A single fixture for milling a blade

Abstract

The application relates to a milling clamp and method for single-installation-plate blades, which comprises a bottom plate, an L-shaped positioning block and a sliding block mounting seat mounted on the top surface of the bottom plate, a clamping sliding block slidingly mounted on the sliding block mounting seat and a first adjusting bolt screwed on the clamping sliding block, the first adjusting bolt being connected with the clamping sliding block, the first adjusting bolt being rotated to drive the clamping sliding block to move along the Y direction of the clamp, an L-shaped rotating block being mounted on the clamping sliding block, a Y-direction pressing block being arranged on the first branch of the L-shaped rotating block, a second adjusting bolt being mounted on the second branch of the L-shaped rotating block, an X-direction pressing block being rotatably mounted on the end of the second adjusting bolt, the second adjusting bolt being rotated to drive the X-direction pressing block to move along the X direction of the clamp, and the pressing surfaces of the X-direction pressing block and the Y-direction pressing block and the first positioning surface and the second positioning surface of the L-shaped positioning block jointly forming a workpiece mounting hole.

Description

Technical Field

[0001] This invention relates to the field of aero-engine blade machining technology, and in particular to a milling fixture and method for a single mounting plate blade. Background Technology

[0002] As a key component of aero-engines, the quality and precision of the blades' manufacturing directly affect the engine's overall performance and operational reliability.

[0003] Combination Figure 1 The diagram shows the structure of a single mounting plate blade. After the blade is cast, the mounting plate needs to be machined. Specifically, the outer circumferential surface and the groove on the bottom surface of the mounting plate need to be milled.

[0004] The single-mount-plate blade has a unique structure, with a journal at the top and a mounting plate at the bottom. During milling, the blade's twisted, curved shape makes direct clamping impossible. If the journal is chosen as the clamping point, the distance between it and the mounting plate is significant due to the blade's instability, and the insufficient rigidity of the blade itself causes the mounting plate to vibrate during milling, thus affecting machining accuracy.

[0005] When milling the mounting plate of a single mounting plate blade, how to clamp it is an urgent problem to be solved. Summary of the Invention

[0006] The main objective of this invention is to provide a milling fixture and method for a single mounting plate blade, in order to solve the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides a milling fixture for a single mounting plate blade, comprising a base plate; an L-shaped positioning block and a slider mounting seat are mounted on the top surface of the base plate; the L-shaped positioning block has a first positioning surface and a second positioning surface that are perpendicular to each other; a clamping slider is slidably mounted on the slider mounting seat and a first adjusting bolt is screwed onto it; the first adjusting bolt is connected to the clamping slider; the clamping slider is driven to move along a direction parallel to the Y direction of the fixture by rotating the first adjusting bolt; an L-shaped rotating block is mounted on the clamping slider; a Y-direction clamping block is provided on the first arm of the L-shaped rotating block; a second adjusting bolt is mounted on the second arm of the L-shaped rotating block; an X-direction clamping block is rotatably mounted on the end of the second adjusting bolt; the X-direction clamping block is driven to move along a direction parallel to the X direction of the fixture by rotating the second adjusting bolt; the clamping surfaces of the X-direction clamping block and the Y-direction clamping block, together with the first positioning surface and the second positioning surface, form a workpiece mounting hole.

[0008] Preferably, a height adjustment pin is installed on the top surface of the base plate, and the height adjustment pin is located in the workpiece mounting hole; the height adjustment pin is threaded with the base plate; the height of the top surface of the height adjustment pin is adjusted by adjusting the screw-in depth of the height adjustment pin.

[0009] Preferably, the second adjusting bolt is mounted on the second arm of the L-shaped rotating block via a T-nut; a sliding groove is provided on the second arm of the L-shaped rotating block, and the T-nut is slidably mounted in the sliding groove; the sliding groove is parallel to the Y direction of the clamp; the second adjusting bolt passes through and is screwed into the thread of the T-nut.

[0010] Preferably, the bottom surface of the clamping slider is slidably engaged with the top surface of the base plate; a first T-slot is provided on the slider mounting seat; the clamping slider is slidably mounted in the first T-slot.

[0011] Preferably, a vertical second T-slot is provided on the clamping slider, and the end of the first adjusting bolt is engaged in the second T-slot.

[0012] Preferably, a mounting portion is integrally formed on the first arm of the L-shaped rotating block; a mounting groove is provided on the clamping slider; the mounting portion of the L-shaped rotating block is inserted into the mounting groove of the clamping slider, and the clamping slider and the mounting portion of the L-shaped rotating block are connected by a first pin to form a rotating pair.

