Quick-release fixture for group clamping of stator blades without mounting plate for wire-cut machine tools

Abstract

The present invention belongs to the field of machining, and specifically relates to a quick-install fixture for group clamping of stator blades without mounting plates for wire-cutting machine tools. The technical solution of the present invention is as follows: a quick-install fixture for group clamping of stator blades without mounting plates for wire-cutting machine tools, comprising a base, a positioning block, an X-direction multi-layer hollow flexible clamping device, a Y-direction pull-back flexible clamping device, a Z-direction snap-on clamping device and a magnetic blade clamping device, wherein the positioning block is fixedly arranged on the base, the Z-direction snap-on clamping device is arranged on the positioning block, the X-direction multi-layer hollow flexible clamping device is connected to the base and is located on the right side of the positioning block, the Y-direction pull-back flexible clamping device is installed in conjunction with the base, and the magnetic blade clamping device is quickly detachably connected to the base. The present invention can solve the problems of low blade processing efficiency and poor blade clamping and positioning stability, and effectively improve blade clamping and processing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of machining, and in particular relates to a quick-install fixture for clamping stator blades in groups without a mounting plate for a wire-cutting machine tool. Background Art

[0002] The blanks for aircraft engine stator blades without mounting plates are made of 2mm to 2.5mm thick sheet metal with outer dimensions ≤30mm x 60mm and a tenon tolerance of 0.1mm. The blade's leading and trailing edge contours and blade tip machining and cutting processes are performed using medium-speed wire-cut EDM machines, using a single-blade clamping method. This results in low production efficiency and poor part consistency. Summary of the Invention

[0003] The present invention provides a quick-install fixture for group clamping of stator blades without a mounting plate for a wire-cutting machine tool, which can solve the problems of low blade processing efficiency and poor blade clamping and positioning stability, and effectively improve the blade clamping and processing efficiency.

[0004] The technical solutions of the present invention are as follows:

[0005] A quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools comprises a base, a positioning block, an X-direction multi-layer hollow flexible clamping device, a Y-direction pull-back flexible clamping device, a Z-direction snap-on clamping device and a magnetic blade clamping device. The positioning block is fixedly arranged on the base, the Z-direction snap-on clamping device is arranged on the positioning block, the X-direction multi-layer hollow flexible clamping device is connected to the base and is located on the right side of the positioning block, the Y-direction pull-back flexible clamping device is installed in cooperation with the base, and the magnetic blade clamping device is quickly connected to the base.

[0006] Furthermore, the described quick-release fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools, the X-direction multi-layer hollow flexible pressing device includes a support block, a layered pressing block, a side block and a top screw, the support block is fixedly arranged on the base and is located on the right side of the positioning block, the side block is fixedly connected to the right side of the base; the support block is provided with a slide groove, the layered pressing block is provided with a slider, the layered pressing block and the support block are connected by the slider and the slide groove; the top screw is screwed on the side block, and the front end of the top screw is connected to the layered pressing block.

[0007] Furthermore, in the quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools, a plurality of pressing pieces arranged in parallel in the horizontal direction are provided on the left side of the layered pressing block.

[0008] Furthermore, the quick-release fixture for group clamping stator blades without mounting plates for wire-cutting machine tools has 8-10 pressing plates, which are hollow in structure and have a deformation of 0.2 mm to meet the positioning error requirements between blades.

[0009] Furthermore, the quick-release fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools, the Y-direction backward-pull type flexible clamping device includes a backward-pull type pressure plate, a coil compression spring and a clamping screw, the base is provided with a through hole, the through hole is arranged in the front-to-back direction and is located below the positioning block, and an annular step is provided in the through hole; the backward-pull type pressure plate is placed on the front side of the base, the clamping screw is inserted into the through hole from the rear side of the base and is screwed together with the backward-pull type pressure plate; the coil compression spring is sleeved on the clamping screw and is located between the annular step and the backward-pull type pressure plate.

[0010] Furthermore, the quick-release fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools is provided with an angular limit pin on the front side of the base, and an oblong positioning hole is provided on the lower part of the rear-pull pressure plate. The rear-pull pressure plate is mounted on the angular limit pin through the oblong positioning hole to ensure the clamping direction.

