CN113909591A - Aero-engine electric spark machining clamp and clamping method - Google Patents
Aero-engine electric spark machining clamp and clamping method Download PDFInfo
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- CN113909591A CN113909591A CN202111357389.1A CN202111357389A CN113909591A CN 113909591 A CN113909591 A CN 113909591A CN 202111357389 A CN202111357389 A CN 202111357389A CN 113909591 A CN113909591 A CN 113909591A
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- block
- honeycomb ring
- radial
- ring arc
- mounting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses an aeroengine electric spark machining clamp and a clamping method, which are used for machining a honeycomb ring arc block. The honeycomb ring arc block clamping device has the advantages that the cross section, the inner circle and the end face of the honeycomb ring arc block are respectively positioned in a contact manner through the circumferential positioning block, the radial mounting block and the radial reference block, so that the honeycomb ring arc block is accurately and firmly clamped, the electric spark machining quality is ensured, the two honeycomb ring arc blocks can be clamped at one time through the symmetrical structural design, and the machining efficiency of the honeycomb ring arc block is greatly improved.
Description
Technical Field
The invention relates to the technical field of electric spark machining fixtures and clamping, in particular to an electric spark machining fixture and a clamping method for a honeycomb ring arc block of an aero-engine.
Background
The outer casing honeycomb ring is an important part of a low-pressure turbine guider of an aircraft engine, and as shown in fig. 1 and 7, the outer casing honeycomb ring is divided into 36 equal arc blocks in actual processing, grooves are processed in sections of two ends of the arc block of the honeycomb ring, and then the arc block is assembled into the low-pressure turbine guider through the grooves.
When the electric spark machining is carried out on the honeycomb ring arc block groove, the honeycomb ring groove needs to be clamped and positioned, the upper end and the lower end of the arc block are clamped and axially positioned by using a tiger clamp in the conventional clamping and positioning method, the clamping is unstable, the machining quality depends on the machining experience of an operator, the risk is too high, the electric spark machining quality of one honeycomb ring arc block is unqualified, and the whole honeycomb ring is scrapped. And the single-side section of the arc block of the honeycomb ring is machined and then the other side is machined by turning, so that the clamping and machining are complicated, 1200 minutes is needed for machining one honeycomb ring, and the machining efficiency is low.
In view of this, it is necessary to design an electric spark machining fixture and a clamping method for an aircraft engine honeycomb ring arc block, which not only ensure the electric spark machining quality, but also greatly improve the machining efficiency.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an aeroengine electric spark machining clamp and a clamping method, which are used for machining honeycomb ring arc blocks, not only enable the honeycomb ring arc blocks to be accurately clamped and positioned in an electric spark machining mode and improve the machining quality of the honeycomb ring arc blocks, but also can simultaneously machine two honeycomb ring arc blocks, reduce the complex re-clamping and positioning, and improve the machining efficiency by 50% compared with the existing machining method.
In order to realize the purpose, the invention adopts the following technical scheme:
an aeroengine electric spark processing clamp is used for processing a honeycomb ring arc block, the honeycomb ring arc block comprises an end face positioned in the axial direction, an inner circle positioned in the radial direction and a cross section positioned on the circumferential end face, the electric spark processing clamp comprises,
the mounting base is provided with a mounting groove, and is connected with the electric spark machine tool through the mounting groove;
the supporting block is connected to the middle position of the upper end face of the mounting base, and two side surfaces which are parallel to each other and vertical to the upper end face of the mounting base are arranged on the supporting block;
the upper end surfaces of the circumferential positioning blocks are provided with circumferential reference bosses, the upper surfaces of the circumferential reference bosses are circumferential reference surfaces, and an included angle is formed between each circumferential reference surface and the horizontal plane and meets the condition that when one end of the honeycomb ring arc block is placed on the circumferential reference surface, the cross section of the other end of the honeycomb ring arc block is parallel to the horizontal plane;
the two radial mounting blocks are respectively connected to two parallel side surfaces of the supporting block and positioned above the circumferential positioning block, compression screws are connected to the radial mounting blocks in a threaded manner and penetrate through the radial mounting blocks, and the tail ends of the compression screws point to the honeycomb ring arc block;
the radial reference blocks are respectively connected to two parallel side surfaces of the supporting block and located above the circumferential positioning block, a radial reference surface and an axial reference surface are arranged on the surface of each radial reference block and are perpendicular to each other, the radial reference surfaces are in contact with the inner circle of the honeycomb ring arc block, and the axial reference surfaces are in contact with the end face of the honeycomb ring arc block.
