Rapid alignment device and method for blade array grinding and polishing clamp

Abstract

The invention relates to the technical field of blade array grinding and polishing, in particular to a rapid alignment device and method for a blade array grinding and polishing clamp. The rapid alignment device comprises a square frame body, the upper half part of the square frame body is an upper-layer frame body, and the lower half part of the square frame body is a lower-layer frame body; a plurality of adjusting screws are respectively screwed on each side wall of the upper-layer frame body and the lower-layer frame body; the upper-layer frame body is used for accommodating a flange plate of the clamping seat, and the inner side end of an adjusting screw on the upper-layer frame body can abut against the side face of the flange plate; the lower-layer frame body is used for accommodating the adapter plate on the 3R positioning block, and the inner side end of the adjusting screw on the lower-layer frame body can abut against the side face of the adapter plate. During alignment, the positions of the flange plate relative to the adapter plate in the X-axis direction and the Y-axis direction are adjusted by coordinating the adjusting screws on the upper-layer frame body and the lower-layer frame body; and the rotating angle direction of the flange plate relative to the Z axis is adjusted by coordinating the adjusting screws on the upper-layer frame body and the lower-layer frame body.

Description

Technical Field

[0001] The invention relates to the technical field of blade array grinding and polishing, and in particular to a rapid alignment device and method for a blade array grinding and polishing fixture. Background Art

[0002] With the continuous upgrading and replacement of aircraft engines and the increase in demand, the production accuracy and efficiency of their parts are constantly improving. Aircraft engine blades are one of the most critical parts in the engine. However, the production accuracy and efficiency of blades depend on the blade processing technology and processing methods. In recent years, blade body surface processing has become a bottleneck process for major engine manufacturers. Among them, CNC array grinding + CNC array polishing has become a process approach for blade body surface processing. It has also become a processing technology favored by many aircraft engine manufacturers in the field of processing efficiency and automated processing in recent years. The array processing technology has increased production efficiency geometrically and solved the production and delivery problems of many manufacturers. The advantages of array processing are very prominent, but it also exposes many problems. Array processing has extremely stringent requirements on the manufacturing accuracy and assembly adjustment tolerance of the fixture. Under the current conditions of mature CNC technology, manufacturing accuracy can be solved, but assembly adjustment has become a constraint on the accuracy, efficiency and quality of array processing.

[0003] Combination Figure 1 , Figure 2 As shown, it is a structural schematic diagram of a blade array grinding and polishing fixture commonly used at present, which includes a clamping seat 1 and a 3R positioning block 2, and a flange plate 1a is integrally formed at the bottom of the clamping seat 1. The 3R positioning block 2 is installed on a five-axis CNC machine tool, and an adapter plate 3 is fixedly connected to the 3R positioning block 2. Countersunk holes are provided at the four corners of the flange plate 1a, and the flange plate 1a is connected to the adapter plate 3 through screws 4 in the countersunk holes. A gap T needs to be set between the screw 4 and the countersunk hole of the flange plate 1a. So that when the clamping seat 1 is assembled with blades of different specifications, the position of the clamping seat 1 can be fine-tuned by using the gap T to ensure the position of the assembled blade relative to the adapter plate 3, and then ensure the position of the assembled blade relative to the 3R positioning block 2. Specifically, the position of the entire clamping seat 1 relative to the adapter plate 3 in the X and Y directions is fine-tuned by using the gap T to ensure that the axis of the clamped blade coincides with the axis of the 3R positioning block 2. At the same time, the gap T can also be used to adjust the entire clamping seat 1 to rotate slightly around the Z axis to meet the angular relationship between the clamped blade and the 3R positioning block 2. Figure 3As shown, the current operation steps of fine-tuning the clamping seat 1 using the gap T include: ① First, install the clamping seat 1 on the adapter plate 3 through the screw 4, pre-tighten the screw 4, but do not tighten it; ② Install the blade core rod standard part 5 on the clamping seat 1; ③ Use a dial indicator to mark the outer cylindrical surface and the tenon edge plate plane of the blade core rod standard part 5, and use a manual handheld hammer to knock the flange plate 1a to fine-tune the position of the clamping seat 1. When the dial indicator is qualified, tighten the screw 4 into place.

