Clamping device for finish-milling blade profile of two-stage blisk

Abstract

The utility model provides a clamping device for finish-milling blade profiles of a two-stage blisk, which comprises a base used for bearing the two-stage blisk to be processed; the mandrel is arranged in the center of the base and serves as a supporting shaft of the two-stage blisk to be machined; the upper positioning assembly is connected to the upper part of the core shaft, protrudes outwards and supports and fixes an upper-stage blisk of the two-stage blisk to be machined from inside to outside; the lower positioning assembly is connected to the lower portion of the mandrel, protrudes outwards and supports and fixes the lower-stage blisk of the two-stage blisk to be machined from inside to outside. The problems that a two-stage blisk milling system is poor in rigidity and blisk parts move or deform in the machining process are solved, and the machining efficiency of the blisk parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation engine mechanical processing, in particular to a clamping device for precision milling blade profiles of a double-stage integral blade disk. Background Art

[0002] The integral blisk is a new type of structural component designed to meet the needs of high-performance aircraft engines. It integrates the engine rotor blades and the wheel disc, eliminating the tenons, mortise and tenon grooves and locking devices in traditional connections, reducing the structural weight and the number of parts, avoiding tenon airflow losses, improving aerodynamic efficiency, and greatly simplifying the engine structure. It has now been widely used in military and civil aircraft engines in various countries.

[0003] The integral blade disk is a key component of an aircraft engine. The rapid development of the engine requires that the aircraft blade disk has higher strength and lighter weight. Therefore, a new type of integrated double-stage integral blade disk with a new structure was designed for the first time in China, and a double-stage integral blade disk containing two stages of integral blade disks was processed from a forging. Due to the complex structure, thin wall, high precision requirements, and large material removal rate of the integrated double-stage integral blade disk of the new structure, it is difficult to clamp and position it during milling, and it is easy to move or deform during the processing. At present, there is no mature processing technology and method in China.

[0004] Due to the complex structure, thin wall, small space, high precision requirement and large material removal rate of the new integrated double-stage integral blade disk designed for the first time in China, if the original single-stage integral blade disk milling and clamping positioning solution is continued to be used, the parts will be prone to movement or deformation during processing due to poor rigidity, and the parts processing efficiency will be low.

[0005] In view of this, the inventor of the present application has designed a clamping device for precision milling of blade profiles of a two-stage integral blade disk in order to overcome the above-mentioned technical problems. Utility Model Content

[0006] The technical problem to be solved by the utility model is to overcome the defects of the prior art of the two-stage integral blade disk, such as complex structure, thin wall, high precision requirement, large material removal rate, difficulty in clamping and positioning during milling, and easy movement or deformation during processing, and to provide a clamping device for the precision milling blade shape of the two-stage integral blade disk.

[0007] The utility model solves the above technical problems through the following technical solutions:

[0008] The utility model provides a clamping device for fine milling blades of a two-stage integral blade disk, which is characterized in that the clamping device comprises: a base, used to carry the two-stage integral blade disk to be processed; a core shaft, arranged at the center of the base, serving as a supporting shaft of the two-stage integral blade disk to be processed; an upper positioning component, connected to the upper part of the core shaft, protruding outward, supporting and fixing the upper blade disk of the two-stage integral blade disk to be processed from the inside to the outside; a lower positioning component, connected to the lower part of the core shaft, protruding outward, supporting and fixing the lower blade disk of the two-stage integral blade disk to be processed from the inside to the outside.

[0009] According to one embodiment of the utility model, the lower positioning assembly includes: a lower positioning disk and at least two pushing pins; the lower positioning disk is sleeved outside the core shaft and is located at the lower part of the core shaft, and a first through hole is provided on the outer periphery of the lower positioning disk; the two pushing pins are symmetrically arranged along the circumferential direction in the lower positioning disk, and the pushing pins pass through the first through hole to press against the lower blade disk of the double-stage integral blade disk to be processed from the inside to the outside.

