A boring and milling tooling for the journal of a split diffusion bonding structure blade

Abstract

A facing diffusion welding structure blade journal boring and milling tooling, belonging to the technical field of aero-engine blade machining, includes a base for supporting the upper structure, and a first pressing plate positioning assembly and a second pressing plate positioning assembly installed at both ends of the upper surface of the base. At the upper surface of the base at the front ends of the first pressing plate positioning assembly and the second pressing plate positioning assembly, a second positioning block and a third positioning block for determining the axial direction of the blade are respectively installed, so as to realize the conformal positioning in the axial direction of the blade. By using the journal boring and milling tooling, boring and milling are combined on the same device, which can meet the requirement of no interference during the two machining processes of boring and milling, improve the clamping stability of the blade, and the consistency of the position tolerance of the journal is better; at the same time, the blade does not vibrate during the machining process, avoiding the problem of unstable machining dimensions caused by the vibration of the blade, thereby improving the machining quality of the blade.

Description

Technical Field

[0001] The present invention belongs to the technical field of aero-engine blade processing, and particularly relates to a boring and milling tooling for the journal of a split diffusion welding structure blade. Background Art

[0002] At present, most of the aero-engine inlet casings adopt the design scheme of inlet struts and adjustable blades with a titanium alloy split diffusion welding structure. While bringing weight reduction and high reliability to the engine, it also brings many challenges to the processing and manufacturing of the blades.

[0003] For the blades with a split diffusion welding structure, a process manufacturing scheme of single-piece machining of the inner cavity - diffusion welding connection - component machining of the outer contour is adopted. Therefore, a process scheme of first machining the outer contour of the blade profile and then machining parts such as the journal and the blade shoulder is generally adopted. For the journal-type split diffusion welding blade, after machining the blade profile, a square positioning is required to machine the journal. The journal tolerance is generally extremely precise, and the minimum tolerance is only 0.011 mm. The schematic diagrams before and after blade machining are shown in Figure 5 and Figure 6 As shown, when machining this blade, two square blocks on both sides are used for positioning. The blade is relatively long. In order not to cause interference during machining the journal, the clamping parts on both sides are small, and the blade is prone to jitter during machining, making it impossible to ensure the diameter tolerance of the journal machining and the position degree of the journal. Summary of the Invention

[0004] The purpose of the present invention is to provide a boring and milling tooling for the journal of a split diffusion welding structure blade. By using the boring and milling tooling, boring and milling are combined on the same device, which can meet the requirement of no interference during the two machining processes of boring and milling, improve the clamping stability of the blade, and the consistency of the journal position tolerance is better; at the same time, the blade does not vibrate during the machining process, avoiding the problem of unstable machining dimensions caused by the vibration of the blade, thereby improving the machining quality of the blade.

[0005] A boring and milling tooling for the journal of a split diffusion welding structure blade includes a base for supporting the upper structure, and a first pressing plate positioning component and a second pressing plate positioning component installed at both ends of the upper surface of the base. A second positioning block and a third positioning block for determining the axial direction of the blade are respectively installed on the upper surface of the base at the front ends of the first pressing plate positioning component and the second pressing plate positioning component, so as to realize the conformal positioning of the axial direction of the blade.

[0006] The first pressing plate positioning component includes a first upright seat. A first positioning block, a first pressing plate and a first adjusting support are respectively installed on the front end face of the first upright seat. A second pressing plate is arranged on the upper surface of the first upright seat, and a third pressing plate is arranged on the surface of the first upright seat facing the second pressing plate positioning component.

[0007] The first upright seat is installed on the base through a cylindrical pin and a socket head cap screw; the first positioning block is installed on the first upright seat through a socket head cap screw and a cylindrical pin; the second pressing plate and the third pressing plate are both installed on the first upright seat through screws and clamping screws.

[0008] On the front end face of the first upright seat, a first adjusting support and a first equal-length double-headed bolt are screwed. The first adjusting support and the first equal-length double-headed bolt are respectively fixedly installed on the first upright seat through nuts. A first pressing plate is installed on the first equal-length double-headed bolt, and a shoulder nut is installed at the front end of the first equal-length double-headed bolt.

