Vertical balance rapid clamping tool and method for drum part

Abstract

The invention relates to a vertical balance rapid clamping tool and method for drum parts, and belongs to the technical field of tool design. The tool comprises a clamp body, and axial positioning blocks are evenly distributed on the edge of the clamp body in the circumferential direction; and the clamp main body and the drum part are in anti-rotation positioning connection through the square rod pin and the square matching hole. During rapid clamping, the vertical balance rapid clamping tool of the part is connected with a balancing machine; the part is hoisted; a square rod pin is placed in a connecting hole of the part; the part is moved to the position above the tool; in the descending process of the part, the square rod pin is adjusted to be aligned with and inserted into a center hole of the axial positioning block, and the part and the tool are positioned; the part continues to fall to be attached to the axial positioning block; and then one operator locks the square rod pin. According to the tool, the freedom degree of the pin in the circumferential direction can be limited in the assembling process, it is guaranteed that the nut does not move in the locking process, and rapid and stable installation and fastening connection of the drum part and the tool are achieved.

Description

Technical Field

[0001] This invention belongs to the field of tooling design technology, and in particular relates to a vertical balancing quick clamping tool and method for drum parts. Background Technology

[0002] The drum component is a critical rotating part of an aero-engine, such as... Figures 1-2 As shown, the drum's maximum outer diameter D1 exceeds Φ600mm, the drum's center diameter D2 is approximately Φ200mm, and the total height C1 is approximately 450mm. The part has mounting planes at both the front and rear, with precision connection holes on the upper part of each plane, making it a typical large drum component. The component structure includes a front mounting plane A1, a rear mounting plane A2, multi-stage spokes A3, a front mounting edge precision connection hole B1, and a rear mounting edge precision connection hole B2. The diameter of the front mounting edge precision connection hole D3 is approximately Φ8mm, the diameter of the distribution circle of the front mounting edge precision connection holes D4 is approximately Φ520mm, and the thickness of the front mounting edge C2 is approximately 6mm. The heights of the balancing front and rear alignment surfaces C3 and C4, after finishing, require vertical balancing to obtain the unbalance values ​​and angular direction of the part at these heights. The drum's balance value has a significant impact on engine performance and is a key technical parameter that needs to be controlled.

[0003] Currently, the assembly process of the vertical balancing drum has the following drawbacks. First, both installation and disassembly require two operators, consuming significant human resources. Second, due to the high height of the drum components, the small diameter of the disc, and the closed cavity formed by the lowest-level spoke and the balancing clamp, which is not visually accessible, the internal hexagonal size of the locking pin is small. When using a special hexagonal wrench to stop and limit the locking pin, it is difficult to insert the wrench head into the locking pin by hand, requiring multiple trial installations, resulting in low installation efficiency. Third, the spokes of the drum unit have long overhangs. The distance on one side from the drum center diameter D2 to the diameter D4 of the precision connection hole distribution circle on the front mounting edge is approximately 160mm. Adding the length of the manual handheld part, which is about 80mm, the total length of the Allen wrench needs to be greater than 240mm. Standard Allen wrenches are too short to reach the locking pin position. It is necessary to design a non-standard extended Allen wrench based on the structure and size of the part. The increased weight of the wrench affects the hand's perception, increases the installation difficulty, and increases manufacturing costs. Therefore, the vertical flat inspection process of large drum units for aero-engines urgently needs a clamping fixture and method that can quickly and conveniently achieve drum unit installation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a vertical balancing quick clamping fixture and method for drum parts. This fixture is used for the rapid clamping of large drum parts during balancing on a vertical balancing machine. By applying an axial positioning and locking device for the drum, the balancing process of the drum parts is achieved quickly and stably, solving the difficulty of securing complex drum parts during balancing. This improves the balancing efficiency of the drum and has broad application prospects, making it suitable for widespread use in the vertical balancing of large drum parts.

[0005] A vertical balancing quick clamping fixture for a drum part includes a fixture body with axial positioning blocks evenly distributed along the circumferential direction on the edge of the fixture body; the fixture body and the drum part are connected for anti-rotation positioning through a square pin and a square mating hole.

[0006] The main body of the clamp is a conical disc structure with a concave center.

[0007] The six axial positioning blocks are evenly distributed circumferentially on the fixture body.