[0004] However, the following problems exist when fine-tuning the clamping seat 1 by tapping the flange plate 1a: (1) The impact force generated by the tapping is likely to affect the five-axis CNC machine tool. (2) Under the influence of the tapping force, the connection between the 3R positioning block and the adapter plate is likely to loosen, affecting the accuracy of blade grinding and polishing. (3) The tapping force is difficult to control, and the adjustment is based on the operator's experience, which results in low adjustment efficiency and large adjustment errors. Summary of the invention

[0005] The main purpose of the present invention is to provide a rapid alignment device and method for a blade array grinding and polishing fixture, aiming to solve the above-mentioned technical problems.

[0006] To achieve the above-mentioned objectives, on the one hand, the present invention proposes a rapid alignment device for a blade array grinding and polishing fixture, comprising a square frame, the upper half of the square frame being an upper frame, and the lower half being a lower frame; a plurality of adjustment screws are screwed on each side wall of the upper frame and the lower frame respectively; the upper frame is used to accommodate a flange plate of a clamping seat, and the inner end of the adjustment screw on the upper frame can abut against the side of the flange plate; the lower frame is used to accommodate an adapter plate on a 3R positioning block, and the inner end of the adjustment screw on the lower frame can abut against the side of the adapter plate.

[0007] Preferably, three adjusting screws are screwed on each side wall of the upper frame and the lower frame respectively.

[0008] On the other hand, the present invention also provides a method for quickly aligning a blade array grinding and polishing fixture, using the above-mentioned quick alignment device, comprising the following steps:

[0009] S1. Fix the adapter plate on the 3R positioning block; install the 3R positioning block on the rotating seat; install the clamping seat on the adapter plate through the flange plate at the bottom, do not tighten the screws in the countersunk holes of the flange plate, and there is a gap T between the screws and the countersunk holes of the flange plate;

[0010] S2. Put the square frame on the clamping seat, move the square frame downward, so that the upper frame is put on the flange plate, and the lower frame is put on the adapter plate; rotate the adjustment screw on the lower frame to abut against the side of the adapter plate; rotate the adjustment screw on the upper frame to abut against the side of the flange plate;

[0011] S3. Install the blade core rod standard part on the clamping seat; establish a coordinate system with the center of the bottom surface of the adapter plate as the origin, the directions perpendicular to the two adjacent side surfaces of the adapter plate as the X-axis and the Y-axis, and the vertical direction as the Z-axis;

[0012] S4. Use a dial indicator to press on the cylindrical surface of the blade core rod standard part, rotate the rotating seat one circle, and determine the position of the axis of the blade core rod standard part in the X-axis and Y-axis directions through the dial indicator reading;

[0013] S5, according to the position determined in step S6, coordinate the adjustment screws on the upper frame and the lower frame to adjust the position of the flange plate relative to the adapter plate in the X-axis and Y-axis directions;

[0014] S6, repeating step S4 and step S5 until the position of the axis of the blade core rod standard part in the X-axis and Y-axis directions meets the requirements;

[0015] S7. Use a dial indicator to press on the side plane of the tenon edge plate of the blade core rod standard part, and move the dial indicator from one end of the side plane to the other end along the Y-axis direction to determine the angular direction of rotation of the blade core rod standard part relative to the Z-axis;

[0016] S8, determining the angular direction according to step S7, coordinating the adjustment screws on the upper frame and the lower frame to adjust the rotation angular direction of the flange plate relative to the Z axis;

[0017] S9, repeating steps S7 and S8 until the rotation angle of the blade core rod standard part relative to the Z axis meets the requirements;

[0018] S10. After the adjustment is completed, tighten the screws to secure the flange plate to the adapter plate.

[0019] Preferably, in step S1, when the adapter plate is fixedly mounted on the 3R positioning block, the center of the bottom surface of the adapter plate coincides with the center of the top surface of the 3R positioning block.

[0020] Preferably, in step S10, after the flange plate is fastened to the adapter plate, all the adjusting screws on the upper frame and the lower frame are loosened to remove the square frame.

