CN112091657B - Clamp for machining blade shroud of engine blade and machining method of engine blade - Google Patents
Clamp for machining blade shroud of engine blade and machining method of engine blade Download PDFInfo
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- CN112091657B CN112091657B CN202010980458.3A CN202010980458A CN112091657B CN 112091657 B CN112091657 B CN 112091657B CN 202010980458 A CN202010980458 A CN 202010980458A CN 112091657 B CN112091657 B CN 112091657B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/16—Working surfaces curved in two directions
- B23C3/18—Working surfaces curved in two directions for shaping screw-propellers, turbine blades, or impellers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
Abstract
The invention discloses a clamp for machining a blade shroud of an engine blade and a machining method of the engine blade, and belongs to the technical field of aero-engines. The utility model provides an engine blade's anchor clamps are used in leaf crown processing, including relative first supporting shoe and the second supporting shoe that sets up, first supporting shoe and second supporting shoe carry on spacingly to the position that blade body is close to the blade leaf crown jointly, replace original top through "pseudo-top" and carry out the centre gripping to the blade, it is fixed, the distance that the blade crown is from "pseudo-top" is less, the blade leaf crown mills rigidity good, reduced and brought the influence owing to cutter relieving and vibration, avoided simultaneously the blade leaf crown to lead to the blade to be extruded through top axial positioning and produce the part and warp and the problem on skew location surface, the blade leaf crown has the uniformity at processing and measuring technical target, the detection precision has been improved, the processingquality of blade leaf crown has been guaranteed in the reverse direction.
Description
Technical Field
The invention relates to the technical field of aero-engines, in particular to a clamp for machining a blade shroud of an engine blade and a machining method of the engine blade.
Background
In order to meet the requirements of high power and high efficiency of a new generation of aero-engine, the blade is used as a core part, the structure of the aero-engine is a breakthrough innovation in structure compared with the structure of the prior old model, and compared with the prior blade, the structure of the aero-engine is relatively complex and the technical requirements are relatively higher.
When processing the blade shroud, have that the structure is complicated, the blade rigidity is poor, cold processing is out of shape big, the many and technical condition of associated size require high characteristics to when carrying out blade shroud and add man-hour, centre gripping blade tenon and use the tenon as main positioning benchmark, withstand the blade shroud through top, fix through the mode that both ends are pressed from both sides tightly, thereby make the blade shroud have following technical defect in the course of working:
1) the milling cutter relieving and vibrating problems exist due to poor milling rigidity of the blade, and particularly when the allowance is small, the milling cutter relieving problem can directly damage the surface integrity of the part;
2) the problem that the blade is extruded to generate part deformation and offset positioning surface in the machining process of the part;
3) when the blade shroud is processed, two ends of the blade are clamped, and when the blade shroud is measured, the blade shroud is in a free state, and the technical targets of the blade shroud and the blade shroud are inconsistent.
Disclosure of Invention
The invention aims to provide a clamp for processing a blade shroud of an engine blade and a processing method of the engine blade, and aims to solve the problem that the quality of the conventional blade shroud after processing cannot be guaranteed.
The technical scheme for solving the technical problems is as follows:
a fixture for machining a shroud of an engine blade includes: the first supporting block and the second supporting block are arranged on the machine tool positioning disc, the first supporting block and the second supporting block are oppositely arranged on two sides of a clamping jaw on the machine tool positioning disc, and both the first supporting block and the second supporting block comprise a connecting end connected with the machine tool positioning disc and a positioning end far away from the machine tool positioning disc;
the positioning end of the first supporting block is connected with a first positioning component and a second positioning component which are matched with the position, close to the blade shroud, of the convex surface of the blade body, and the first positioning component and the second positioning component respectively penetrate through the positioning end of the first supporting block and face the direction of the positioning end of the second supporting block;
the positioning end of the second supporting block is connected with a third positioning component and a fourth positioning component which are matched with the position, close to the blade shroud, of the concave surface of the blade body, and the third positioning component and the fourth positioning component respectively penetrate through the positioning end of the second supporting block and face the direction of the positioning end of the first supporting block;
the first positioning assembly, the second positioning assembly, the third positioning assembly and the fourth positioning assembly are located on the same plane, the extending direction of the first positioning assembly is crossed with the extending direction of the second positioning assembly, and the extending directions of the third positioning assembly and the fourth positioning assembly are crossed.