[0010] According to one embodiment of the utility model, the lower positioning assembly also includes: at least two elastic members, a tensioning block and a thrust rod; the elastic members are symmetrically arranged along the circumferential direction in the lower positioning disk, the elastic members are wrapped around the outside of the pushing column, one end of the elastic member is fixed to the pushing column, and the other end of the elastic member is fixed to the inner surface of the lower positioning disk; the tensioning block is arranged inside the core shaft, the tensioning block is fixed to the bottom of the thrust rod, the outer peripheral surface of the tensioning block is a conical surface, the outer peripheral surface of the tensioning block is against one end of the pushing column, and the other end of the pushing column passes through the first through hole; the thrust rod is arranged inside the core shaft together with the tensioning block.

[0011] According to one embodiment of the utility model, the upper positioning assembly includes: an upper positioning disk, a first cover plate and a fastener; the upper positioning disk is sleeved outside the core shaft and is located on the upper part of the core shaft, and the bottom of the upper positioning disk has a flange radially outward; the first cover plate is arranged on the upper end surface of the upper positioning disk, and the first cover plate cooperates with the flange to fix the upper blade disk of the two-stage integral blade disk to be processed; the fastener fixes the upper positioning disk and the first cover plate.

[0012] According to an embodiment of the utility model, the core shaft is provided with a second through hole along the axial direction, and the tension block and the thrust rod are arranged inside the second through hole.

[0013] According to an embodiment of the present utility model, the diameter of the lower portion of the second through hole is greater than the diameter of the upper portion of the second through hole, and the tension block and the thrust rod are arranged at the lower portion of the second through hole.

[0014] According to an embodiment of the utility model, a step screw is arranged on the top of the thrust rod, and the step screw has an external thread; and the upper part of the second through hole has an internal thread.

[0015] According to an embodiment of the utility model, a second cover plate and a nut are movably connected to the step screw, and the nut is located on the upper part of the second cover plate.

[0016] According to an embodiment of the utility model, the upper surface of the base has a positioning pin.

[0017] According to an embodiment of the present invention, the side surface of the base has an angular calibration surface.

[0018] The positive and progressive effects of the utility model are:

[0019] The clamping device for fine milling blade profile of the double-stage integral blade disk of the utility model has at least the following advantages:

[0020] The utility model solves the problem of poor rigidity of the new structure integrated two-stage integral blade disc milling system and the movement or deformation of blade disc parts during machining by means of adaptive tensioning, over-positioning and other structural methods, and improves the machining efficiency of blade disc parts. The utility model can be used for multiple machining procedures at the same time, and the utility model has a clever design, simple operation and very high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0022] Figure 1 It is a schematic diagram of a clamping device for precision milling blade profile of a two-stage integral blade disk of the utility model.

[0023] Figure 2 It is a schematic diagram of the preparation state of the clamping device for precision milling blades of the double-stage integral blade disk of the utility model before clamping parts.

[0024] Figure 3 It is a schematic diagram of the adaptive tensioning structure in the clamping device for the precision-milled blade profile of a two-stage integral blade disk of the utility model.

[0025] [Reference Signs]

[0026] Base 100

[0027] Positioning pin 110

[0028] Angular calibration surface 120

[0029] Mandrel 200

[0030] The second through hole 210

[0031] Upper positioning assembly 300

[0032] Upper positioning plate 310

[0033] First cover plate 320

[0034] Fastener 330

[0035] Lower positioning assembly 400

[0036] Lower positioning plate 410

[0037] First through hole 411

[0038] Push column 420

[0039] Elastic member 430

[0040] Tension block 440

[0041] Thrust rod 450

[0042] Step screw 451

[0043] Second cover plate 452

[0044] Nut 453

[0045] Double-stage blisk 500

[0046] Upper blade disk 510

[0047] Lower blade disk 520 DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0049] Embodiments of the utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the utility model, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the utility model are selected from well-known and commonly used terms, some of the terms mentioned in the utility model specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the utility model not only by the actual terms used, but also by the meaning implied by each term.