[0013] Preferably, a U-shaped groove is provided on the Y-direction clamping block, and the first arm of the L-shaped rotating block is inserted into the U-shaped groove of the Y-direction clamping block. The two side groove walls of the Y-direction clamping block and the first arm of the L-shaped rotating block are connected by a second pin to form a rotating pair.

[0014] Preferably, the pressing surfaces of the X-axis pressing block and the Y-axis pressing block are provided with a grid-like anti-slip texture.

[0015] On the other hand, the present invention also proposes a milling method for a single mounting plate blade, using the above-mentioned milling fixture, comprising the following steps:

[0016] S1. Cast an alloy block onto the blade to be processed to form an assembly; the alloy block is a prism with a rectangular cross-section, and the blade body to be processed is enclosed within the alloy block; the melting point of the alloy block is lower than the melting point of the blade to be processed.

[0017] S2. Install the milling fixture on the worktable of the CNC milling machine;

[0018] S3. Place the assembly obtained in step S1 into the workpiece mounting hole of the milling fixture, with the mounting plate of the blade to be processed facing upwards; use the first positioning surface and the second positioning surface of the L-shaped positioning block to abut against two adjacent sides of the alloy block respectively.

[0019] S4. By rotating the first adjusting bolt, the clamping slider is driven to move along the negative Y direction parallel to the fixture; by rotating the second adjusting bolt, the X-direction clamping block is driven to move along the negative X direction parallel to the fixture; so that the X-direction clamping block and the Y-direction clamping block are respectively pressed against the other two adjacent sides of the alloy block; the assembly is clamped.

[0020] S5. Perform CNC milling on the mounting plate of the blade;

[0021] S6. Remove the milled assembly from the milling fixture and melt away the alloy block.

[0022] Preferably, in step S3, when the assembly is placed in the workpiece mounting hole of the milling fixture, the lower end face of the alloy block on the assembly abuts against the top surface of the height adjustment pin; by adjusting the screw depth of the height adjustment pin into the base plate, the height of the top surface of the height adjustment pin is adjusted, thereby adjusting the height of the assembly.

[0023] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0024] (1) By using the milling fixture provided by the present invention, when performing CNC milling on a single mounting plate blade, an alloy block is cast on the blade to be processed to form an assembly. The resulting assembly is then clamped in the workpiece mounting hole of the milling fixture. The assembly can be clamped under the combined action of the X-axis clamping block 5, the Y-axis clamping block 9, and the first and second positioning surfaces of the L-shaped positioning block, so as to facilitate CNC milling of the blade mounting plate.

[0025] (2) By utilizing the processing method provided by the present invention, since an alloy block is cast on the blade body to be processed and the milling jig is clamped on the alloy block, the rigidity can be improved, vibration during milling can be avoided, and the processing accuracy can be improved.

[0026] (3) By adopting the milling fixture and milling method provided by the present invention, the efficiency and quality of aircraft blade mounting plate processing are improved.

[0027] (4) In this invention, rotating the first adjusting bolt drives the clamping slider to move along the Y direction parallel to the clamp, thereby driving the Y-axis clamping block to move; rotating the second adjusting bolt drives the X-axis clamping block to move along the X direction parallel to the clamp. Since the positions of the Y-axis clamping block and the X-axis clamping block can be adjusted, it can be used to clamp assemblies of different sizes. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a single mounting plate blade.

[0030] Figure 2 This is a three-dimensional structural diagram of the milling fixture provided by the present invention;

[0031] Figure 3 This is a front view of the milling fixture provided by the present invention;

[0032] Figure 4 This is a top view of the milling fixture provided by the present invention;

[0033] Figure 5 for Figure 3 Sectional view of AA;

[0034] Figure 6 This is a top view of the L-shaped positioning block in this invention;

[0035] Figure 7 This is a schematic diagram of the L-shaped rotating block in this invention;

[0036] Figure 8 This is a structural diagram of the assembly formed by the L-shaped rotating block, the T-shaped nut, the second adjusting bolt, and the X-direction clamping block in this invention.

[0037] Figure 9 A schematic diagram of an assembly formed by casting alloy blocks onto a blade to be processed;

[0038] Figure 10 This is a schematic diagram of clamping an assembly using the milling fixture provided by the present invention.