[0011] Furthermore, the quick-release fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools is provided with two parallel clamping forks on the upper part of the rear-pull pressure plate, and the outside of the clamping forks is provided with flexible glue in an integral rubber-wrapped manner, and its deformation is 0.2 mm to meet the positioning error requirements between blades.

[0012] Furthermore, the described quick-release fixture for group clamping of stator blades without mounting plate for wire cutting machine tools, the magnetic blade clamping device includes a slide rail, a left auxiliary pressure plate, a right auxiliary pressure plate, a stud bolt, a support block 1, a support block 2 and a magnetic strip, the left auxiliary pressure plate and the right auxiliary pressure plate are slidingly fitted on the slide rail, the threads on both sides of the stud bolt are in opposite directions, the left auxiliary pressure plate and the right auxiliary pressure plate are respectively screwed together with the two sides of the stud bolt; the right end of the slide rail is fixedly connected to the left end of support block 1, and the front end of support block 2 is fixedly connected to the right end of support block 1 at a right angle; magnetic strips are embedded on the left side and top of the rear of support block 2; a mounting groove is provided on the lower part of the side stand, and support block 2 is inserted into the mounting groove and connected to the side stand and the base through the magnetic strip.

[0013] Furthermore, in the quick-install fixture for group clamping stator blades without mounting plates for a wire-cutting machine tool, the left auxiliary pressing plate and the right auxiliary pressing plate are provided with contoured pressing surfaces, and foam glue is affixed to the contoured pressing surfaces.

[0014] The beneficial effects of the present invention are:

[0015] 1. This invention uses the X, Y, and Z planes of the blade process tenons as positioning references. Blades are stacked during installation, allowing multiple blades to be clamped at once. This solves the problems of low blade processing efficiency and poor blade clamping and positioning stability, effectively improving blade clamping and processing efficiency. Flexible clamping devices designed in the X and Y directions can accommodate the tolerances between different blade process tenons, ensuring that all blade positioning surfaces are aligned, effectively improving blade clamping stability, and controlling blade clamping errors to within 0.008mm.

[0016] 2. The X-axis multi-layer hollow flexible clamping device can be designed with different sizes and specifications according to different blade types, ensuring that each blade is equipped with an independent clamping piece. The clamping piece adopts a hollow design with a deformation of 0.2mm to meet the process tenon tolerance between blades. The layered clamping block is designed with a lateral slide, and the top screw is tightened with a torque-limiting wrench to ensure consistent locking force among different operators, improving the consistency of blade clamping.

[0017] 3. The Y-axis pull-back flexible clamping device features a fully encapsulated rubberized and mold-removing mechanism. The contact surface with the blade tenon is elastically compressed, with a deformation limit of 0.2mm, meeting the tenon tolerances between blades. This pull-back clamping design addresses the limited space available for wire-cut machining and meets the requirements for molybdenum wire machining. An internal limit spring automatically releases the pull-back clamping plate when the clamping screw is loosened, facilitating part removal. The clamping screw is tightened with a torque-limiting wrench, ensuring consistent locking force between operators and improving blade clamping consistency.

[0018] 4. The Z-axis snap-on clamping device can realize one-button clamping function.

[0019] 5. During the tenon cutting process, a magnetic blade clamping device is used for easy disassembly and effectively ensures the stability of the blade clamping position, preventing the blade from falling after cutting and causing flash defects. The device can be manually removed during the wire cutting process, improving the convenience and functionality of the fixture. The left and right auxiliary pressure plates are opened and closed by stud bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the main view of the fixture;

[0021] Figure 2 It is the top view of the fixture;

[0022] Figure 3 This is the left view of the fixture;

[0023] Figure 4 Schematic diagram of blades being installed in groups on a fixture;

[0024] Figure 5 This is the main view of the X-direction multi-layer hollow flexible pressing device;

[0025] Figure 6 This is a top view of the X-direction multi-layer hollow flexible pressing device;

[0026] Figure 7 This is the left view of the X-direction multi-layer hollow flexible pressing device;

[0027] Figure 8 This is the front view of the Y-direction backward-pull flexible pressing device and the base;

[0028] Figure 9 It is a sectional view of the left part of the Y-direction backward-pull type flexible pressing device and the base;

[0029] Figure 10 This is the front view of the magnetic blade clamping device;

[0030] Figure 11 It is a top view of the magnetic blade clamping device;

[0031] Figure 12 This is the left view of the magnetic blade clamping device. DETAILED DESCRIPTION