[0008] Each axial positioning block is connected to the fixture body via positioning block fastening pins.

[0009] The three positioning block fastening pins are evenly distributed along the circumference of the axial positioning block.

[0010] The axial positioning block has a central hole with a square cross-section in the middle, and the intersection of the square holes is rounded.

[0011] The cross-section of the part where the square rod pin mates with the axial positioning block is square.

[0012] The square rod pin has a stepped structure. The diameter of the head step is 0.1 mm smaller than the diameter of the precision connection hole on the front mounting edge of the drum part, and the height of the head step is 0.5 mm smaller than the thickness of the front mounting edge of the drum part. The cross-section of the middle step is square, and its width is 0.2 mm smaller than the width of the center hole of the axial positioning block. The lower step has a threaded structure, and the outer diameter of the thread is smaller than the width of the middle step.

[0013] The fixture body is provided with radial positioning pins for positioning with the drum part.

[0014] A vertical balancing quick clamping method for a drum part, employing the aforementioned vertical balancing quick clamping fixture for a drum part, specifically includes:

[0015] Connect the vertical balancing quick clamping fixture of the parts to the balancing machine;

[0016] Lift the parts;

[0017] Place the square pin into the connecting hole of the part; move the part above the tooling;

[0018] During the part's descent, the square pin is aligned with the center hole of the axial positioning block and inserted to position the part and tooling.

[0019] The part continues to fall until it is in contact with the axial positioning block;

[0020] Tighten the square rod pin.

[0021] By employing the above technical solution, the present invention has at least the following beneficial effects:

[0022] This invention enables safe, efficient, and rapid fastening and disassembly. By designing the fixture while maintaining the original tooling structure, it restricts the pin's circumferential freedom, ensuring no movement during nut tightening. This allows for rapid and stable installation and fastening of the drum part to the tooling, solving the problem of difficult circumferential positioning of the locking pin in the balancing fixture and low assembly efficiency during the installation and tightening process of large drum parts in the balancing inspection process. It meets the requirements for vertical balancing inspection of large drum parts, ensures manufacturing quality, and has profound significance in improving the efficiency of drum part balancing inspection. Attached Figure Description

[0023] Figure 1 This is a top view of the drum cylinder component;

[0024] Figure 2 This is the front view of the drum cylinder part;

[0025] Where: A1 is the front mounting plane, A2 is the rear mounting plane, A3 is the multi-stage spoke, B1 is the precision connection hole of the front mounting edge, B2 is the precision connection hole of the rear mounting edge, C1 is the total height of the part, C2 is the thickness of the front mounting edge, C3 is the height of the balance front correction surface, C4 is the height of the balance rear correction surface, D1 is the maximum outer diameter of the drum, D2 is the diameter of the drum disc center, D3 is the diameter of the precision connection hole of the front mounting edge, and D4 is the diameter of the distribution circle of the precision connection hole of the front mounting edge.

[0026] Figure 3 A top view of a vertical balancing quick clamping fixture for a drum part provided by the present invention;

[0027] Figure 4 for Figure 3 AA view;

[0028] Figure 5 The front view of the axial positioning block in a vertical balancing quick clamping fixture for a drum part provided by the present invention;

[0029] Figure 6 A top view of the axial positioning block in a vertical balancing quick clamping fixture for a drum part provided by the present invention;

[0030] Where: A4 is the positioning surface on the positioning block, B6 is the center hole, C5 is the width of the center hole, and D8 is the transition fillet of the center hole;

[0031] Figure 7 A bottom view of the locking pin in a vertical balancing quick clamping fixture for a drum part provided by the present invention.

[0032] Figure 8 Side view of the locking pin in a vertical balancing quick clamping fixture for a drum part provided by the present invention. Figure 1 ;

[0033] Figure 9 Side view of the locking pin in a vertical balancing quick clamping fixture for a drum part provided by the present invention. Figure 2 ;

[0034] Figure 10 A top view of the locking pin in a vertical balancing quick clamping fixture for a drum part provided by the present invention.