Further, the installation base is a cube, and the installation grooves are distributed at two ends of the installation base in the length direction and are symmetrical about the supporting block.
Further, the mounting groove is a notch which penetrates through two end faces in the thickness direction of the mounting base.
Furthermore, the tail end of the compression screw is connected with a safety bolt, and the surface area of the safety bolt in contact with the honeycomb ring arc block is larger than the cross-sectional area of the tail end of the compression screw.
Furthermore, a second mounting threaded hole and a clamping threaded hole are formed in the radial mounting block, the radial mounting block is connected to the supporting block through a bolt in the second mounting threaded hole, and the compression screw is in threaded connection with the clamping threaded hole.
Furthermore, a first mounting threaded hole is formed in the radial reference block, and the radial reference block is connected to the supporting block through a bolt in the first mounting threaded hole.
Further, the circumferential reference surface, the radial reference surface and the axial reference surface are symmetrically distributed about the two parallel side surfaces on the support block. The symmetry plane here is a bisector of two parallel planes, i.e. the bisector is located in the middle of the two parallel side surfaces (the perpendicular distance between the two parallel side surfaces is the middle position) and is parallel to the two parallel side surfaces, with the bisector as the symmetry plane.
Further, the circumferential reference surface is an inclined plane;
the radial reference surface is an arc surface with the outer diameter consistent with the inner diameter of the inner circle of the honeycomb ring arc block; a
The axial reference plane is a plane.
The electric spark machining clamping method for the honeycomb ring arc blocks of the aero-engine comprises the steps of adopting the electric spark machining clamp, installing the two honeycomb ring arc blocks on two sides of a supporting block at the same time, enabling the end faces of the honeycomb ring arc blocks to be in contact with an axial datum plane, an inner circle of the honeycomb ring arc blocks to be in contact with a radial datum plane and a cross section of the honeycomb ring arc blocks to be located through adjusting compression screws, and finally connecting the honeycomb ring arc blocks to an electric spark machine tool through installing grooves in an installing base.
In the existing machining method, the clamping and positioning method for the honeycomb ring arc block adopts a tiger clamp to clamp and axially position the upper end and the lower end of the arc block, the clamping is unstable, the machining quality depends on the machining experience of operators, the risk is too high, the electric spark machining quality of one honeycomb ring arc block is unqualified, and the whole honeycomb ring is scrapped. And the single-side section of the arc block of the honeycomb ring is machined and then the other side is machined by turning, so that the clamping and machining are complicated, 1200 minutes is needed for machining one honeycomb ring, and the machining efficiency is low. Compared with the prior art, the invention has the following characteristics:
on the one hand, according to the honeycomb ring arc block electric spark machining clamp and the clamping method, the honeycomb ring arc block is circumferentially supported and positioned through the circumferential positioning block, the radial reference block and the compression screw jointly act to compress the honeycomb ring arc block to be fixed in the radial direction, the axial reference surface of the radial reference block is in contact with the end face of the honeycomb ring arc block to axially position the honeycomb ring arc block, and the honeycomb ring arc block is accurately positioned and convenient to operate through the radial, circumferential and axial positioning functions without depending on the operation hand feeling of an operator, so that the quality of an electric spark machining section groove is guaranteed.
On the other hand, the other end of the supporting block is provided with the same circumferential positioning block, the same radial mounting block and the same radial reference block, and the two ends of the supporting block are bilaterally symmetrical relative to the supporting block and used for simultaneously clamping 2 honeycomb ring arc blocks, so that 1-half clamping process and machining are reduced. And meanwhile, two honeycomb ring arc blocks are clamped, so that the complicated clamping and aligning processes and the machining process are reduced by half, the machining time is reduced by half, and the efficiency is improved by 50%.
In conclusion, the electric spark machining clamp and the clamping method for the honeycomb ring arc block not only ensure the machining quality, but also greatly improve the machining efficiency.