[0039] Explanation of reference numerals: 1. Base plate; 2. L-shaped positioning block; 2a. First positioning surface; 2b. Second positioning surface; 3. Positioning pin; 4. Height adjustment pin; 5. X-axis clamping block; 6. T-nut; 7. Second adjusting bolt; 8. L-shaped rotating block; 9. Y-axis clamping block; 10. Clamping slider; 10a. Second T-slot; 10b. Mounting slot; 11. First pin; 12. First adjusting bolt; 13. Slider mounting seat; 13a. First T-slot; 14. Second pin; 15. Alloy block; 100. Workpiece mounting hole. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0043] Combination Figure 1 The diagram shows the structure of a single mounting plate blade. After the blade is cast, the mounting plate needs to be machined. Specifically, the outer circumferential surface and the groove A on the bottom surface of the mounting plate need to be milled.

[0044] Combination Figures 2 to 8 The image shows a specific embodiment of a milling fixture for a single mounting plate blade provided by the present invention. The milling fixture includes a base plate 1. In this embodiment, the longitudinal direction of the base plate 1 is defined as the Y-direction, with a positive Y-direction to the right. The width direction of the base plate 1 is defined as the X-direction, with a positive X-direction to the front. The vertically upward direction is the positive Z-direction. (See coordinate system orientation). Figure 1 As shown.

[0045] Combination Figure 2 , Figure 4 and Figure 10As shown, an L-shaped positioning block 2 and a slider mounting base 13 are installed on the top surface of the base plate 1. Specifically, the L-shaped positioning block 2 is fixedly installed on the base plate 1 by two positioning pins 3 and screws, and the slider mounting base 13 is fastened to the top surface of the base plate 1 by two screws. The L-shaped positioning block 2 has a first positioning surface 2a and a second positioning surface 2b that are perpendicular to each other; a clamping slider 10 is slidably installed on the slider mounting base 13, and a first adjusting bolt 12 is screwed onto it; the axis of the first adjusting bolt 12 is parallel to the Y direction of the clamp. The left end of the first adjusting bolt 12 is connected to the clamping slider 10; rotating the first adjusting bolt 12 drives the clamping slider 10 to move along the Y direction parallel to the fixture; an L-shaped rotating block 8 is installed on the clamping slider 10; a Y-direction clamping block 9 is provided on the first arm of the L-shaped rotating block 8; a second adjusting bolt 7 is installed on the second arm of the L-shaped rotating block 8; an X-direction clamping block 5 is rotatably installed on the end of the second adjusting bolt 7; rotating the second adjusting bolt 7 drives the X-direction clamping block 5 to move along the X direction parallel to the fixture. The first positioning surface 2a is perpendicular to the Y direction of the fixture, and the second positioning surface 2b is perpendicular to the X direction of the fixture. The clamping surfaces of the X-direction clamping block 5 and the Y-direction clamping block 9, together with the first positioning surface 2a and the second positioning surface 2b, form the workpiece mounting hole 100.

[0046] Combination Figure 4 As shown, a height adjustment pin 4 is installed on the top surface of the base plate 1, and the height adjustment pin 4 is located in the workpiece mounting hole 100; the height adjustment pin 4 is threadedly engaged with the base plate 1; the height of the top surface of the height adjustment pin 4 can be adjusted by adjusting the screw-in depth of the height adjustment pin 4.

[0047] Combination Figure 7 , Figure 8 As shown, the second adjusting bolt 7 is mounted on the second arm of the L-shaped rotating block 8 via a T-nut 6; a sliding groove 8a is provided on the second arm of the L-shaped rotating block 8, and the T-nut 6 is slidably mounted in the sliding groove 8a; the sliding groove 8a is parallel to the Y direction of the clamp; the second adjusting bolt 7 passes through and is screwed into the thread of the T-nut 6. The T-nut 6 can slide in the sliding groove 8a, thereby adjusting the position of the X-direction clamping block 5 in the Y direction.

[0048] Combination Figure 2 and Figure 5 As shown, the bottom surface of the clamping slider 10 is slidably engaged with the top surface of the base plate 1; a first T-slot 13a is provided on the slider mounting base 13; the clamping slider 10 is slidably mounted in the first T-slot 13a. Specifically, in conjunction with Figure 5 As shown, the clamping slider 10 has an inverted T-shaped cross section in AA.

[0049] Combination Figure 2 and Figure 4 As shown, a vertical second T-slot 10a is provided on the clamping slider 10, and the end of the first adjusting bolt 12 is engaged in the second T-slot 10a. The first adjusting bolt 12 can rotate about its own axis relative to the clamping slider 10.