[0021] Preferably, in step S3, when the blade core rod standard part is installed on the clamping seat, the tenon of the blade core rod standard part is clamped in the interval formed by the two teeth at the top of the clamping seat, and the tenon end face of the blade core rod standard part is required to abut against the stopper at the top of the clamping seat.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] (1) By adopting the rapid alignment device and method provided by the present invention, during alignment, the position of the flange plate relative to the adapter plate in the X-axis and Y-axis directions is adjusted by coordinating the adjustment screws on the upper frame and the lower frame; and the rotation angle of the flange plate relative to the Z-axis is adjusted by coordinating the adjustment screws on the upper frame and the lower frame. Then, the gap T is used to fine-tune the position of the entire clamping seat relative to the adapter plate in the X-axis and Y-axis directions to ensure that the axis of the clamped blade coincides with the axis of the 3R positioning block. At the same time, the gap T can also be used to adjust the entire clamping seat to rotate slightly around the Z-axis to meet the angular relationship between the clamped blade and the 3R positioning block.

[0024] (2) By adopting the rapid alignment device and method provided by the present invention, the problems existing in the traditional method of fine-tuning the clamping seat by tapping the flange plate are effectively overcome, the adjustment efficiency is greatly improved, and the adjustment error is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the blade array grinding and polishing fixture commonly used at present;

[0027] Figure 2 for Figure 1 Middle AA section view;

[0028] Figure 3 Schematic diagram of the blade array grinding and polishing fixture after clamping the blade core rod standard part;

[0029] Figure 4 A schematic diagram of the structure of the rapid alignment device provided by the present invention;

[0030] Figure 5 This is a schematic diagram of the rapid alignment device provided by the present invention cooperating with the blade array grinding and polishing fixture.

[0031] Explanation of the accompanying drawings: 1. Clamping seat; 1a. Flange plate; 1b. Clamping tooth; 1c. Stopper; 2. 3R positioning block; 3. Adapter plate; 4. Screw; 5. Blade core rod standard part; 5a. Side plane; 6. Square frame; 6a. Upper frame; 6b. Lower frame; 7. Adjusting screw. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] CNC array grinding and polishing of blades: refers to a processing method that uses a CNC system to control mechanical movement to automatically grind and polish the blade surface. The NC program code controls the spindle box and the workbench to interact with each other. The tool holder is installed on the spindle to clamp the tool rod. The tool rod is used to install and fix the grinding wheel and polishing wheel. The grinding wheel and polishing wheel are in contact with the blade clamped on the workbench to realize the principle of CNC grinding and polishing. Array refers to a process method in which two or more spindles and fixtures are installed on a CNC machine tool, arranged in an array, and polishing is performed simultaneously.

[0035] Combination Figure 1 , Figure 2 The figure shows a schematic diagram of the structure of a blade array grinding and polishing fixture commonly used at present, which includes a clamping seat 1 and a 3R positioning block 2, and a flange plate 1a is integrally formed at the bottom of the clamping seat 1. The 3R positioning block 2 is installed on a five-axis CNC machine tool, and an adapter plate 3 is fixedly connected to the 3R positioning block 2. Countersunk holes are provided at the four corners of the flange plate 1a, and the flange plate 1a is connected to the adapter plate 3 through screws 4 in the countersunk holes. A pair of latch teeth 1b are provided at the top of the clamping seat 1 for clamping the blade to be processed, and a stopper 1c is provided for limiting the tenon of the blade to be processed. The function of the adapter plate 3 is to connect the 3R positioning block 2 with the clamping seat 1.

[0036] Combination Figure 4 As shown, on the one hand, this embodiment provides a quick alignment device for a blade array grinding and polishing fixture, including a square frame 6, the upper half of the square frame 6 is an upper frame 6a, and the lower half is a lower frame 6b; a plurality of adjusting screws 7 are screwed on each side wall of the upper frame 6a and the lower frame 6b respectively; the upper frame 6a is used to accommodate the flange plate 1a of the clamping seat 1, and the inner end of the adjusting screw 7 on the upper frame 6a can abut against the side of the flange plate 1a; the lower frame 6b is used to accommodate the adapter plate 3 on the 3R positioning block 2, and the inner end of the adjusting screw 7 on the lower frame 6b can abut against the side of the adapter plate 3.