Drawings
FIG. 1 is a schematic view of a honeycomb ring segment of the present invention;
FIGS. 2 and 3 are schematic illustrations of honeycomb ring segment clamping of the present invention;
FIG. 4 is a schematic illustration of the datum support block of the present invention;
FIG. 5 is a radial reference block of the present invention;
FIG. 6 is a radial support block of the present invention;
FIG. 7 is a honeycomb ring arc block of the present invention;
in the figure, 2, a base is installed; 3. mounting grooves; 4. a support block; 5. circumferential positioning blocks; 6. a circumferential reference boss; 7. a honeycomb ring arc block; 8. a radial mounting block; 9. a compression screw; 10. a safety bolt; 11. a radial reference block; 12. a circumferential datum plane; 13. a first mounting threaded hole; 14. a radial reference plane; 15. an end face; 16. an inner circle; 17. a cross-section; 18. a second mounting threaded hole; 19. clamping the threaded hole; 20. an axial reference plane.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter of the present invention is limited to the following embodiments, and various modifications, substitutions and alterations made based on the common technical knowledge and conventional means in the art without departing from the technical idea of the present invention are included in the scope of the present invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, the invention relates to a fixture for electrical discharge machining of a honeycomb ring arc block groove and a clamping method thereof. The fixture mainly comprises an installation base 2, wherein the installation base 2 is a rectangular hexahedron, the left end and the right end of the installation base are provided with the same installation grooves 3, and the installation grooves 3 penetrate through the upper end face and the lower end face of the rectangular hexahedron and are used for being fixed on an electric spark machining machine tool.
The middle of the mounting base 2 is fixedly connected with a supporting block 4, the supporting block 4 is a three-dimensional block and is used for mounting and supporting a circumferential positioning block 5, a radial mounting block 8, a radial reference block 11 and the like, and therefore the honeycomb ring arc block 7 is mounted and supported.
A circumferential positioning block 5 is fixedly connected to the middle part of the supporting block 4 in the height direction, and the circumferential positioning block 5 is a cube block and used for mounting a circumferential reference boss 6.
The upper surface of the circumferential reference boss 6 is inclined, and the inclined surface forms a circumferential reference surface 12 for positioning and supporting cross sections 17 of the honeycomb ring arc block 7 (the honeycomb ring arc block 7 has two cross sections 17, and one of the cross sections 17 is positioned in contact with the circumferential reference surface 12 when the honeycomb ring arc block 7 is vertically placed).
In particular, the angle between the circumferential reference surface 12 and the horizontal plane is 2.3 degrees, so that the cross section 17 of the upper end of the honeycomb ring arc block 7 to be processed is parallel to the horizontal plane, and the processing of the groove by the electrode block is facilitated.
As shown in fig. 5, radial reference blocks 11 are mounted on two parallel side surfaces of the support block 4 opposite to the circumferential reference bosses 6, and the radial reference blocks 11 are fixed on the side surfaces of the support block 4 through 3 first mounting threaded holes 13.
As shown in fig. 3 and 5, a radial reference surface 14 is machined on the surface of the radial reference block 11, the radial reference surface 14 is in contact with an inner circle 16 of the honeycomb ring arc block 7, and the radial reference surface 14 is an arc surface with an outer diameter consistent with the inner diameter of the inner circle 16 and is used for radially positioning the honeycomb ring arc block 7.
As shown in fig. 3 and 5, a surface perpendicular to the radial reference surface 14 is machined on the radial reference block 11 as an axial reference surface 20, and the axial reference surface 20 is used for positioning the axial end surface 15 of the honeycomb ring arc block 7.
As shown in fig. 2 and 6, radial mounting blocks 8 are further mounted on two parallel side surfaces of the supporting block 4, the radial mounting blocks 8 and the radial reference block 11 are respectively arranged on two sides of the honeycomb ring arc block 7, and the radial mounting blocks 8 are fixedly connected with the supporting block 4 through 2 second mounting threaded holes 18.
As shown in fig. 6, the radial mounting block 8 is provided with a clamping threaded hole 19 for mounting the compression screw 9, and the compression screw 9 is screwed to press the tail end of the compression screw 9 against the surface of the honeycomb ring arc block 7, so as to clamp and position the honeycomb ring arc block 7.
As shown in fig. 2, the safety bolt 10 is installed at the tail end of the compression screw 9, and the end of the safety bolt 10, which is in contact with the honeycomb ring arc block 7, has a large surface area so as to increase the contact area between the compression screw 9 and the honeycomb ring arc block 7, so that the honeycomb ring arc block 7 is uniformly stressed, and the compression screw 9 is prevented from crushing the honeycomb ring arc block 7.