[0050] like Figure 1 to Figure 3 As shown, the utility model provides a clamping device for fine milling blade profile of a two-stage integral blade disk, comprising:

[0051] The base 100 is used to carry the double-stage integral blade disk 500 to be processed.

[0052] The core shaft 200 is arranged at the center of the base 100 and serves as a supporting shaft for the double-stage integral blade disk 500 to be processed.

[0053] The upper positioning assembly 300 is connected to the upper portion of the core shaft 200 and protrudes outwards, supporting and fixing the upper blade disk 510 of the double-stage integral blade disk 500 to be processed from the inside to the outside.

[0054] The lower positioning assembly 400 is connected to the lower portion of the core shaft 200 and protrudes outwards, supporting and fixing the lower blade disk 520 of the double-stage integral blade disk 500 to be processed from the inside to the outside.

[0055] The utility model provides a clamping device which can improve the poor rigidity of a novel structure-integrated two-stage integral blade disc milling system and solve the problem of movement or deformation of blade disc parts during machining.

[0056] like Figure 1 to Figure 3 As shown, as a preferred embodiment of the clamping device for precision milling blade profile of the double-stage integral blade disk of the utility model, the lower positioning assembly 400 includes: a lower positioning disk 410 and at least two pushing posts 420.

[0057] The lower positioning plate 410 is sleeved outside the core shaft 200 and is located at the lower part of the core shaft 200 . A first through hole 411 is provided on the outer periphery of the lower positioning plate 410 .

[0058] The two pushing posts 420 are symmetrically arranged along the circumferential direction in the lower positioning disk 410 . The pushing posts 420 pass through the first through holes 411 and press against the lower blade disk 520 of the double-stage integral blade disk 500 to be processed from the inside to the outside.

[0059] like Figure 1 to Figure 3 As shown, as a preferred embodiment of the clamping device for precision milling blade profile of the double-stage integral blisk of the utility model, the lower positioning assembly 400 also includes: at least two elastic members 430 , a tensioning block 440 and a thrust rod 450 .

[0060] The elastic member 430 is symmetrically arranged along the circumferential direction in the lower positioning plate 410 , and is wrapped around the pushing column 420 . One end of the elastic member 430 is fixed to the pushing column 420 , and the other end of the elastic member 430 is fixed to the inner surface of the lower positioning plate 410 .

[0061] The tensioning block 440 is disposed inside the core shaft 200 and is fixed to the bottom of the thrust rod 450 . The outer peripheral surface of the tensioning block 440 is a conical surface. The outer peripheral surface of the tensioning block 440 abuts against one end of the pushing column 420 , and the other end of the pushing column 420 passes through the first through hole 411 .

[0062] The thrust rod 450 is disposed together with the tension block 440 inside the core shaft 200 .

[0063] The lower positioning plate 410, the pushing column 420, the elastic member 430, the tensioning block 440 and the thrust rod 450 in the clamping device for fine milling blades of the double-stage integral blade disk of the utility model form an adaptive tensioning device.

[0064] Preferably, the thrust rod 450 is connected to the mandrel 200 by threaded engagement; when the two-stage integral blade disk 500 to be processed is mounted on the clamping device of the utility model, the thrust rod 450 can be rotated to drive the tension block 440 to move up and down. While the tension block 440 moves up and down, the conical surface of its outer circumference drives the tension column 420 to move in the horizontal direction, fixes the lower blade disk 520 of the two-stage integral blade disk 500 to be processed, and realizes the function of adaptive tensioning of the blade disk.

[0065] Preferably, the elastic member 430 is a spring; when the tension block 440 moves upward, the pushing column 420 realizes the function of automatic contraction under the tension of the spring serving as the elastic member 430 .

[0066] The adaptive tensioning mechanism is cleverly designed and flexible and convenient to use. It can effectively position and tighten the blade discs of different diameters, increase the rigidity of the blade disc, and solve the problem of movement or deformation of the original blade disc during processing.