When the blade shroud is machined, the original clamping jaws on the positioning disc of the machine tool are used for clamping the blade tenon, the machined tenon is used as a main positioning reference, the concave surface of the blade body of the blade is limited by the first positioning assembly and the second positioning assembly, the convex surface of the blade body of the blade is limited by the third positioning assembly and the fourth positioning assembly, the position of the blade body close to the blade shroud is limited by the four positioning assemblies together, namely the four positioning assemblies form a 'pseudo tip', the position of the blade body close to the blade shroud is limited by the 'pseudo tip', when the blade shroud is machined, the distance from the blade shroud to the 'pseudo tip' is smaller, the milling rigidity of the blade shroud is good, the influence caused by cutter relieving and vibration is reduced, and the problems that the blade is extruded to generate part deformation and the positioning surface is deviated due to axial positioning of the blade shroud are avoided, the blade shroud is in a free state during machining, the blade shroud is also in a free state during measurement, technical targets of the blade shroud and the blade shroud are consistent, detection accuracy is improved, and machining quality of the blade shroud is reversely guaranteed.
In addition, because the blade can rotate under the drive of a machine tool, the original clamping mode is that the clamping jaws on the positioning disc of the machine tool drive the blade to rotate, and at the moment, the blade body of the blade is easy to twist or vibrate.
Furthermore, the first positioning assembly, the second positioning assembly, the third positioning assembly and the fourth positioning assembly respectively comprise a first adjusting screw and a first ejector pin which extend in the same direction;
the tail part of the first adjusting screw extends into the corresponding supporting block and is in threaded connection with the corresponding supporting block;
the first ejector pin is in sliding fit with the corresponding supporting block, one end of the first ejector pin extends into the corresponding supporting block and is in contact with the tail part of the first adjusting screw, and the other end of the first ejector pin is located in a gap between the first supporting block and the second supporting block.
According to the invention, each positioning assembly is adjusted through the first adjusting screw and the first pin and limits the blade body of the blade, the first adjusting screw is screwed to drive the first pin to slide in the corresponding supporting block, the first ejector pin is tightly contacted with the blade body of the blade through the first adjusting screw, and meanwhile, the blade blank can be adjusted in a floating manner through adjustment of the positioning assemblies on two sides of the blade body, so that the adjustment is convenient and fast, the position of the blade blank is more accurate, and the processing requirement is met.
Furthermore, the side wall of the first ejector pin is provided with a limiting pin, the first supporting block and the second supporting block are respectively provided with a strip-shaped hole matched with the limiting pin, and the extending direction of the strip-shaped hole is consistent with the extending direction of the first ejector pin.
The limiting pin is limited through the strip-shaped hole, so that the first ejector pin cannot slide out of the corresponding supporting block, the loss of parts is avoided, the clamping efficiency can be improved, and the deformation caused by excessive clamping of the first ejector pin on the blade body of the blade is avoided.
Furthermore, the positioning ends of the first supporting block and the second supporting block are respectively provided with a second ejector pin matched with the back side of the blade shroud.
The second ejector pin limits the back side of the blade shroud, namely the extending direction of the blade, so that the blade body is prevented from bending or vibrating, and the blade body and each positioning assembly cannot slide.
Furthermore, the positioning ends of the first supporting block and the second supporting block are respectively connected with first limiting screws through threads, and the tail parts of the first limiting screws extend into the corresponding supporting blocks and are in contact with the corresponding second ejector pins.
After the first limiting screw is screwed into the corresponding supporting block, the second ejector pin is extruded, and the second ejector pin is prevented from loosening.
