CN114888610A - Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage - Google Patents
Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage Download PDFInfo
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- CN114888610A CN114888610A CN202210611289.5A CN202210611289A CN114888610A CN 114888610 A CN114888610 A CN 114888610A CN 202210611289 A CN202210611289 A CN 202210611289A CN 114888610 A CN114888610 A CN 114888610A
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000003754 machining Methods 0.000 title claims description 4
- 230000008569 process Effects 0.000 claims abstract description 39
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 2
- 102220565243 L-lactate dehydrogenase A-like 6A_M11A_mutation Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/02—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass turbine or like blades from one piece
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
A tooth-shaped positioning block for positioning a blade and a clamping and aligning method for processing a blade steam passage relate to the technical field of processing of a turbine blade. The invention aims to solve the problems that in the steam passage processing process of the existing blade, a blade crown thimble hole is not concentric with a machine tool thimble easily due to a clamping and fixing mode, and the blade is deviated due to the clamping of a blade root and the fixing of a blade crown, so that the steam passage profile and the processing position degree of the blade are out of tolerance. The invention relates to a toothed positioning block for clamping a high-temperature alloy blade, which comprises two positioning blocks, wherein a toothed surface is processed on the end surface of one side of each positioning block, the toothed surface is matched with the toothed surface of a blade root part on the blade, a reference block is processed on the end surface of the other side of each positioning block, and the reference block is vertical to the end surface of the other side of each positioning block; the two positioning blocks are arranged oppositely at one side with a tooth-shaped surface. The invention is mainly used for processing the steam passage part of the blade.
Description
Technical Field
The invention relates to the technical field of turbine blade processing, in particular to a tooth-shaped positioning block for blade positioning and a blade steam passage processing, clamping and aligning method.
Background
The moving blade of the M11A unit is made of GH4413 material, and the blade is assembled with a pre-twist angle of 2.5 degrees. Because the material has higher strength and toughness, the traditional tooth-shaped positioning block and the clamping block are adopted to clamp the blade root in the steam passage processing process, and the upper surface and the lower surface of the blade root are tooth-shaped, so that the phenomenon of staggered teeth is easily formed between the tooth-shaped positioning block and the clamping block, and the blade is unstable in clamping. The blade crown is fixed by the aid of the pre-processed thimble holes, the center line of the thimble holes of the blade crown possibly deviates from the center line of the tooth-shaped structure of the blade root, the position of the center line of the thimble holes is not on the rotation center line of a machine tool, the thimble holes of the blade crown and the thimble of the machine tool are not concentric during clamping of the blade, the jacking process is 'stiff', and the clamping of the blade root and the fixing of the blade crown enable the blade to deviate, so that the molded line of a steam passage of the blade and the machining position are out of tolerance.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in the existing blade steam passage processing process, a clamping and fixing mode easily causes the concentricity of a blade crown thimble hole and a machine tool thimble, and the clamping of a blade root and the tight fixing of the blade crown lead the blade to deviate, thus causing the problem of the processing position degree of the blade steam passage profile line being out of tolerance; further provides a tooth-shaped positioning block for positioning the blade and a blade steam passage processing, clamping and aligning method.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a toothed positioning block for clamping a high-temperature alloy blade comprises two positioning blocks, wherein a toothed surface is processed on one side end face of each positioning block and matched with a toothed surface of a blade root part on the blade; the two positioning blocks are arranged oppositely at one side with a tooth-shaped surface.
Furthermore, the tooth-shaped surface is positioned at the upper end of one side end surface of the positioning block.
The reference block is further positioned at the upper end of the end face of the other side of the positioning block and is flush with the upper end face of the positioning block.