[0067] like Figure 1 to Figure 3 As shown, as a preferred embodiment of the clamping device for precision milling blades of the double-stage integral blade disk of the utility model, the upper positioning assembly 300 includes: an upper positioning disk 310, a first cover plate 320 and a fastener 330;

[0068] The upper positioning plate 310 is sleeved outside the core shaft 200 and is located on the upper part of the core shaft 200 . The bottom of the upper positioning plate 310 has a flange extending radially outward.

[0069] The first cover plate 320 is disposed on the upper end surface of the upper positioning plate 310 , and the first cover plate 320 cooperates with the flange to fix the upper blade disk 510 of the double-stage integral blade disk 500 to be processed.

[0070] The fastener 330 fixes the upper positioning plate 310 and the first cover plate 320 .

[0071] Preferably, the fastener 330 is a screw; the screw passes through the first cover plate 320 and the upper positioning disk 310 at the same time, thereby fixing the upper blade disk 510 of the double-stage integral blade disk 500 to be processed.

[0072] like Figure 1As shown, as a preferred embodiment of the clamping device for precision milling blades of the double-stage integral blade disk of the utility model, the core shaft 200 is axially provided with a second through hole 210 , and the tensioning block 440 and the thrust rod 450 are arranged inside the second through hole 210 .

[0073] like Figure 1 As shown, as a preferred embodiment of the clamping device for the precision milling blade of the double-stage integral blade disk of the utility model, the diameter of the lower part of the second through hole 210 is larger than the diameter of the upper part of the second through hole 210, and the tensioning block 440 and the thrust rod 450 are arranged in the lower part of the second through hole 210.

[0074] The diameter of the lower portion of the second through hole 210 is greater than the diameter of the upper portion of the second through hole 210 , so that the lower portion of the second through hole 210 has a space for accommodating the tension block 440 .

[0075] like Figure 1 As shown, as a preferred embodiment of the clamping device for precision milling blades of the double-stage integral blisk of the utility model, a step screw 451 is arranged on the top of the thrust rod 450, and the step screw 451 has an external thread; the upper part of the second through hole 210 has an internal thread.

[0076] The external thread of the step screw 451 cooperates with the internal thread of the upper portion of the second through hole 210 to fix the thrust rod 450 .

[0077] like Figure 1 As shown, as a preferred embodiment of the clamping device for precision milling blades of the double-stage integral blisk of the utility model, a second cover plate 452 and a nut 453 are movably connected to the step screw 451 , and the nut 453 is located on the upper part of the second cover plate 452 .

[0078] After the two-stage integral blade disk 500 to be processed is pressed by the second cover plate 452 , the second cover plate 452 and the blade disk are fixed by tightening the nut 453 , thereby completing the clamping of the blade disk.

[0079] like Figure 2 As shown, as a preferred embodiment of the clamping device for precision milling blades of a two-stage integral blade disk of the utility model, the upper surface of the base 100 has a positioning pin 110 .

[0080] Place the two-stage integral blade disk 500 to be processed on the clamping device for precision milling blades of the two-stage integral blade disk of the utility model, and ensure that the positioning holes on the installation edge of the blade disk should be fully matched with the positioning pins 110 on the base 100, that is, the angular position of the blade disk and the machine tool can be ensured to be correct.

[0081] like Figure 2 As shown, as a preferred embodiment of the clamping device for precision milling blade profile of a two-stage integral blade disk of the utility model, the side surface of the base 100 has an angular calibration surface 120 .

[0082] The angular calibration surface 120 is used to assist in adjusting the position of the clamping device. The angular calibration surface 120 on the base 100 can be adjusted to be parallel to the X-axis or Y-axis on the working surface of the machine tool through a dial indicator.

[0083] The utility model discloses a clamping device for precision milling blades of a double-stage integral blade disc, which can clamp double-stage integral blade discs with complex structures, thin walls, narrow spaces and high precision requirements. Through structures such as the base 100, the positioning pin 110, the pushing column 420, the upper positioning disc 310, the first cover plate 320, the second cover plate 452, etc., the double-stage integral blade disc can be fully positioned, supported, adaptively tightened and pressed in seven directions, which can effectively increase the rigidity of the blade disc processing system and solve the problem of movement or deformation during the blade disc processing.