Furthermore, the blade also comprises a fifth positioning component and a sixth positioning component which are respectively matched with two edges of the blade body; the fifth positioning component and the sixth positioning component are respectively arranged on two sides of a gap between the first supporting block and the second supporting block.
The fifth positioning assembly and the sixth positioning assembly are used for limiting two edges of the blade body of the blade, and the blade body and the positioning assemblies are prevented from sliding.
Furthermore, the fifth positioning assembly and the sixth positioning assembly respectively comprise a connecting block, a second adjusting screw and a third ejector pin;
two ends of the connecting block are respectively connected with the first supporting block and the second supporting block;
the second adjusting screw is in threaded connection with the connecting block, and the tail of the second adjusting screw is T-shaped and extends into the connecting block;
the extending direction of the third ejector pin is consistent with the extending direction of the second adjusting screw, the third ejector pin is in sliding fit with the connecting block, one end of the third ejector pin extends into the connecting block and is provided with a T-shaped hole matched with the tail of the second adjusting screw, and the other end of the third ejector pin is located in a gap between the first supporting block and the second supporting block.
According to the blade body clamping device, the fifth positioning assembly and the sixth positioning assembly are adjusted through the second adjusting screw and the third ejector pin and limit the edge of the blade body, the third ejector pin can be driven to slide in the connecting block by screwing the second adjusting screw, the third ejector pin is in close contact with the edge of the blade body through the second adjusting screw, and meanwhile, the second adjusting screw and the third ejector pin are connected through the matching between the T-shaped tail and the T-shaped hole, so that the third ejector pin cannot be separated from the second adjusting screw, the loss of parts is avoided, and the clamping efficiency can be improved.
A processing method of the engine blade based on the engine blade tip shroud processing clamp comprises the following steps:
s1: clamping a blade blank and processing a blade tenon;
s2: taking a blade tenon as a main positioning reference, fixing the blade tenon by adopting a clamping jaw on a positioning disc of a machine tool, propping a blade shroud of the blade by a top point of the machine tool, and then processing a blade body of the blade;
s3: carrying out vacuum heat treatment on the blade blank;
s4: the blade shroud machining fixture for the engine blade is mounted on a machine tool positioning disc, a clamping jaw on the machine tool positioning disc is used for fixing a blade tenon, the position, close to a blade shroud, of a blade body is clamped by the fixture, and then the blade shroud is machined.
According to the processing method of the engine blade, the four positioning assemblies are adopted to replace the original tip to limit the position of the blade body close to the blade shroud, the position of the blade can be changed in a floating adjustment mode, the final position of the blade is accurate, the processing precision is ensured, meanwhile, the double-drive processing mode has a protection effect on the weaker blade body, and the blade body is not easy to twist or vibrate. In addition, the vacuum heat treatment is only carried out after the tenon and the blade are machined to remove the early machining heat stress and the release of the mechanical cold stress, compared with the original at least three times of intermediate aging heat treatment, the heat treatment times are greatly reduced, and the production efficiency is obviously improved.
Further, in step S4, a specific manner of clamping the position of the blade body close to the blade shroud by the clamp is adopted: and the first positioning assembly and the second positioning assembly are in contact with the position, close to the blade shroud, of the convex surface of the blade body, and the third positioning assembly and the fourth positioning assembly are in contact with the position, close to the blade shroud, of the concave surface of the blade body.
Further, in the step S4, the position of the blade blank is adjusted by using the dial indicator to align and adjusting the first positioning component, the second positioning component, the third positioning component and the fourth positioning component.
The invention has the following beneficial effects:
(1) when the blade shroud is machined, the false center replaces the original center to clamp and fix the blade, the distance between the blade shroud and the false center is smaller, the milling rigidity of the blade shroud is good, the influence caused by cutter relieving and vibration is reduced, the problems that the blade is extruded to generate part deformation and the positioning surface is deviated due to the axial positioning of the blade shroud through the center are solved, the technical targets of machining and measuring of the blade shroud are consistent, the detection precision is improved, and the machining quality of the blade shroud is reversely guaranteed.