A clamping and aligning method for processing a high-temperature alloy blade steam passage comprises the following specific processing steps:
step 3, grinding the back radial direction of the technological clamp handle of the blade and the steam outlet side of the technological clamp handle, and detecting and recording the distance between the back radial direction of the technological clamp handle and the Z axis of the blade and the distance between the steam outlet side of the technological clamp handle and the Z axis of the blade by utilizing three coordinates;
step 4, mounting the two positioning blocks on a jaw part of the machine tool;
step 5, clamping the blade root of the blade between two positioning blocks;
step 6, respectively measuring the distance from the back radial direction of the technological clamp handle of the blade to the rotation center of the machine tool and the distance from the steam outlet side to the rotation center of the machine tool by using a machine tool measuring head, and determining whether the clamping precision of the blade root on the blade is in a required range;
step 7, vertically inserting a thimble of the machine tool into the outer end face of the technological clamp handle of the blade, and clamping the technological clamp handle of the blade by using a hydraulic device of the machine tool;
and 8, processing the steam passage part of the blade.
Furthermore, in the step 4, the two positioning blocks are respectively arranged at the jaw position of the machine tool, the tooth-shaped surfaces of the two positioning blocks are oppositely arranged, the side end surface of the reference block on the upper positioning block is tightly attached to the outer end surface of the upper clamp of the machine tool, and the side end surface of the reference block on the lower positioning block is tightly attached to the outer end surface of the lower clamp of the machine tool.
Compared with the prior art, the invention has the following beneficial effects:
the blade is clamped and positioned by the designed tooth-shaped positioning block, and after clamping and alignment are carried out by the method, the processing precision of the blade is obviously improved, the position degree and the profile degree of a steam passage meet the precision requirement of a drawing of 0.1mm, and the qualification rate of the blade can reach more than 95%.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention to its proper form.
FIG. 1 is a schematic structural view of two positioning blocks of the present invention integrated together;
FIG. 2 is a schematic view of a single positioning block;
FIG. 3 is a schematic structural view of the blade, wherein the line in which Z is located is indicated as the Z-axis of the blade;
FIG. 4 is a clamping view of the combination of a jaw, a tooth-shaped positioning block and a blade on a machine tool;
FIG. 5 is an enlarged view of a portion of FIG. 3 at A;
FIG. 6 is a schematic view of the location of the back radial and steam outlet sides of the bucket process clamp shank.
In the figure: 1-positioning a block: 1-1-dentate surface; 1-2-reference block; 1-3-side end face; 1-4-mounting end faces; 2-a blade; 2-1-blade root; 2-2-technological clamp handles; 2-2-1-dorsal-sagittal; 2-2-2-steam outlet side; 2-2-3-thimble hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, an embodiment of the present application provides a toothed positioning block for clamping a superalloy blade, including two positioning blocks 1 arranged oppositely, a toothed surface 1-1 is processed on an end surface of one side of each positioning block 1, the toothed surface 1-1 is matched with a toothed surface of a blade root 2-1 portion on a blade 2, and the toothed surfaces 1-1 on the two positioning blocks 1 are used for clamping the blade root 2-1 portion of the blade 2; a reference block 1-2 is processed on the end surface of the other side of each positioning block 1, and the reference block 1-2 is vertical to the end surface of the other side of the positioning block 1; one side of the two positioning blocks 1 with the tooth-shaped surface 1-1 is oppositely arranged.
In this embodiment, as shown in fig. 1, the two positioning blocks 1 are integrally processed, the two positioning blocks 1 are processed by a wire-cutting slow-moving method along a tooth-shaped center line of a whole tooth-shaped positioning block, a wire-feeding point is selected on a non-positioning surface, and after the wire-cutting is finished, the tooth block is divided into two along the tooth-shaped center line, so as to obtain the two positioning blocks 1. The length of the two positioning blocks 1 is added with a length positioning reference, namely, the side end surface 1-3 of the reference block 1-2 is used as the length positioning reference, and the two positioning blocks are used for positioning the positioning blocks in the length direction when being connected with a jaw of a machine tool, so that the two positioning blocks can be ensured not to be staggered in the length direction; the end faces of the two positioning blocks 1, which are provided with the reference blocks 1-2, are width positioning references, so that the positioning blocks are not inclined in the width direction, and the consistency and stability of clamping of the blade root 2-1 part of the blade 2 are ensured through improvement of the positioning blocks 1.
In a possible embodiment, the toothed surface 1-1 is located at the upper end of one side end surface of the positioning block 1.
In a possible embodiment, the reference block 1-2 is located at the upper end of the other end face of the positioning block 1 and is flush with the upper end face of the positioning block 1.