[0009] The second pressing plate positioning assembly includes a second upright seat. A fourth pressing plate is installed on the top of the second upright seat. A second adjusting support and a fifth pressing plate are respectively installed at the front end of the second upright seat. A groove is provided on the lower surface of the second upright seat, and a limiting block is installed in the groove.

[0010] The second upright seat is installed on the base through a socket head cap screw; the fourth pressing plate is installed on the top of the second upright seat through screws and clamping screws; the limiting block is installed on the base through screws.

[0011] On the front end face of the second upright seat, a second adjusting support and a second equal-length double-headed bolt are screwed. The second adjusting support and the second equal-length double-headed bolt are respectively fixedly installed on the second upright seat through nuts. A fifth pressing plate is installed on the second equal-length double-headed bolt, and a shoulder nut is installed at the front end of the second equal-length double-headed bolt.

[0012] The first pressing plate and the fifth pressing plate have the same structure, and long holes for adjusting the position of the pressing plate are provided on both the first pressing plate and the fifth pressing plate.

[0013] The technical effects of the present invention are as follows:

[0014] For the facing diffusion welding structure blade journal boring and milling tooling of the present invention, firstly, a square reference is used for positioning, which improves the positioning stability of the blade; at the same time, the square reference positioning part of the small journal is designed as a floating mechanism to ensure the coaxiality of the cylindrical machining of the large and small ends and realize flexible machining; secondly, two V-shaped blocks are used to determine the axial direction of the blade to realize the conforming positioning in the axial direction, ensure the positional tolerance relationship between the journal machining and the blade profile, and at the same time ensure that the blade body does not vibrate during machining, guarantee the stable machining accuracy, and improve the position consistency between the journal and the blade body; thirdly, the tooling bottom plate is designed according to the actual machining process to ensure no interference during the machining process.

[0015] The facing diffusion welding structure blade journal boring and milling tooling of the present invention can be popularized and applied to the machining of other blades with similar structures; after production and machining with this tooling, the design and manufacturing cycle can be saved by more than two months, and the rework rate of part machining can be reduced by 40%; the indirect economic effect of single-engine machining can reach 30,000 yuan. Description of the Drawings

[0016] Figure 1 Three-dimensional schematic diagram of the boring and milling tooling for the blade journal of the split diffusion welding structure of the present invention;

[0017] Figure 2 Schematic diagram of the clamping parts of the boring and milling tooling for the blade journal of the split diffusion welding structure of the present invention;

[0018] Figure 3 Front view of the boring and milling tooling for the blade journal of the split diffusion welding structure of the present invention;

[0019] Figure 4 Top view of the boring and milling tooling for the blade journal of the split diffusion welding structure of the present invention;

[0020] Figure 5 Schematic diagram before blade processing of the present invention;

[0021] Figure 6 Schematic diagram after blade processing of the present invention;

[0022] 1 - Base, 2 - First vertical seat, 3 - First positioning block, 4 - First pressing plate, 5 - Second pressing plate, 601 - Second positioning block, 602 - Third positioning block, 7 - Second vertical seat, 8 - Third pressing plate, 9 - Limit block, 10 - Shoulder hexagon nut, 11 - Cylindrical pin, 12 - Hexagon socket head cap screw, 13 - Hexagon socket head cap screw, 14 - Hexagon head clamping screw, 15 - Cylindrical pin, 16 - Hexagon socket head cap screw, 17 - First adjusting support, 18 - Hexagon head screw, 19 - I - type hexagon nut, 20 - Second adjusting support, 21 - First equal - length double - end bolt, 22 - Fourth pressing plate, 23 - Fifth pressing plate, 24 - Second equal - length double - end bolt, 25 - Long slot. Detailed implementation method