(2) When the clamp provided by the invention clamps the blade, the requirement of double-drive processing is met, the blade body of the blade with weak diagonal angle in double-drive processing has a protection effect, the blade body is not easy to twist or vibrate, simultaneously, the blade processing procedure can be obviously shortened, namely, the repair of a tip hole and the repeated heat treatment and repair of a tip process reference plane are reduced, and the production efficiency is obviously improved.
Drawings
FIG. 1 is a schematic structural view of a fixture for machining a shroud of an engine blade according to the present invention mounted on a machine tool;
FIG. 2 is a schematic structural view of a blade shroud machining jig for an engine blade according to the present invention;
FIG. 3 is a schematic structural diagram of a first positioning assembly of the present invention;
FIG. 4 is a schematic structural diagram of a fifth positioning assembly of the present invention;
FIG. 5 is a schematic view of the second adjusting screw of the present invention being connected to a third knock pin;
fig. 6 is a schematic structural diagram of the first positioning assembly, the second positioning assembly, the third positioning assembly and the fourth positioning assembly of the present invention when contacting with the blade blank.
In the figure: 10-a machine tool positioning disc; 11-a jaw; 20-a first support block; 21-a first positioning assembly; 22-a second positioning assembly; 23-a first adjustment screw; 24-a first knock pin; 25-a limit pin; 26-a strip-shaped hole; 27-a second knock pin; 28-a first limit screw; 30-a second support block; 31-a third positioning assembly; 32-a fourth positioning assembly; 40-a fifth positioning assembly; 41-connecting block; 42-a second adjustment screw; 43-a third knock pin; 50-a sixth positioning assembly.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Examples
Anchor clamps are used in blade shroud processing of engine blade includes: the positioning device comprises a first supporting block 20 and a second supporting block 30, wherein the first supporting block 20 and the second supporting block 30 are perpendicular to a machine tool positioning disk 10 and are installed on the machine tool positioning disk 10. The structure of the first supporting block 20 is consistent with that of the second supporting block 30, the first supporting block 20 and the second supporting block 30 are oppositely arranged on two sides of the clamping jaw 11 on the machine tool positioning disk 10, and the first supporting block 20 and the second supporting block 30 respectively comprise a connecting end connected with the machine tool positioning disk 10 through bolts and a positioning end far away from the machine tool positioning disk 10. The positioning end of the first supporting block 20 is used for being matched with the convex surface of the blade body of the blade to limit the convex surface of the blade body, and the positioning end of the second supporting block 30 is used for being matched with the concave surface of the blade body of the blade to limit the concave surface of the blade body of the blade.
The first positioning component 21 and the second positioning component 22 are disposed at the positioning end of the first supporting block 20, and the first positioning component 21 and the second positioning component 22 respectively penetrate through the positioning end of the first supporting block 20 and face the direction of the positioning end of the second supporting block 30. The positioning end of the second supporting block 30 is provided with a third positioning component 31 and a fourth positioning component 32, and the third positioning component 31 and the fourth positioning component 32 respectively pass through the positioning end of the second supporting block 30 and face the direction of the positioning end of the first supporting block 20.
The first positioning assembly 21, the second positioning assembly 22, the third positioning assembly 31 and the fourth positioning assembly 32 are located on the same plane, and the plane is parallel to the machine tool positioning plate 10, namely the plane is located in the transverse direction of the blade blank. The extending directions of the first positioning assembly 21 and the second positioning assembly 22 are crossed, the extending directions of the third positioning assembly 31 and the fourth positioning assembly 32 are crossed, the first positioning assembly 21, the second positioning assembly 22, the third positioning assembly 31 and the fourth positioning assembly 32 are perpendicular to the blade body, the concave surface and the convex surface of the blade body are positioned in at least two directions respectively, the blade body can be effectively fixed, and the position of the blade can be changed by adjusting the first positioning assembly 21, the second positioning assembly 22, the third positioning assembly 31 and the fourth positioning assembly 32, so that the positioning accuracy of the blade is met.