[0050] Combination Figure 2 , Figure 7 and Figure 8 As shown, an installation part 8b is integrally formed on the first arm of the L-shaped rotating block 8; an installation groove 10b is provided on the clamping slider 10; the installation part 8b of the L-shaped rotating block 8 is inserted into the installation groove 10b of the clamping slider 10, and the clamping slider 10 and the installation part 8b of the L-shaped rotating block 8 are connected by a first pin 11 to form a rotating pair, so that the entire L-shaped rotating block 8 can rotate around the first pin 11 for clamping operation.

[0051] Combination Figure 9 , Figure 10 As shown, this embodiment also provides a milling method for a single mounting plate blade, using the above-mentioned milling fixture, including the following steps:

[0052] S1. Cast alloy block 15 onto the blade to be processed to form assembly 200; the alloy block 200 is a prism with a rectangular cross-section, and the blade body of the blade to be processed is wrapped inside the alloy block 200; the melting point of the alloy block 15 is lower than the melting point of the blade to be processed.

[0053] S2. Install the milling fixture on the worktable of the CNC milling machine;

[0054] S3. Place the assembly 200 obtained in step S1 into the workpiece mounting hole 100 of the milling fixture, with the mounting plate of the blade to be processed facing upwards; use the first positioning surface 2a and the second positioning surface 2b of the L-shaped positioning block 2 to abut against two adjacent sides of the alloy block 15 respectively.

[0055] S4. By rotating the first adjusting bolt 12, the clamping slider 10 is driven to move along the negative Y direction parallel to the clamp; by rotating the second adjusting bolt 7, the X-direction clamping block 5 is driven to move along the negative X direction parallel to the clamp; so that the X-direction clamping block 5 and the Y-direction clamping block 9 are respectively pressed against the other two adjacent sides of the alloy block 15; the assembly 200 is clamped.

[0056] S5. Perform CNC milling on the mounting plate of the blade;

[0057] S6. Remove the milled assembly 200 from the milling fixture and melt away the alloy block 15.

[0058] In step S3, when the assembly 200 is placed in the workpiece mounting hole 100 of the milling fixture, the lower end face of the alloy block 15 on the assembly 200 abuts against the top surface of the height adjustment pin 4; by adjusting the screw depth of the height adjustment pin 4 into the base plate 1, the height of the top surface of the height adjustment pin 4 is adjusted, thereby adjusting the height of the assembly 200.

[0059] In step S4, when clamping the assembly (200), the X-direction clamping block 5 is adjusted to a suitable position in the Y direction by sliding the T-shaped nut 6 in the Y direction of the clamp, and then the X-direction clamping block 5 is driven to move along the negative X direction of the clamp to clamp the alloy block 15 by rotating the second adjusting bolt 7.

[0060] In this embodiment, a clearance groove 2c is provided at the intersection of the first positioning surface 2a and the second positioning surface 2b. The purpose of providing the clearance groove 2c is to avoid interference with the edges of the alloy block 15 on the clamped assembly 200.

[0061] Combination Figure 2 As shown, a U-shaped groove is provided on the Y-axis clamping block 9, and the first arm of the L-shaped rotating block 8 is inserted into the U-shaped groove of the Y-axis clamping block 9. The two side groove walls of the Y-axis clamping block 9 and the first arm of the L-shaped rotating block 8 are connected to form a rotating pair by a second pin 14. The Y-axis clamping block 9 can rotate around the second pin 14 to ensure that the clamping surface of the Y-axis clamping block 9 fits better against the alloy block 15 of the clamped assembly 200.

[0062] In this embodiment, the pressing surfaces of the X-axis pressing block 5 and the Y-axis pressing block 9 are provided with a grid-like anti-slip texture. During clamping, this prevents relative sliding between the X-axis pressing block 5 and the Y-axis pressing block 9 and the alloy block 15, ensuring the clamping effect.