The embodiment of the application provides a clamping and aligning method for processing a high-temperature alloy blade steam passage, which comprises the following specific processing steps:
step 3, grinding the back radial direction 2-2-1 of the process clamp handle 2-2 of the blade 2 and the steam outlet side 2-2-2 of the process clamp handle 2-2 to enable the back radial direction 2-2-1 of the process clamp handle 2-2 and the steam outlet side 2-2-2 of the process clamp handle 2-2 to reach a process reference, and detecting and recording the distance between the back radial direction 2-2-1 of the process clamp handle 2-2 and the Z axis of the blade and the distance between the steam outlet side 2-2-2 of the process clamp handle 2-2 and the Z axis of the blade by utilizing three coordinates;
step 4, mounting the two positioning blocks 1 on the jaw part of the machine tool;
step 5, clamping the blade root 2-1 of the blade 2 between the two positioning blocks 1;
step 6, respectively measuring the distance from the back radial direction 2-2-1 of the process clamp handle 2-2 of the blade 2 to the rotation center of the machine tool and the distance from the steam outlet side 2-2-2 to the rotation center of the machine tool by using a machine tool measuring head, and determining whether the clamping precision of the blade root 2-1 on the blade 2 is within a required range; the clamping precision of the blade root part is verified after the blade root is clamped, if the difference value between the process reference of the back radial direction of the process clamp handle and the process reference of the steam outlet side of the process clamp handle is within 0.05mm, the rotating center of a machine tool and the Z axis of the blade can be overlapped after the blade root is clamped, and the clamping precision requirement is met;
step 7, vertically inserting a machine tool thimble into the outer end face of the process clamp handle 2-2 of the blade 2 by 1mm, clamping and positioning the blade shroud without causing deflection of the blade shroud, and clamping the process clamp handle 2-2 of the blade 2 by using a hydraulic device of the machine tool;
and 8, processing the steam passage part of the blade 2.
In the embodiment, before and after the blade 2 is clamped, data of a back radial direction 2-2-1 of the process clamp handle 2-2 and data of a steam outlet side 2-2-2 of the process clamp handle 2-2 are measured through a three-coordinate measuring head and a machine tool measuring head respectively, and then comparison is carried out to ensure the clamping precision of the blade 2.
In the embodiment, the blade root part of the blade 2 is designed by clamping the two positioning blocks 1 and clamping the process clamping handles of the blade crown thimble part, so that the structural center line of the tooth form of the blade root and the center line of the blade crown thimble are not deviated and are positioned on the same center line, and the precision of processing the steam passage part of the blade is ensured.
In a possible embodiment, in the step 4, two positioning blocks 1 are respectively placed at the jaw position of the machine tool, the tooth-shaped surfaces 1-1 of the two positioning blocks 1 are oppositely arranged, the side end surface of a reference block 1-2 on the upper positioning block 1 is tightly attached to the outer end surface of an upper clamp of the machine tool, the side end surface of a reference block 1-2 on the lower positioning block 1 is tightly attached to the outer end surface of a lower clamp of the machine tool, the side end surface 1-3 of the reference block 1-2 serves as a length positioning reference for installing the positioning blocks 1 to ensure that the two positioning blocks 1 are not staggered in the length direction, and the installation end surface 1-4 of the reference block 1-2 on the two positioning blocks 1 serves as a width positioning reference for installing the two positioning blocks 1 to ensure that the two positioning blocks 1 are not inclined in the width direction.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. The utility model provides a profile of tooth locating piece for clamping superalloy blade which characterized in that: the positioning device comprises two positioning blocks (1), wherein a toothed surface (1-1) is machined on one side end face of each positioning block (1), the toothed surface (1-1) is matched with a toothed surface of a blade root (2-1) part on a blade (2), a reference block (1-2) is machined on the other side end face of each positioning block (1), and the reference block (1-2) is perpendicular to the other side end face of each positioning block (1); the two positioning blocks (1) are arranged oppositely at one side with a tooth-shaped surface (1-1).
2. The toothed positioning block for clamping the high-temperature alloy blade as claimed in claim 1, wherein: the tooth-shaped surface (1-1) is positioned at the upper end of one side end surface of the positioning block (1).