The first positioning assembly 21, the second positioning assembly 22, the third positioning assembly 31 and the fourth positioning assembly 32 each include a first adjusting screw 23 and a first knock pin 24, and the extending directions of the first adjusting screw 23 and the first knock pin 24 are the same. The tail of the first adjusting screw 23 extends into the corresponding support block and the first adjusting screw 23 is threadedly connected with the corresponding support block. One end of the first knock pin 24 is inserted into the corresponding support block and is in contact with the tail of the first adjustment screw 23, and the other end of the first knock pin 24 is located between the first support block 20 and the second support block 30.
In order to ensure that the first ejector pin 24 does not slide out of the corresponding support block and ensure that the first ejector pin 24 does not excessively extrude the blade blank, the side surface of the first ejector pin 24 is provided with a limit pin 25, the side walls of the first support block 20 and the second support block 30 are provided with strip-shaped holes 26 matched with the limit pin 25, and the extending direction of the strip-shaped holes 26 is consistent with the extending direction of the first ejector pin 24. When the first adjusting screw 23 is screwed, the first knock pin 24 slides with the corresponding support block to limit the blade body, and meanwhile, the limit pin 25 also slides in the strip-shaped hole 26 to guide the first knock pin 24.
The positioning ends of the first supporting block 20 and the second supporting block 30 are further provided with a second knock pin 27 and a first limit screw 28 respectively, which are matched with the back side of the blade shroud. The second knock pin 27 extends in a direction perpendicular to the machine tool positioning plate 10, and the second knock pin 27 is screwed with the corresponding support block. The first limit screw 28 is perpendicular to the second knock pin 27, and after the first limit screw 28 is screwed into the corresponding support block, the tail part of the first limit screw is contacted with the second knock pin 27, and the second knock pin 27 is fixed through the extrusion action, so that the second knock pin 27 is prevented from loosening.
Anchor clamps are used in blade shroud processing of engine blade still includes: and the fifth positioning assembly 40 and the sixth positioning assembly 50 are respectively arranged at two sides of the gap between the first supporting block 20 and the second supporting block 30, and are used for being matched with two edges of the blade body of the blade.
The fifth and sixth positioning assemblies 40 and 50 each include a connecting block 41, a second adjusting screw 42, and a third knock pin 43. Both ends of the connection block 41 are connected to the first and second support blocks 20 and 30, respectively. The second adjusting screw 42 is in threaded connection with the connecting block 41, and the tail of the second adjusting screw 42 is T-shaped and extends into the connecting block 41. The extending direction of the third knock pin 43 is consistent with the extending direction of the second adjusting screw 42, the third knock pin 43 extends into the connecting block 41 and is in sliding fit with the connecting block 41, a T-shaped hole is formed in one end, extending into the connecting block 41, of the third knock pin 43, the T-shaped hole is matched with the tail portion of the second adjusting screw 42, and the other end of the third knock pin 43 is located in a gap between the first supporting block 20 and the second supporting block 30. By screwing the second adjusting screw 42, the third knock pin 43 will slide in the connecting block 41 until it comes into contact with the edge of the blade body.
In order to ensure that the first knock pin 24 and the third knock pin 43 only slide and do not rotate, the cross-section of the first knock pin 24 and the third knock pin 43 may be polygonal, elliptical, or the like; the end of the first knock pin 24 contacting the blade body may be spherical or arc-shaped, etc.
The machining method of the engine blade based on the clamp for machining the blade shroud of the engine blade is characterized by comprising the following steps of:
s1: clamping a blade blank and processing a blade tenon;
s2: taking a blade tenon as a main positioning reference, fixing the blade tenon by adopting a clamping jaw 11 on a machine tool positioning disc 10, propping a blade shroud of the blade through a top of a machine tool, and then processing a blade body of the blade;
s3: carrying out vacuum heat treatment on the blade blank;
s4: the fixture is mounted on a machine tool positioning disc 10, a jaw 11 on the machine tool positioning disc 10 is used for fixing a blade tenon, so that a first positioning assembly 21 and a second positioning assembly 22 are in contact with the position, close to a blade shroud, of the convex surface of a blade body, and a third positioning assembly 31 and a fourth positioning assembly 32 are in contact with the position, close to the blade shroud, of the concave surface of the blade body.