[0063] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A milling fixture for a single mounting plate blade, characterized in that, Including the base plate (1); An L-shaped positioning block (2) and a slider mounting seat (13) are installed on the top surface of the base plate (1). The L-shaped positioning block (2) has a first positioning surface (2a) and a second positioning surface (2b) that are perpendicular to each other. A clamping slider (10) is slidably mounted on the slider mounting base (13), and a first adjusting bolt (12) is screwed onto it; the first adjusting bolt (12) is connected to the clamping slider (10); by rotating the first adjusting bolt (12), the clamping slider (10) is driven to move along the Y direction parallel to the clamp; An L-shaped rotating block (8) is installed on the clamping slider (10); A Y-axis clamping block (9) is provided on the first arm of the L-shaped rotating block (8). A second adjusting bolt (7) is installed on the second arm of the L-shaped rotating block (8); an X-direction clamping block (5) is rotatably installed at the end of the second adjusting bolt (7); the X-direction clamping block (5) is driven to move along the X direction parallel to the clamp by rotating the second adjusting bolt (7); The pressing surfaces of the X-axis pressing block (5) and the Y-axis pressing block (9), together with the first positioning surface (2a) and the second positioning surface (2b), form a workpiece mounting hole (100). A height adjustment pin (4) is installed on the top surface of the base plate (1), and the height adjustment pin (4) is located inside the workpiece mounting hole (100); The height adjustment pin (4) is threaded into the base plate (1); the height of the top surface of the height adjustment pin (4) can be adjusted by adjusting the screw depth of the height adjustment pin (4); The second adjusting bolt (7) is mounted on the second arm of the L-shaped rotating block (8) by means of a T-nut (6); A groove (8a) is provided on the second arm of the L-shaped rotating block (8), and the T-shaped nut (6) is slidably installed in the groove (8a); the groove (8a) is parallel to the Y direction of the clamp; The second adjusting bolt (7) passes through and engages in the threaded hole of the T-nut (6); The bottom surface of the clamping slider (10) is slidably engaged with the top surface of the base plate (1); a first T-slot (13a) is provided on the slider mounting seat (13); the clamping slider (10) is slidably installed in the first T-slot (13a); An mounting portion (8b) is integrally formed on the first arm of the L-shaped rotating block (8). An installation groove (10b) is provided on the clamping slider (10); The mounting portion (8b) of the L-shaped rotating block (8) is inserted into the mounting groove (10b) of the clamping slider (10), and the clamping slider (10) and the mounting portion (8b) of the L-shaped rotating block (8) are connected by a first pin (11) to form a rotating pair.

2. The milling fixture as described in claim 1, characterized in that, A vertical second T-slot (10a) is provided on the clamping slider (10), and the end of the first adjusting bolt (12) is stuck in the second T-slot (10a).

3. The milling fixture as described in claim 1, characterized in that, A U-shaped groove is provided on the Y-direction pressing block (9), and the first arm of the L-shaped rotating block (8) is inserted into the U-shaped groove of the Y-direction pressing block (9). The two side groove walls of the Y-direction pressing block (9) and the first arm of the L-shaped rotating block (8) are connected by the second pin (14) to form a rotating pair.

4. The milling fixture as described in claim 1, characterized in that, The pressing surfaces of the X-direction pressing block (5) and the Y-direction pressing block (9) are provided with grid-like anti-slip textures.

5. A milling method for a single mounting plate blade, characterized in that, The milling fixture according to any one of claims 1 to 4 comprises the following steps: S1. Cast an alloy block (15) onto the blade to be processed to form an assembly (200); the alloy block (15) is a prism with a rectangular cross-section, and the blade body of the blade to be processed is enclosed in the alloy block (15); the melting point of the alloy block (15) is lower than the melting point of the blade to be processed. S2. Install the milling fixture on the worktable of the CNC milling machine; S3. Place the assembly (200) obtained in step S1 into the workpiece mounting hole (100) of the milling fixture, with the mounting plate of the blade to be processed facing upwards; use the first positioning surface (2a) and the second positioning surface (2b) of the L-shaped positioning block (2) to abut against two adjacent sides of the alloy block (15); S4. By rotating the first adjusting bolt (12), the clamping slider (10) is driven to move along the negative Y direction parallel to the clamp; by rotating the second adjusting bolt (7), the X-direction clamping block (5) is driven to move along the negative X direction parallel to the clamp; so that the X-direction clamping block (5) and the Y-direction clamping block (9) are respectively pressed against the other two adjacent sides of the alloy block (15); the assembly (200) is clamped. S5. Perform CNC milling on the mounting plate of the blade; S6. Remove the milled assembly (200) from the milling fixture and melt the alloy block (15).

6. The milling method for a single mounting plate blade as described in claim 5, characterized in that, In step S3, when the assembly (200) is placed in the workpiece mounting hole (100) of the milling fixture, the lower end face of the alloy block (15) on the assembly (200) abuts against the top surface of the height adjustment pin (4); by adjusting the screw depth of the height adjustment pin (4) into the base plate (1), the height of the top surface of the height adjustment pin (4) is adjusted, thereby adjusting the height of the assembly (200).

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