[0035] Where: B7 is the cube, C6 is the width of the cube, C7 is the height of the head step, D9 is the diameter of the head step, and D10 is the outer diameter of the pin thread;

[0036] Figure 11 This is a schematic diagram showing the movement of the drum part to the tooling during the implementation of an embodiment of the present invention;

[0037] Figure 12 This is a schematic diagram showing the connection between the drum part and the tooling during the implementation of an embodiment of the present invention;

[0038] In the picture:

[0039] 01. Drum cylinder parts; 02. Fixture body; 03. Axial positioning block; 04. Locking pin; 05. Positioning block washer; 06. Positioning block locking nut; 07. Positioning block fastening pin; 08. Radial positioning pin; 09. Positioning pin washer; 010. Positioning pin locking nut; 011. Torque limiter wrench. Detailed Implementation

[0040] To better explain and facilitate understanding of the present invention, the technical solution and effects of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 3-10 As shown, the present invention provides a vertical balancing quick clamping fixture for a drum part, including a fixture body 02, wherein axial positioning blocks 03 are evenly distributed along the circumferential direction on the edge of the fixture body 02; and radial positioning pins 08 are evenly distributed along the circumferential direction on the fixture body 02.

[0042] The fixture body 02 has a conical disc structure with a concave center. Six axial positioning blocks 03 are evenly distributed circumferentially on the fixture body 02, located at its edge. Each axial positioning block 03 is connected to the fixture body 02 via positioning block fastening pins 07. Each axial positioning block 03 has three positioning block fastening pins 07, evenly distributed circumferentially. Furthermore, each axial positioning block 03 has a square-section central hole B6 in its center, with a rounded corner (center hole transition rounded corner D8) at the intersection of the square hole, used for connection with the drum part 01. During assembly, the fixture body 02 is connected to the drum part 01 via locking pins 04. A positioning block washer 05 is provided between the positioning block locking nut 06, which mates with the locking pin 04, and the fixture body 02.

[0043] Furthermore, the locking pin 04 has a stepped structure. The diameter D9 of the head step is 0.1 mm smaller than the diameter D3 of the precision connection hole B1 on the front mounting edge of the drum part 01. The height C7 of the head step is 0.5 mm smaller than the thickness C2 of the front mounting edge of the drum part 01. The middle step is a cuboid B7 with a width C6, which is 0.2 mm smaller than the width C5 of the center hole of the axial positioning block 03. The lower step has a threaded structure with a pin thread outer diameter D10, which is smaller than the width C6 of the cuboid. The positioning block locking nut 06 engages with the lower step of the locking pin 04. When the locking pin 04 is installed in the axial positioning block 03, the cuboid B7 of the locking pin 04 engages with the center hole B6 of the axial positioning block 03, forming a stop in the same circumferential direction. The positioning block locking nut 06 prevents the locking pin 04 from rotating during tightening, ensuring a secure fastening effect.

[0044] The fixture body 02 is provided with two radially locating pins 08 evenly distributed in the circumferential direction. The two radially locating pins 08 are used for positioning the parts. A locating pin locking nut 010 that cooperates with the radially locating pins 08 is provided between the locating pin washer 09 and the fixture body 02.

[0045] The fixture body 02 has a fixture center positioning hole B4 in the middle. The diameter D5 of the fixture center positioning hole B4 is precisely matched with the outer diameter of the main shaft of the vertical balancing machine to ensure that the balancing fixture is concentric with the main shaft of the balancing machine. The fixture positioning surface A5 of the fixture body 02 is a surface that fits against the positioning surface of the equipment flange.

[0046] The method for quick clamping of the drum part using the aforementioned vertical balancing quick clamping fixture is as follows:

[0047] First, connect the vertical balancing quick-clamping fixture for drum part 01 to the balancing machine. Then, use a lifting tool to lift the part by passing it through the precision connection hole B2 on the rear mounting edge of drum part 01. Next, evenly distribute the six locking pins 04 into the precision connection holes B1 on the front mounting edge of drum part 01. Finally, move drum part 01 above the fixture. Figure 11 As shown.

[0048] After bringing the drum part 01 close to the tooling, slowly lower it and adjust the cuboid B7 of the locking pin 04 to align with the center hole B6 of the axial positioning block 03 and insert it into it. When the radial positioning pin 08 extends into the precision connection hole B1 of the front mounting edge, the center of the drum part 01 and the center of the tooling are precisely positioned.

[0049] Continue to slowly lower the part so that the front mounting plane A1 of the drum part 01 is in contact with the positioning surface A4 on the positioning block of the axial positioning block 03. After the part is placed stably, remove the lifting device.