S5: respectively installing dial indicators in the X-axis direction and the Y-axis direction of the machine tool, detecting two mutually vertical side surfaces of the blade, and adjusting the position of the blade by adjusting the first positioning assembly 21, the second positioning assembly 22, the third positioning assembly 31 and the fourth positioning assembly 32 to ensure that the axial direction of the blade is overlapped with the Z-axis direction of the machine tool, namely the axial line of the original tip hole of the blade is overlapped with the Z-axis direction of the machine tool;
s6: and (4) processing a blade shroud.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. Anchor clamps are used in blade shroud processing of engine blade, its characterized in that includes: the clamping device comprises a first supporting block (20) and a second supporting block (30) which are installed on a machine tool positioning disc (10), wherein the first supporting block (20) and the second supporting block (30) are oppositely arranged on two sides of a clamping jaw (11) on the machine tool positioning disc (10), and the first supporting block (20) and the second supporting block (30) respectively comprise a connecting end connected with the machine tool positioning disc (10) and a positioning end far away from the machine tool positioning disc (10);
the positioning end of the first supporting block (20) is connected with a first positioning component (21) and a second positioning component (22) which are matched with the position, close to the blade shroud, of the convex surface of the blade body, and the first positioning component (21) and the second positioning component (22) respectively penetrate through the positioning end of the first supporting block (20) and face the direction of the positioning end of the second supporting block (30);
the positioning end of the second supporting block (30) is connected with a third positioning component (31) and a fourth positioning component (32) which are matched with the position, close to the blade shroud, of the concave surface of the blade body, and the third positioning component (31) and the fourth positioning component (32) respectively penetrate through the positioning end of the second supporting block (30) and face the direction of the positioning end of the first supporting block (20);
the first positioning assembly (21), the second positioning assembly (22), the third positioning assembly (31) and the fourth positioning assembly (32) are positioned on the same plane, the extending direction of the first positioning assembly (21) is crossed with the extending direction of the second positioning assembly (22), and the extending direction of the third positioning assembly (31) is crossed with the extending direction of the fourth positioning assembly (32);
the blade further comprises a fifth positioning assembly (40) and a sixth positioning assembly (50) which are matched with two edges of the blade body of the blade respectively; the fifth positioning component (40) and the sixth positioning component (50) are respectively arranged at two sides of a gap between the first supporting block (20) and the second supporting block (30).
2. The clamp for machining the blade shroud of the engine blade according to claim 1, wherein the first positioning assembly (21), the second positioning assembly (22), the third positioning assembly (31) and the fourth positioning assembly (32) each comprise a first adjusting screw (23) and a first knock pin (24) which extend in the same direction;
the tail part of the first adjusting screw (23) extends into the corresponding supporting block and is in threaded connection with the corresponding supporting block;
the first ejector pin (24) is in sliding fit with the corresponding supporting block, one end of the first ejector pin (24) extends into the corresponding supporting block and is in contact with the tail part of the first adjusting screw (23), and the other end of the first ejector pin (24) is located in a gap between the first supporting block (20) and the second supporting block (30).
3. The fixture for machining the blade shroud of the engine blade according to claim 2, wherein a limit pin (25) is provided on a side wall of the first knock pin (24), the first support block (20) and the second support block (30) are respectively provided with a strip-shaped hole (26) which is matched with the limit pin (25), and an extending direction of the strip-shaped hole (26) is consistent with an extending direction of the first knock pin (24).
4. The blade shroud machining jig according to claim 1, characterized in that the positioning ends of the first support block (20) and the second support block (30) are respectively provided with a second knock pin (27) that fits with the back side of the blade shroud.
