locating pin 6 is pulled out. After the adapter plate 1 is rotated to the corresponding angle, the spring locating pin 6 automatically inserts into the corresponding locating hole 8. Finally, the adapter plate 1 and the mounting bracket 2 are fixed with locking screws 5 to prevent wear and damage to the locator during the machining process. After machining a blade with a serial number, the above steps are repeated to complete batch machining. When machining all blade numbers, only the first blade number needs to be debugged, saving debugging time and eliminating blade deviations caused by debugging.

Claims

1. An engine blade processing and clamping device, characterized in that: The invention comprises an adapter plate (1) and a mounting support (2), wherein a blade clamping device (3) is fixed on the adapter plate (1), and the blade clamping device (3) is used to clamp a blade to be processed (4), and the adapter plate (1) is arranged on the mounting support (2), and the adapter plate (1) and the mounting support (2) are locked by a locking screw (5); a plurality of positioning holes (8) are arranged on the adapter plate (1), and a plurality of spring positioning pins (6) are arranged at the bottom of the mounting support (2), and each spring positioning pin (6) corresponds to a positioning hole (8); the blade clamping device (3) is positioned and clamped by the blade body, and the rotation center of the blade clamping device (3) after clamping the blade is the axis of the blade body along the blade height direction; the plurality of positioning holes (8) are on the same circumference of the relative rotation center of the adapter plate (1) and the mounting support (2), and one of the positioning holes (8) is used as a reference, and the rotation angle between the positioning holes arranged at intervals from the reference positioning hole is the torsion angle of different blades.

2. The engine blade processing and clamping device according to claim 1, characterized in that: A rotating shaft (7) is provided between the adapter plate (1) and the mounting support (2).

3. The engine blade processing and clamping device according to claim 1, characterized in that: A rotating shaft sleeve is provided between the mounting support (2) and the rotating shaft (7), a rotating docking hole is provided on the adapter plate (1), and one end of the rotating shaft (7) is inserted into the rotating docking hole of the adapter plate (1).

4. The engine blade processing and clamping device according to claim 1, characterized in that: The blade clamping device (3) includes a clamping seat (9), a groove is provided on the clamping seat (9), a clamping portion (10) is provided on both sides of the groove, the clamping portion (10) and the clamping seat (9) are fixed by fastening bolts (11), the blade body of the blade to be processed is provided in the groove, and the two sides of the blade body of the blade to be processed are respectively pressed by a clamping portion (10).

5. The engine blade processing and clamping device according to claim 1, characterized in that: A plurality of arc-shaped grooves are provided on the adapter plate (1), and the locking screws (5) are located in the arc-shaped grooves.

6. The engine blade processing and clamping device according to claim 1, characterized in that: The spring locating pin (6) includes a locating pin sleeve (12) and a locating pin shaft (13). A through hole is provided on the mounting support (2). The locating pin sleeve (12) is inserted into the through hole of the mounting support (2). The locating pin sleeve (12) is fixed to the bottom of the mounting support (2) by a screw. The locating pin shaft (13) is inserted into the locating pin sleeve (12). A compression spring (14) is provided between the locating pin shaft (13) and the locating pin sleeve (12).

7. The engine blade processing and clamping device according to claim 1, characterized in that: The adapter plate (1) and the blade clamping device (3) are integrally formed or connected by bolts.

8. An engine blade machining and clamping method based on the engine blade machining and clamping device according to claim 1, characterized in that: The following steps are involved: According to the type of blade to be processed and the torsion angle of the blade body along the blade height direction, the corresponding adapter plate (1) and the corresponding positioning hole (8) of the mounting support (2) are selected and fastened with the spring positioning pin (6); then locked by the locking screw (5); and the processing of the blade is completed.

9. The engine blade processing and clamping method according to claim 8, characterized in that: The common point of the blades to be processed is the same size of the mounting plates; the difference is the different torsion angles.

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