As shown in fig. 2 and 3, the same circumferential positioning block 5, radial mounting block 8 and radial reference block 11 are symmetrically arranged on the parallel side surfaces of the left and right sides of the supporting block 4, and the two sides are symmetrical left and right for simultaneously clamping the two honeycomb ring arc blocks 7, thereby reducing the clamping process and the processing time.
When the honeycomb ring arc blocks 7 are specifically machined, the two honeycomb ring arc blocks 7 are simultaneously installed on the left side and the right side of the supporting block 4 respectively, the end face 15 of the honeycomb ring arc block 7 is in contact with and is positioned on the axial datum plane 20, the inner circle 16 and the radial datum plane 14, and the cross section 17 and the circumferential datum plane 12 through adjusting the compression screws 9, and finally the honeycomb ring arc blocks are connected to an electric spark machine tool through the installation grooves 3 on the installation base 2, so that clamping work before electric spark machining is completed.
Claims (9)
1. The utility model provides an aeroengine spark-erosion machining anchor clamps for the processing of honeycomb ring arc piece (7), honeycomb ring arc piece (7) are including terminal surface (15) that are located axial direction, the interior circle (16) that are located radial direction and cross section (17) that are located the circumference terminal surface, its characterized in that: the electric discharge machining clamp comprises a clamp body,
the electric spark machining device comprises a mounting base (2), wherein a mounting groove (3) is machined in the mounting base (2), and the mounting base (2) is connected with an electric spark machine tool through the mounting groove (3);
the supporting block (4) is connected to the middle position of the upper end face of the mounting base (2), and two side surfaces which are parallel to each other and vertical to the upper end face of the mounting base (2) are arranged on the supporting block (4);
the honeycomb ring arc block comprises circumferential positioning blocks (5), wherein the two circumferential positioning blocks (5) are respectively connected to two parallel side surfaces of a supporting block (4), a circumferential reference boss (6) is installed on the upper end surface of each circumferential positioning block (5), the upper surface of each circumferential reference boss (6) is a circumferential reference surface (12), and an included angle is formed between each circumferential reference surface (12) and the horizontal plane and meets the condition that when one end of the honeycomb ring arc block (7) is placed on each circumferential reference surface (12), the cross section (17) of the other end is parallel to the horizontal plane;
the two radial mounting blocks (8) are respectively connected to two parallel side surfaces of the supporting block (4) and located above the circumferential positioning block (5), compression screws (9) are connected to the radial mounting blocks (8) in a threaded manner, the compression screws (9) penetrate through the radial mounting blocks (8), and the tail ends of the compression screws (9) point to the honeycomb ring arc blocks (7);
the honeycomb ring arc block comprises radial reference blocks (11), wherein the two radial reference blocks (11) are respectively connected to two parallel side surfaces of a supporting block (4) and located above a circumferential positioning block (5), a radial reference surface (14) and an axial reference surface (20) are arranged on the surface of each radial reference block (11), the radial reference surface (14) and the axial reference surface (20) are perpendicular to each other, the radial reference surface (14) is in contact with an inner circle (16) of a honeycomb ring arc block (7), and the axial reference surface (20) is in contact with an end face (15) of the honeycomb ring arc block (7).
2. An aircraft engine electric discharge machining fixture as claimed in claim 1, wherein: the mounting base (2) is cubic, and the mounting grooves (3) are distributed at two ends of the mounting base (2) in the length direction and are symmetrical relative to the supporting blocks (4).
3. An aircraft engine electric discharge machining fixture as claimed in claim 2, wherein: the mounting groove (3) is a notch which penetrates through two end faces in the thickness direction of the mounting base (2).
4. An aircraft engine electric discharge machining fixture as claimed in claim 1, wherein: the tail end of the compression screw (9) is connected with a safety bolt (10), and the surface area of the safety bolt (10) in contact with the honeycomb ring arc block (7) is larger than the cross-sectional area of the tail end of the compression screw (9).
5. An aircraft engine electric discharge machining fixture as claimed in claim 1, wherein: the radial mounting block (8) is provided with a second mounting threaded hole (18) and a clamping threaded hole (19), the radial mounting block (8) is connected to the supporting block (4) through a bolt in the second mounting threaded hole (18), and the compression screw (9) is in threaded connection with the clamping threaded hole (19).