[0037] In this embodiment, three adjusting screws 7 are screwed on each side wall of the upper frame 6a and the lower frame 6b, respectively, and twelve adjusting screws 7 are provided on each frame.

[0038] Combination Figure 5 As shown, on the other hand, a method for quickly aligning a blade array grinding and polishing fixture, using the above-mentioned quick alignment device, comprises the following steps:

[0039] S1. Install the adapter plate 3 on the 3R positioning block 2; install the 3R positioning block 2 on the rotating seat; install the clamping seat 1 on the adapter plate 3 through the flange plate 1a at the bottom thereof, and do not tighten the screws 4 in the countersunk holes of the flange plate 1a, and there is a gap T between the screws 4 and the countersunk holes of the flange plate 1a. Specifically, when the adapter plate 3 is installed on the 3R positioning block 2, the center of the bottom surface of the adapter plate 3 coincides with the center of the top surface of the 3R positioning block 2, and the adapter plate 3 and the 3R positioning block 2 can be fastened and connected by pins and screws.

[0040] S2. Put the square frame 6 on the clamping seat 1, move the square frame 6 downward, so that the upper frame 6a is put on the flange plate 1a, and the lower frame 6b is put on the adapter plate 3; rotate the adjusting screw 7 on the lower frame 6b to abut against the side of the adapter plate 3; rotate the adjusting screw 7 on the upper frame 6a to abut against the side of the flange plate 1a.

[0041] S3. Install the blade mandrel standard part 5 on the clamping seat 1. Specifically, the tenon of the blade mandrel standard part 5 is clamped in the interval formed by the two clamping teeth 1b at the top of the clamping seat 1, and the tenon end face of the blade mandrel standard part 5 is required to abut against the stopper 1c at the top of the clamping seat 1. At this time, the blade mandrel standard part 5 is installed in place. Take the center of the bottom surface of the adapter plate 3 as the origin, the direction perpendicular to the two adjacent side surfaces of the adapter plate 3 as the X-axis and Y-axis, and the vertical direction as the Z-axis to establish a coordinate system.

[0042] S4. Use a dial indicator to press on the cylindrical surface of the blade core rod standard part 5, rotate the rotating seat one circle, and determine the position of the axis of the blade core rod standard part 5 in the X-axis and Y-axis directions through the dial indicator reading.

[0043] S5. According to the position determined in step S6, the adjusting screws 7 on the upper frame 6a and the lower frame 6b are coordinated to adjust the position of the flange plate 1a relative to the adapter plate 3 in the X-axis and Y-axis directions.

[0044] S6. Repeat step S4 and step S5 until the position of the axis of the blade core rod standard part 5 in the X-axis and Y-axis directions meets the requirements.

[0045] S7. Use a dial indicator to press on the side plane 5a of the tenon edge plate of the blade core rod standard part 5, and move the dial indicator from one end of the side plane 5a to the other end along the Y-axis direction to determine the angular direction of rotation of the blade core rod standard part 5 relative to the Z-axis.

[0046] S8. Determine the angular direction according to step S7, and coordinate the adjusting screws 7 on the upper frame 6a and the lower frame 6b to adjust the rotation angular direction of the flange plate 1a relative to the Z axis.

[0047] S9, repeat steps S7 and S8 until the rotation angle of the blade core rod standard part 5 relative to the Z axis meets the requirements.

[0048] S10, after the adjustment is completed, tighten the screws 4 to fasten the flange plate 1a to the adapter plate 3. Then loosen all the adjustment screws 7 on the upper frame 6a and the lower frame 6b, and remove the square frame 6.

[0049] Repeating the above steps S1 to S10, and continuing to adjust the next blade array grinding and polishing fixture, two or more blade array grinding and polishing fixtures with positions and angles within the relative tolerance range can be obtained.

[0050] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rapid alignment device for blade array grinding and polishing fixture, characterized in that: It comprises a square frame (6), wherein the upper half of the square frame (6) is an upper frame (6a), and the lower half is a lower frame (6b); a plurality of adjusting screws (7) are screwed on each side wall of the upper frame (6a) and the lower frame (6b); The upper frame (6a) is used to accommodate the flange plate (1a) of the clamping seat (1), and the inner end of the adjusting screw (7) on the upper frame (6a) can be against the side of the flange plate (1a); The lower frame (6b) is used to accommodate the adapter plate (3) on the 3R positioning block (2), and the inner end of the adjustment screw (7) on the lower frame (6b) can be against the side surface of the adapter plate (3).