[0032] like Figure 1-12 As shown, a quick-install fixture for group clamping of stator blades without mounting plate for wire cutting machine tools includes a base 1, a positioning block 2, an X-direction multi-layer hollow flexible pressing device 3, a Y-direction pull-back flexible pressing device 4, a Z-direction snap-on pressing device 5 and a magnetic blade clamping device 6. The positioning block 2 is fixedly arranged on the base 1, the Z-direction snap-on pressing device 5 is arranged on the positioning block 2, the X-direction multi-layer hollow flexible pressing device 3 is connected to the base 1 and is located on the right side of the positioning block 2, the Y-direction pull-back flexible pressing device 4 is installed in conjunction with the base 1, and the magnetic blade clamping device 6 is quickly connected to the base 1.

[0033] The X-direction multi-layer hollow flexible pressing device 3 includes a support block 11, a layered pressing block 12, a side block 13 and a top screw 14. The support block 11 is fixedly arranged on the base 1 and is located on the right side of the positioning block 2. The side block 13 is fixedly connected to the right side of the base 1; the support block 11 is provided with a slide groove, and the layered pressing block 12 is provided with a slider. The layered pressing block 12 and the support block 11 are connected through the slider and the slide groove; the top screw 14 is screwed on the side block 13, and the front end of the top screw 14 is connected to the layered pressing block 12; the left part of the layered pressing block 12 is provided with 8 pressing pieces 15 arranged in parallel in the horizontal direction; the pressing piece 15 is a hollow structure, and its deformation amount is 0.2mm.

[0034] The Y-direction, rearward-pull, flexible clamping device 4 comprises a rearward-pull pressure plate 21, a helical compression spring 24, and a clamping screw 23. The base 1 is provided with a through-hole, arranged in a front-to-back direction and located below the positioning block 2. The through-hole is provided with an annular step. The rearward-pull pressure plate 21 is positioned on the front side of the base 1. The clamping screw 23 is inserted into the through-hole from the rear side of the base 1 and is screwed to the rearward-pull pressure plate 21. The helical compression spring 24 fits over the clamping screw 23 and is positioned between the annular step and the rearward-pull pressure plate 21. An angular stop pin 22 is provided on the front side of the base 1. An oblong positioning hole is provided at the bottom of the rearward-pull pressure plate 21. The rearward-pull pressure plate 21 fits over the angular stop pin 22 through the oblong positioning hole to ensure the clamping direction. Two parallel clamping forks are provided on the top of the rearward-pull pressure plate 21. The exterior of the clamping forks is coated with flexible rubber 25, with a deformation of 0.2 mm.

[0035] The Z-direction snap-on pressing device 5 is a standard part of model QLSNDM08-01.

[0036] The magnetic blade clamping device 6 includes a slide rail 33, a left auxiliary pressure plate 31, a right auxiliary pressure plate 32, a stud bolt 34, a support block 1 35, a support block 2 36 and a magnetic strip 37. The left auxiliary pressure plate 31 and the right auxiliary pressure plate 32 are slidably fitted on the slide rail 33. The threads on both sides of the stud bolt 34 are rotated in opposite directions. The left auxiliary pressure plate 31 and the right auxiliary pressure plate 32 are respectively screwed together with the two sides of the stud bolt 34; the right end of the slide rail 33 is fixedly connected to the left end of the support block 1 35, and the front end of the support block 2 36 is fixedly connected to the right end of the support block 1 35 at a right angle; a magnetic strip 37 is embedded on the left side and top of the rear of the support block 2 36; a mounting groove 16 is provided at the lower part of the side stand 13, and the support block 2 36 is inserted into the mounting groove 16 and connected to the side stand 13 and the base 1 through the magnetic strip 37. The left auxiliary pressing plate 31 and the right auxiliary pressing plate 32 are provided with contoured pressing surfaces, on which foam glue 38 is affixed.