5. The fixture for machining the shroud of the engine blade as claimed in claim 4, wherein the positioning ends of the first support block (20) and the second support block (30) are further respectively connected with first limit screws (28) through threads, and tail portions of the first limit screws (28) extend into the corresponding support blocks and are in contact with the corresponding second ejector pins (27).
6. The fixture for machining the shroud of the engine blade according to claim 1, wherein the fifth positioning assembly (40) and the sixth positioning assembly (50) each include a connecting block (41), a second adjusting screw (42), and a third knock pin (43);
two ends of the connecting block (41) are respectively connected with the first supporting block (20) and the second supporting block (30);
the second adjusting screw (42) is in threaded connection with the connecting block (41), and the tail of the second adjusting screw (42) is T-shaped and extends into the connecting block (41);
the extending direction of the third ejector pin (43) is consistent with the extending direction of the second adjusting screw (42), the third ejector pin (43) is in sliding fit with the connecting block (41), one end of the third ejector pin (43) extends into the connecting block (41) and is provided with a T-shaped hole matched with the tail part of the second adjusting screw (42), and the other end of the third ejector pin (43) is located in a gap between the first supporting block (20) and the second supporting block (30).
7. A method for machining an engine blade by using the jig for machining a shroud of an engine blade according to any one of claims 1 to 6, comprising the steps of:
s1: clamping a blade blank and processing a blade tenon;
s2: taking a blade tenon as a main positioning reference, fixing the blade tenon by adopting a clamping jaw (11) on a machine tool positioning disc (10), propping against a blade shroud of the blade through a machine tool tip, and then processing a blade body of the blade;
s3: carrying out vacuum heat treatment on the blade blank;
s4: the engine blade tip shroud machining fixture in any one of claims 1 to 6 is mounted on a machine tool positioning disc (10), a blade tenon is fixed by a clamping jaw (11) on the machine tool positioning disc (10), the position of a blade body close to a blade tip shroud is clamped by the fixture, and then the blade tip shroud is machined.
8. The engine blade machining method according to claim 7, wherein in step S4, the specific manner of clamping the position of the blade body close to the blade shroud by the clamp is as follows: the first positioning component (21) and the second positioning component (22) are in contact with the position, close to the blade shroud, of the convex surface of the blade body, and the third positioning component (31) and the fourth positioning component (32) are in contact with the position, close to the blade shroud, of the concave surface of the blade body.
9. The engine blade machining method according to claim 8, wherein in step S4, a dial indicator is used for alignment, and the position of the blade blank is adjusted by adjusting the first positioning assembly (21), the second positioning assembly (22), the third positioning assembly (31) and the fourth positioning assembly (32).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010980458.3A CN112091657B (en) | 2020-09-17 | 2020-09-17 | Clamp for machining blade shroud of engine blade and machining method of engine blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010980458.3A CN112091657B (en) | 2020-09-17 | 2020-09-17 | Clamp for machining blade shroud of engine blade and machining method of engine blade |
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| CN112091657A CN112091657A (en) | 2020-12-18 |
| CN112091657B true CN112091657B (en) | 2021-12-10 |
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| CN110936231A (en) * | 2019-12-17 | 2020-03-31 | 中国航发动力股份有限公司 | System for monitoring dynamic displacement of precision forging blade and monitoring method thereof |
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| DE10355555B4 (en) * | 2003-11-21 | 2012-08-09 | Hainbuch Gmbh Spannende Technik | Clamping jaws and clamping device for clamping workpieces |
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| CN202507097U (en) * | 2012-04-10 | 2012-10-31 | 西北工业大学 | Hydraulic fixture for precisely-forged blade tenon root machining |
| CN104084773A (en) * | 2014-08-04 | 2014-10-08 | 南京赛达机械制造有限公司 | Machining process of axial-flow type turbine blade |
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| CN108423191A (en) * | 2018-02-28 | 2018-08-21 | 上海交通大学 | Blade root processing flexible apparatus |
| CN110614448A (en) * | 2019-08-29 | 2019-12-27 | 江苏大学 | Deformation suppression clamp for laser impact of multiple blades |
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| CN112091657A (en) | 2020-12-18 |
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