2. The rapid alignment device for blade array grinding and polishing fixture according to claim 1, characterized in that: Three adjustment screws (7) are screwed onto each side wall of the upper frame (6a) and the lower frame (6b).

3. A method for quickly aligning a blade array grinding and polishing fixture, characterized in that: The rapid alignment device according to any one of claims 1 to 2 comprises the following steps: S1. The adapter plate (3) is fixedly mounted on the 3R positioning block (2); and the 3R positioning block (2) is mounted on the rotating seat; the clamping seat (1) is mounted on the adapter plate (3) through the flange plate (1a) at the bottom thereof, and the screws (4) in the countersunk holes of the flange plate (1a) are not tightened, and a gap T exists between the screws (4) and the countersunk holes of the flange plate (1a); S2. Sleeve the square frame (6) onto the clamping seat (1), and move the square frame (6) downward so that the upper frame (6a) is sleeved onto the flange plate (1a), and the lower frame (6b) is sleeved onto the adapter plate (3); rotate the adjusting screw (7) on the lower frame (6b) to abut against the side of the adapter plate (3); rotate the adjusting screw (7) on the upper frame (6a) to abut against the side of the flange plate (1a); S3, installing the blade core rod standard part (5) on the clamping seat (1); establishing a coordinate system with the center of the bottom surface of the adapter plate (3) as the origin, the directions perpendicular to the two adjacent side surfaces of the adapter plate (3) as the X-axis and the Y-axis, and the vertical direction as the Z-axis; S4, using a dial indicator to press on the cylindrical surface of the blade core rod standard part (5), rotating the rotating seat one circle, and determining the position of the axis of the blade core rod standard part (5) in the X-axis and Y-axis directions by reading the dial indicator; S5, according to the position determined in step S6, coordinate the adjustment screws (7) on the upper frame (6a) and the lower frame (6b) to adjust the position of the flange plate (1a) relative to the adapter plate (3) in the X-axis and Y-axis directions; S6, repeating step S4 and step S5 until the position of the axis of the blade core rod standard part (5) in the X-axis and Y-axis directions meets the requirements; S7, using a dial indicator to press on the side plane (5a) of the tenon edge plate of the blade core rod standard part (5), and moving the dial indicator from one end of the side plane (5a) to the other end along the Y-axis direction to determine the angular direction of rotation of the blade core rod standard part (5) relative to the Z-axis; S8, determining the angular direction according to step S7, coordinating the adjusting screws (7) on the upper frame (6a) and the lower frame (6b) to adjust the rotational angular direction of the flange plate (1a) relative to the Z axis; S9, repeating steps S7 and S8 until the rotation angle of the blade core rod standard part (5) relative to the Z axis meets the requirements; S10. After the adjustment is completed, tighten the screws (4) so ​​that the flange plate (1a) is fastened to the adapter plate (3).

4. A method for quickly aligning a blade array grinding and polishing fixture as claimed in claim 3, characterized in that: In the step S1, when the adapter plate (3) is fixedly mounted on the 3R positioning block (2), the center of the bottom surface of the adapter plate (3) coincides with the center of the top surface of the 3R positioning block (2).

5. A method for quickly aligning a blade array grinding and polishing fixture as claimed in claim 3, characterized in that: In the step S10, after the flange plate (1a) and the adapter plate (3) are fastened together, all the adjusting screws (7) on the upper frame (6a) and the lower frame (6b) are loosened, and the square frame (6) is removed.

6. A method for quickly aligning a blade array grinding and polishing fixture as claimed in claim 3, characterized in that: In step S3, when the blade core rod standard part (5) is installed on the clamping seat (1), the tenon of the blade core rod standard part (5) is clamped in the gap formed by the two clamping teeth (1b) at the top of the clamping seat (1), and the end face of the tenon of the blade core rod standard part (5) is required to abut against the stopper (1c) at the top of the clamping seat (1).

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