[0050] With the hand-held locking pin 04 in place, the positioning block washer 05 is inserted into the locking pin 04. The positioning block locking nut 06 is then manually rotated to ensure the internal and external threads engage, preventing it from falling out. Because the cuboid B7 of the locking pin 04 and the center hole B6 of the axial positioning block 03 are both square structures, they limit the locking pin 04 in the circumferential direction, preventing it from rotating. Tightening the positioning block locking nut 06 allows one operator to complete the fastening connection between the drum part 01 and the balance fixture. Figure 12 As shown.

[0051] The operator uses the force-limiting wrench 011 to rotate the positioning block locking nut 06, so that the locking pin 04 and the positioning block locking nut 06 are gradually locked. When the set force limit value is reached, the installation and fastening of the drum part 01 and the balancing fixture are completed, and the part and tooling are stably connected. The balancing machine can then be started to measure the imbalance.

[0052] Compared with existing technologies, this invention allows for the installation and disassembly of the drum part 01 to be completed by only one operator, saving labor costs. Simultaneously, the improved locking pin 04 and axial positioning block 03 utilize a square structure to achieve circumferential limiting and stopping of the locking pin 04. During the assembly of the drum part 01, there is no need to use a wrench to circumferentially limit the locking pin 04, facilitating the tightening process of the positioning block locking nut 06 and saving the design and manufacturing costs of a dedicated extended hex wrench, thus reducing costs. Furthermore, this invention avoids the blind use of a dedicated hex wrench for trial installation and limiting of the locking pin 04, enabling rapid and stable connection and disassembly between the drum part 01 and the balancing fixture, shortening installation time, reducing machine downtime, improving assembly efficiency, and reducing manufacturing costs.

Claims

1. A vertical balancing quick-clamping fixture for drum parts, characterized in that: It includes a clamp body, with axial positioning blocks evenly distributed along the circumferential edge of the clamp body; the clamp body and the drum part are connected for anti-rotation positioning through square rod pins and square mating holes.

2. The vertical balancing quick-clamping fixture for a drum part according to claim 1, characterized in that: The main body of the clamp is a conical disc structure with a concave center.

3. The vertical balancing quick-clamping fixture for a drum part according to claim 1, characterized in that: The six axial positioning blocks are evenly distributed circumferentially on the fixture body.

4. The vertical balancing quick-clamping fixture for a drum part according to claim 1, characterized in that: Each axial positioning block is connected to the fixture body via positioning block fastening pins.

5. The vertical balancing quick clamping fixture for a drum part according to claim 4, characterized in that: The three positioning block fastening pins are evenly distributed along the circumference of the axial positioning block.

6. The vertical balancing quick-clamping fixture for a drum part according to claim 1, characterized in that: The axial positioning block has a central hole with a square cross-section in the middle, and the intersection of the square holes is rounded.

7. The vertical balancing quick-clamping fixture for a drum part according to claim 6, characterized in that: The cross-section of the part where the square rod pin mates with the axial positioning block is square.

8. The vertical balancing quick-clamping fixture for a drum part according to claim 7, characterized in that: The square rod pin has a stepped structure. The diameter of the head step is 0.1mm smaller than the diameter of the precision connection hole on the front mounting edge of the drum part, and the height of the head step is 0.5mm smaller than the thickness of the front mounting edge of the drum part. The cross-section of the middle step is square, and its width is 0.2mm smaller than the width of the center hole of the axial positioning block. The lower step has a threaded structure, and the outer diameter of the thread is smaller than the width of the middle step.

9. The vertical balancing quick-clamping fixture for a drum part according to claim 1, characterized in that: The fixture body is provided with radial positioning pins for positioning with the drum part.

10. A vertical balancing quick clamping method for a drum part, employing the vertical balancing quick clamping fixture for a drum part as described in claim 1, characterized in that, Specifically, it includes: Connect the vertical balancing quick clamping fixture of the parts to the balancing machine; Lift the parts; Place the square pin into the connecting hole of the part; Move the part above the tooling; During the part's descent, the square pin is aligned with the center hole of the axial positioning block and inserted to position the part and tooling. The part continues to fall until it is in contact with the axial positioning block; Tighten the square rod pin.

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