[0037] The working process is as follows: in the process of cutting the outer contour online, the magnetic blade clamping device is manually removed; the clamp uses the X, Y, and Z surfaces of the process tenon of the blade 7 as the positioning reference and clamps the eight blades 7 placed in a stack in a counter-pressing manner. The X-direction multi-layer hollow flexible pressing device 3, the Y-direction pull-back flexible pressing device 4, and the Z-direction snap-on pressing device 5 implement X, Y, and Z surface pressing to perform the process of cutting the outer contour online; after the process of cutting the outer contour is completed, the process tenon cutting process is performed; in the process tenon cutting process, the magnetic blade clamping device 6 is installed; the left auxiliary pressure plate 31 and the right auxiliary pressure plate 32 are controlled by the stud bolts 34 to clamp the blade body of the blade 7 to perform the process tenon cutting process; it plays a supporting role in the process of cutting the process tenon. When the process tenon is cut, the blade 7 can maintain its original clamping posture and prevent the blade 7 from sinking due to its own weight, resulting in tearing burrs at the tail end of the cutting track.

Claims

1. A quick-install fixture for group clamping stator blades without mounting plate for wire-cut machine tools, characterized in that: It includes a base, a positioning block, an X-direction multi-layer hollow flexible pressing device, a Y-direction pull-back flexible pressing device, a Z-direction snap-on pressing device and a magnetic blade clamping device. The positioning block is fixedly arranged on the base, the Z-direction snap-on pressing device is arranged on the positioning block, the X-direction multi-layer hollow flexible pressing device is connected to the base and is located on the right side of the positioning block, the Y-direction pull-back flexible pressing device is installed in conjunction with the base, and the magnetic blade clamping device is quickly connected to the base. The X-direction multi-layer hollow flexible pressing device includes a support block, a layered pressing block, a side stand block and a top screw, wherein the support block is fixedly arranged on the base and is located on the right side of the positioning block, and the side stand block is fixedly connected to the right side of the base; the support block is provided with a slide groove, and the layered pressing block is provided with a slider, and the layered pressing block and the support block are connected by the slider and the slide groove; the top screw is screwed on the side stand block, and the front end of the top screw is connected to the layered pressing block; The Y-direction rear-pull type flexible pressing device includes a rear-pull type pressing plate, a coil compression spring and a pressing screw, wherein the base is provided with a through hole, the through hole is arranged in the front-to-back direction and is located below the positioning block, and an annular step is provided in the through hole; the rear-pull type pressing plate is placed on the front side of the base, the pressing screw is inserted into the through hole from the rear side of the base and is screwed together with the rear-pull type pressing plate; the coil compression spring is sleeved on the pressing screw and is located between the annular step and the rear-pull type pressing plate; The magnetic blade clamping device includes a slide rail, a left auxiliary pressure plate, a right auxiliary pressure plate, a stud bolt, a support block 1, a support block 2 and a magnetic strip. The left auxiliary pressure plate and the right auxiliary pressure plate are slidably fitted on the slide rail, the threads on both sides of the stud bolt are rotated in opposite directions, and the left auxiliary pressure plate and the right auxiliary pressure plate are screwed together with the two sides of the stud bolt respectively; the right end of the slide rail is fixedly connected to the left end of the support block 1, and the front end of the support block 2 is fixedly connected to the right end of the support block 1 at a right angle; a magnetic strip is embedded on the left side and top of the rear of the support block 2; a mounting groove is provided on the lower part of the side block, and the support block 2 is inserted into the mounting groove and connected to the side block and the base through the magnetic strip.

2. The quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools according to claim 1, characterized in that: A plurality of compression pieces arranged in parallel in the horizontal direction are provided on the left side of the layered compression block.

3. The quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools according to claim 2, characterized in that: The number of the compression plates is 8-10, and the compression plates are hollow structures with a deformation of 0.2 mm to meet the positioning error requirements between blades.

4. The quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools according to claim 1, characterized in that: An angular limit pin is provided on the front side of the base, and an oblong positioning hole is provided on the lower part of the rear-pull type pressing plate. The rear-pull type pressing plate is sleeved on the angular limit pin through the oblong positioning hole to ensure the pressing direction.

5. The quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools according to claim 1, characterized in that: Two parallel clamping forks are provided on the upper part of the rear-pull pressure plate. The outside of the clamping fork is provided with flexible rubber in an integral rubber-wrapped manner, and its deformation is 0.2mm to meet the positioning error requirements between the blades.

6. The quick-install fixture for group clamping of stator blades without mounting plate for wire-cutting machine tools according to claim 1, characterized in that: The left auxiliary pressing plate and the right auxiliary pressing plate are provided with contoured pressing surfaces, on which foam glue is affixed.

Images