3. The toothed positioning block for clamping the high-temperature alloy blade as claimed in claim 2, wherein: the reference block (1-2) is positioned at the upper end of the end face of the other side of the positioning block (1) and is flush with the upper end face of the positioning block (1).
4. The clamping and aligning method for processing the high-temperature alloy blade steam passage by using the tooth-shaped positioning block as claimed in claim 3 is characterized in that: the specific processing steps are as follows:
step 1, cutting off a part of a process clamp handle (2-2) of a blade (2) in a linear mode to enable a part of thimble holes (2-2-3) to be reserved on the outer end face of the process clamp handle (2-2);
step 2, a layer of copper is welded on the outer end face of the process clamp handle (2-2) of the blade (2) in a repairing mode, and the outer end face of the process clamp handle (2-2) after copper repairing is polished flat;
step 3, grinding the back radial direction (2-2-1) of the process clamp handle (2-2) of the blade (2) and the steam outlet side (2-2-2) of the process clamp handle (2-2), and detecting and recording the distance between the back radial direction (2-2-1) of the process clamp handle (2-2) and the Z axis of the blade and the distance between the steam outlet side (2-2-2) of the process clamp handle (2-2) and the Z axis of the blade by utilizing three coordinates;
step 4, mounting the two positioning blocks (1) on the jaw part of the machine tool;
step 5, clamping the blade root (2-1) of the blade (2) between the two positioning blocks (1);
step 6, respectively measuring the distance from the back radial direction (2-2-1) of the process clamp handle (2-2) of the blade (2) to the rotation center of the machine tool and the distance from the steam outlet side (2-2-2) to the rotation center of the machine tool by using a machine tool measuring head, and determining whether the clamping precision of the blade root (2-1) on the blade (2) is within a required range;
step 7, vertically inserting a machine tool thimble into the outer end surface of the process clamp handle (2-2) of the blade (2), and clamping the process clamp handle (2-2) of the blade (2) by using a hydraulic device of the machine tool;
and 8, processing the steam passage part of the blade (2).
5. The clamping and aligning method for machining the high-temperature alloy blade steam passage according to claim 4, characterized by comprising the following steps of: in the step 4, the two positioning blocks (1) are respectively arranged at the jaw position of the machine tool, the tooth-shaped surfaces (1-1) of the two positioning blocks (1) are oppositely arranged, the side end surface (1-3) of the reference block (1-2) on the upper positioning block (1) is tightly attached to the outer end surface of the jaw on the machine tool, and the side end surface (1-3) of the reference block (1-2) on the lower positioning block (1) is tightly attached to the outer end surface of the jaw on the lower machine tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611289.5A CN114888610A (en) | 2022-05-31 | 2022-05-31 | Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611289.5A CN114888610A (en) | 2022-05-31 | 2022-05-31 | Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage |
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| CN114888610A true CN114888610A (en) | 2022-08-12 |
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| CN202210611289.5A Withdrawn CN114888610A (en) | 2022-05-31 | 2022-05-31 | Tooth-shaped positioning block for positioning blade and clamping and aligning method for machining blade steam passage |
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| CN112059562A (en) * | 2020-09-01 | 2020-12-11 | 南通中能机械制造有限公司 | Production process of moving blade without crown |
| CN112077546A (en) * | 2020-09-08 | 2020-12-15 | 哈尔滨汽轮机厂有限责任公司 | Method for processing crown-free die forging palm tree blade root type blade |
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| CN113369830A (en) * | 2021-06-30 | 2021-09-10 | 中国航发动力股份有限公司 | Machining method for forging low-pressure turbine blade |
| CN113681466A (en) * | 2021-08-20 | 2021-11-23 | 中国航发航空科技股份有限公司 | Novel integrated machining clamp for turbine blade of aero-engine and machining process of novel integrated machining clamp |
| CN114310203A (en) * | 2021-12-31 | 2022-04-12 | 无锡透平叶片有限公司 | Secondary processing method for assembling surfaces of blade shroud and boss of steam turbine blade |
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2022
- 2022-05-31 CN CN202210611289.5A patent/CN114888610A/en not_active Withdrawn
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