6. An aircraft engine electric discharge machining fixture as claimed in claim 1, wherein: a first mounting threaded hole (13) is formed in the radial reference block (11), and the radial reference block (11) is connected to the supporting block (4) through a bolt in the first mounting threaded hole (13).
7. An aircraft engine electric discharge machining fixture as claimed in claim 1, wherein: the circumferential reference surface (12), the radial reference surface (14) and the axial reference surface (20) are symmetrically distributed about two parallel side surfaces on the support block (4).
8. An aircraft engine electric discharge machining fixture as claimed in claim 7, wherein:
the circumferential reference surface (12) is an inclined plane;
the radial reference surface (14) is an arc surface with the outer diameter consistent with the inner diameter of an inner circle (16) of the honeycomb ring arc block (7);
the axial reference plane (20) is a plane.
9. An electric spark machining clamping method for an aeroengine honeycomb ring arc block is characterized by comprising the following steps: the electric spark machining fixture as claimed in claim 1, wherein two honeycomb ring arc blocks (7) are respectively and simultaneously installed on two sides of the supporting block (4), the end face (15) of each honeycomb ring arc block (7) is in contact with and positioned on the axial datum plane (20), the inner circle (16) is in contact with the radial datum plane (14) and the cross section (17) is in contact with the circumferential datum plane (12) through adjusting the compression screws (9), and finally the honeycomb ring arc blocks are connected to an electric spark machine tool through the installation grooves (3) in the installation base (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111357389.1A CN113909591B (en) | 2021-11-16 | 2021-11-16 | Aeroengine electric spark machining clamp and clamping method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111357389.1A CN113909591B (en) | 2021-11-16 | 2021-11-16 | Aeroengine electric spark machining clamp and clamping method |
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| Publication Number | Publication Date |
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| CN113909591A true CN113909591A (en) | 2022-01-11 |
| CN113909591B CN113909591B (en) | 2023-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111357389.1A Active CN113909591B (en) | 2021-11-16 | 2021-11-16 | Aeroengine electric spark machining clamp and clamping method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6082722A (en) * | 1999-04-29 | 2000-07-04 | Cvijanovic; Frank T. | Fixture and method for supporting an irregular workpiece |
| US20140069164A1 (en) * | 2012-09-10 | 2014-03-13 | Dadco, Inc. | Toe Clamp, and Related Manufacturing Method, Clamping Arrangement, and Fixture |
| CN106624856A (en) * | 2016-12-28 | 2017-05-10 | 无锡透平叶片有限公司 | Clamping device for processing mushroom-shaped blade having Z-shaped blade shroud |
| EP3527786A1 (en) * | 2018-02-20 | 2019-08-21 | General Electric Company | Turbomachine modification apparatus and method |
| EP3771514A1 (en) * | 2019-07-31 | 2021-02-03 | Raytheon Technologies Corporation | Baffle tube with two datum features |
| CN113399720A (en) * | 2021-07-01 | 2021-09-17 | 中国航发贵州黎阳航空动力有限公司 | Outer casing honeycomb ring arc block milling clamp and method |
-
2021
- 2021-11-16 CN CN202111357389.1A patent/CN113909591B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6082722A (en) * | 1999-04-29 | 2000-07-04 | Cvijanovic; Frank T. | Fixture and method for supporting an irregular workpiece |
| US20140069164A1 (en) * | 2012-09-10 | 2014-03-13 | Dadco, Inc. | Toe Clamp, and Related Manufacturing Method, Clamping Arrangement, and Fixture |
| CN106624856A (en) * | 2016-12-28 | 2017-05-10 | 无锡透平叶片有限公司 | Clamping device for processing mushroom-shaped blade having Z-shaped blade shroud |
| EP3527786A1 (en) * | 2018-02-20 | 2019-08-21 | General Electric Company | Turbomachine modification apparatus and method |
| EP3771514A1 (en) * | 2019-07-31 | 2021-02-03 | Raytheon Technologies Corporation | Baffle tube with two datum features |
| CN113399720A (en) * | 2021-07-01 | 2021-09-17 | 中国航发贵州黎阳航空动力有限公司 | Outer casing honeycomb ring arc block milling clamp and method |
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| Publication number | Publication date |
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| CN113909591B (en) | 2023-05-12 |
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