[0084] The clamping device for fine milling blades of the double-stage integral blade disk of the utility model realizes the function of adaptive tightening of the blade disk through the adaptive tightening device composed of the lower positioning plate 410, the pushing column 420, the elastic member 430, the tightening block 440 and the thrust rod 450. The adaptive tightening mechanism is cleverly designed and flexible and convenient to use. It can effectively position and tighten parts of different diameters, increase the rigidity of the parts, and solve the problem of movement or deformation of the original parts during processing.

[0085] The clamping device for fine milling of blade profile of a two-stage integral impeller provided by the utility model is also a composite tooling. When the first cover plate 320, the fastener 330, the thrust rod 450, the step screw 451, the nut 453 and the large cover plate are not installed, it can be used as a tooling for fine turning or drilling and milling of edges at the upper end, which can effectively reduce the number of tooling and manufacturing costs in the manufacturing process.

[0086] The utility model provides a clamping device for fine-milling blades of a double-stage integral blade disk, wherein the base 100 and other tensioning and pressing devices are connected by screws and threads, and positioning plates, cover plates, pins, etc. of different specifications can be designed for different parts, thereby realizing modularization of the tooling; at the same time, when a part of a clamping device is damaged, it can also be quickly disassembled and replaced without scrapping the entire clamping device, thereby effectively improving the versatility of the tooling, shortening the preparation period of the tooling, and reducing the processing cost.

[0087] A preferred embodiment of the clamping device for fine milling blades of a two-stage integral blade disk of the utility model, the detailed steps for clamping the two-stage integral blade disk to be processed are as follows:

[0088] 1. Before clamping the blade disk, the base 100, the mandrel 200, the lower positioning plate 410, the elastic member 430, the push column 420, the tension block 440, the upper positioning plate 310 and the thrust rod 450 of the clamping device of the double-stage integral blade disk precision milling blade of the utility model should be assembled and installed on the machine tool workbench, and the thrust rod 450 should be adjusted to the uppermost position to ensure that the push column 420 is in the lower positioning plate 410. Figure 2 At the same time, the angular calibration surface 120 of the base 100 is adjusted to be parallel to the X-axis or Y-axis on the working surface of the machine tool by using a dial indicator.

[0089] 2. Install the double-stage integral blade disk 500 as Figure 1 As shown, it is placed on the clamping device of the present invention, and it is ensured that the positioning holes on the mounting edge of the double-stage integral blade disk 500 are fully matched with the positioning pins 110 on the base 100, that is, the angular position of the double-stage integral blade disk 500 and the machine tool is ensured to be correct.

[0090] 3. The thrust rod 450 is adjusted by rotation or other means to drive the tension block 440 to move up and down; while the tension block moves up and down, the outer conical surface of the tension column 420 is used to drive the tension column 420 to move in the horizontal direction, thereby realizing the function of adaptive tensioning of the double-stage integral blade disk 500.

[0091] 4. Install the first cover plate 320 to Figure 1 The double-stage blisk 500 is positioned as shown and compressed by tightening the screws serving as the fasteners 330 .

[0092] 5. Install the step screw 451 as Figure 1 As shown, install it on the mandrel 200, and then install the second cover plate 452 and the nut 453 as shown. Figure 1 As shown, it is installed on the step screw 451, and finally the two-stage integral blade disk 500 is compressed by tightening the nut 453 to complete the clamping of the two-stage integral blade disk 500.

[0093] In summary, the clamping device for precision milling of blades of a two-stage integral blade disc of the utility model solves the problems of poor rigidity of the milling system of the new structure one-piece two-stage integral blade disc, movement or deformation of blade disc parts during machining, through adaptive tensioning, over-positioning and other structural methods, thereby improving the machining efficiency of blade disc parts.