[0023] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0024] As Figures 1 to 4As shown in the figure, a boring and milling tooling for the journal of a split diffusion welding structure blade includes a base 1 for supporting the upper structure. In order to minimize the weight of the non-contact parts and control the size and weight of the square box, the base 1 provided in this embodiment is in a "convex" shape, and there are two hollowed-out parts machined on the base 1. Lifting rings for hoisting are installed at the four corners of the base 1; a first pressing plate positioning component and a second pressing plate positioning component are installed at both ends of the upper surface of the base 1. In this embodiment, the first pressing plate positioning component includes a first upright seat 2, and the first upright seat 2 is installed on the base 1 through a cylindrical pin 15 and an inner hexagon socket head cap screw 16. A first positioning block 3, a first pressing plate 4 and a first adjusting support 17 are respectively installed on the front end face of the first upright seat 2. The first positioning block 3 is installed on the first upright seat 2 through an inner hexagon socket head cap screw 16 and a cylindrical pin 15. A second pressing plate 5 is arranged on the upper surface of the first upright seat 2, and a third pressing plate 8 is arranged on the surface of the first upright seat 2 facing the second pressing plate positioning component. Both the second pressing plate 5 and the third pressing plate 8 are installed on the first upright seat 2 through a hexagon head screw 18 and a hexagon head pressing screw 14; a first adjusting support 17 and a first equal-length double-headed bolt 21 are screwed on the front end face of the first upright seat 2. The first adjusting support 17 is arranged higher than the first equal-length double-headed bolt 21, and the first adjusting support 17 is closer to the symmetry center of the bottom plate than the first equal-length double-headed bolt 21. The first adjusting support 17 and the first equal-length double-headed bolt 21 are respectively fixedly installed on the first upright seat 2 through an I-shaped hexagon nut 19. The first equal-length double-headed bolt 21 is provided with the first pressing plate 4, and a shoulder hexagon nut 10 is installed at the front end of the first equal-length double-headed bolt 21; in this embodiment, the second pressing plate positioning component includes a second upright seat 7. A long groove 25 is provided in the bottom connecting part of the second upright seat 7, and a groove is provided on the lower surface of the second upright seat 7. A limit block 9 is slidably installed in the groove, and the limit block 9 is installed on the base 1 through a screw. The inner hexagon socket head cap screw 13 is passed through the long groove 25 to slidably install the second upright seat 7 on the base 1 to ensure the coaxiality of the machining of the large and small end cylinders of the blade and realize flexible machining. A fourth pressing plate 22 is installed on the top of the second upright seat 7, and the fourth pressing plate 22 is installed on the top of the second upright seat 7 through a hexagon head screw 18 and a hexagon head pressing screw 14. A second adjusting support 20 and a fifth pressing plate 23 are respectively installed at the front end of the second upright seat 7; a second adjusting support 20 and a second equal-length double-headed bolt 24 are screwed on the front end face of the second upright seat 7. The second adjusting support 20 is arranged higher than the second equal-length double-headed bolt 24, and the second adjusting support 20 is closer to the symmetry center of the bottom plate than the second equal-length double-headed bolt 24. The second adjusting support 20 and the second equal-length double-headed bolt 24 are respectively fixedly installed on the second upright seat 7 through an I-shaped hexagon nut 19. The second equal-length double-headed bolt 24 is provided with the fifth pressing plate 23, and a shoulder hexagon nut 10 is installed at the front end of the second equal-length double-headed bolt 24;At the upper surface of the base 1 at the front ends of the first pressing plate positioning assembly and the second pressing plate positioning assembly, a second positioning block 601 and a third positioning block 602 for determining the axial direction of the blade are respectively installed. The second positioning block 601 and the third positioning block 602 are fixed to the base 1 through a cylindrical pin 11 and an inner hexagon socket head cap screw 12, realizing the conformal positioning of the axial direction of the blade. In this embodiment, the second positioning block 601 and the third positioning block 602 are V-shaped blocks.