[0094] Moreover, the utility model can be used for multiple processing procedures at the same time. The utility model is cleverly designed, simple to operate, and has very high application value. For similar products, only some components need to be replaced to complete the clamping of other blade disk parts, which can effectively improve the versatility of tooling, shorten the preparation period of tooling, and reduce processing costs.

[0095] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.

Claims

1. A clamping device for fine milling blades of a two-stage integral blade disk, characterized in that: The clamping device comprises: A base, used to carry the double-stage blisk to be processed; A mandrel, arranged at the center of the base, serving as a supporting shaft for the double-stage integral blade disk to be processed; An upper positioning assembly is connected to the upper portion of the mandrel, protrudes outward, and supports and fixes the upper blade of the double-stage integral blade to be processed from the inside to the outside; The lower positioning assembly is connected to the lower part of the core shaft, protrudes outward, and supports and fixes the lower blade disk of the double-stage integral blade disk to be processed from the inside to the outside.

2. The clamping device for fine milling blade profile of a two-stage integral blade disk according to claim 1, characterized in that: The lower positioning assembly comprises: a lower positioning plate and at least two pushing posts; The lower positioning plate is sleeved outside the core shaft and is located at the lower part of the core shaft. The outer periphery of the lower positioning plate is provided with a first through hole; The two pushing posts are symmetrically arranged in the circumferential direction in the lower positioning disk. The pushing posts pass through the first through hole and press against the lower blade disk of the double-stage integral blade disk to be processed from the inside to the outside.

3. The clamping device for fine milling blade profile of a two-stage integral blade disk according to claim 2, characterized in that: The lower positioning assembly also includes: at least two elastic members, a tension block and a thrust rod; The elastic member is symmetrically arranged in the circumferential direction in the lower positioning plate, the elastic member is wrapped outside the pushing column, one end of the elastic member is fixed to the pushing column, and the other end of the elastic member is fixed to the inner surface of the lower positioning plate; The tension block is arranged inside the core shaft, the tension block is fixed to the bottom of the thrust rod, the outer circumference of the tension block is a conical surface, the outer circumference of the tension block abuts against one end of the pushing column, and the other end of the pushing column passes through the first through hole; The thrust rod and the tension block are arranged together inside the core shaft.

4. The clamping device for fine milling blade profile of a two-stage blisk as claimed in claim 1, characterized in that: The upper positioning assembly comprises: an upper positioning plate, a first cover plate and a fastener; The upper positioning plate is sleeved outside the core shaft and is located on the upper part of the core shaft. The bottom of the upper positioning plate has a flange facing outward in the radial direction. The first cover plate is arranged on the upper end surface of the upper positioning plate, and the first cover plate cooperates with the flange to fix the upper blade disk of the double-stage integral blade disk to be processed; The fastener fixes the upper positioning plate and the first cover plate.

5. The clamping device for precision milling blade profile of a two-stage blisk as claimed in claim 3, characterized in that: The core shaft is provided with a second through hole along the axial direction, and the tension block and the thrust rod are arranged inside the second through hole.

6. The clamping device for precision milling blade profile of a two-stage blisk as claimed in claim 5, characterized in that: The diameter of the lower portion of the second through hole is greater than the diameter of the upper portion of the second through hole, and the tension block and the thrust rod are arranged at the lower portion of the second through hole.

7. The clamping device for fine milling blade profile of a two-stage blisk as claimed in claim 5, characterized in that: A step screw is arranged on the top of the thrust rod, and the step screw has an external thread; and an upper portion of the second through hole has an internal thread.

8. The clamping device for fine milling blade profile of a two-stage integral blade disk according to claim 7, characterized in that: A second cover plate and a nut are movably connected to the step screw, and the nut is located on the upper part of the second cover plate.

9. The clamping device for precision milling blade profile of a two-stage blisk as claimed in claim 1, characterized in that: The upper surface of the base is provided with a positioning pin.

10. The clamping device for precision milling blade profile of a double-stage blisk as claimed in claim 1, characterized in that: The side surface of the base has an angle alignment surface.

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