[0025] The first pressing plate 4 and the fifth pressing plate 23 have the same structure, and long holes for adjusting the position of the pressing plate are provided on both the first pressing plate 4 and the fifth pressing plate 23. The rear ends of the first pressing plate 4 and the fifth pressing plate 23 are machined with chutes, and the front ends of the first adjusting support 17 and the second adjusting support 20 are respectively matched with the chutes at the rear ends of the first pressing plate 4 and the fifth pressing plate 23.

[0026] A method for using a boring and milling tool for the journal of a split diffusion-welded structure blade includes the following steps:

[0027] Place the part on the second positioning block 601 and the third positioning block 602. Rotate the hexagon head screw 18 and the hexagon head compression screw 14 to make the second pressing plate 5 and the fourth pressing plate 22 cooperate with the second positioning block 601 and the third positioning block 602, so that the blade profile part is positioned through the V-shaped grooves of the second positioning block 601 and the third positioning block 602. Rotate the shoulder hexagon nut 10 to drive the first pressing plate 4 and the fifth pressing plate 23 to press the square block in the large cylinder direction of the blade, and the square block is positioned on the first positioning block 3. Then rotate the hexagon head compression screw 14 and the hexagon head screw 18 to drive the third pressing plate 8 to press the axial compression block of the blade, and the square block is positioned on the first positioning block 3. The part is installed on the tool. At the same time, the second pressing plate positioning assembly at the small end can realize floating positioning along with the positioning block 9.

Claims

1. A boring and milling tooling for the journal of a split diffusion welding structure blade, characterized in that, it includes a base for supporting the upper structure, and a first pressing plate positioning component and a second pressing plate positioning component installed at both ends of the upper surface of the base. At the upper surface of the base at the front ends of the first pressing plate positioning component and the second pressing plate positioning component, a second positioning block and a third positioning block for determining the axial direction of the blade are respectively installed to realize the conformal positioning in the axial direction of the blade; The first pressing plate positioning component includes a first upright seat. A first positioning block, a first pressing plate and a first adjusting support are respectively installed on the front end face of the first upright seat. A second pressing plate is arranged on the upper surface of the first upright seat, and a third pressing plate is arranged on the surface of the first upright seat facing the second pressing plate positioning component; The second pressing plate positioning component includes a second upright seat. A fourth pressing plate is installed on the top of the second upright seat. A second adjusting support and a fifth pressing plate are respectively installed at the front end of the second upright seat. A groove is opened on the lower surface of the second upright seat, and a limiting block is installed in the groove; The first pressing plate and the fifth pressing plate have the same structure, and long holes for adjusting the position of the pressing plate are opened on both the first pressing plate and the fifth pressing plate.

2. A boring and milling tooling for the journal of a split diffusion welding structure blade according to claim 1, characterized in that: The first upright seat is installed on the base through a cylindrical pin and a socket head cap screw; the first positioning block is installed on the first upright seat through a socket head cap screw and a cylindrical pin; the second pressing plate and the third pressing plate are both installed on the first upright seat through screws and clamping screws.

3. A boring and milling tooling for the journal of a split diffusion welding structure blade according to claim 1, characterized in that: A first adjusting support and a first equal-length double-headed bolt are screwed on the front end face of the first upright seat. The first adjusting support and the first equal-length double-headed bolt are respectively fixedly installed on the first upright seat through nuts. A first pressing plate is installed on the first equal-length double-headed bolt, and a shoulder nut is installed at the front end of the first equal-length double-headed bolt.

4. A boring and milling tooling for the journal of a split diffusion welding structure blade according to claim 1, characterized in that: The second upright seat is installed on the base through a socket head cap screw; the fourth pressing plate is installed on the top of the second upright seat through screws and clamping screws; the limiting block is installed on the base through a screw.

5. A boring and milling tooling for the journal of a split diffusion welding structure blade according to claim 1, characterized in that: A second adjusting support and a second equal-length double-headed bolt are screwed on the front end face of the second upright seat. The second adjusting support and the second equal-length double-headed bolt are respectively fixedly installed on the second upright seat through nuts. A fifth pressing plate is installed on the second equal-length double-headed bolt, and a shoulder nut is installed at the front end of the second equal-length double-headed bolt.

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