CN113751740A - Grooving cutter for silicon rubber inner ring groove group of case and machining method thereof - Google Patents
Grooving cutter for silicon rubber inner ring groove group of case and machining method thereof Download PDFInfo
- Publication number
- CN113751740A CN113751740A CN202111152634.5A CN202111152634A CN113751740A CN 113751740 A CN113751740 A CN 113751740A CN 202111152634 A CN202111152634 A CN 202111152634A CN 113751740 A CN113751740 A CN 113751740A
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- cutting
- turning
- ring groove
- inner ring
- tool
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- 238000003754 machining Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 12
- 229920002379 silicone rubber Polymers 0.000 title description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 128
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000741 silica gel Substances 0.000 claims abstract description 26
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 26
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 229920001971 elastomer Polymers 0.000 claims description 4
- 238000005476 soldering Methods 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000002023 wood Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 208000012260 Accidental injury Diseases 0.000 description 2
- 230000010485 coping Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
Abstract
The invention discloses a grooving cutter for a cartridge receiver silica gel inner ring groove group and a machining method thereof, and belongs to the technical field of machining of parts of aero-engines. A lathe groove sword of cartridge receiver silica gel inner ring groove group includes: the turning tool comprises a turning tool body and a turning blade connected to the end part of the turning tool body; the turning blade comprises a connecting section connected with the turning tool body and a cutting section for processing the inner ring groove group of the silica gel of the case, and the cutting section is matched with the inner ring groove group of the silica gel of the case. The turning blade is connected to the end part of the turning tool body through the connecting section to form an integral type tool, so that the rigidity of the tool during cutting is guaranteed; and the cutting section of the turning blade is adaptively designed according to the structural characteristics and the characteristics of the composite material of the inner ring groove group part of the cartridge receiver silica gel to be processed, so that the processing precision of the inner ring groove group of the cartridge receiver silica gel is ensured.
Description
Technical Field
The invention relates to the technical field of machining of parts of aero-engines, in particular to a grooving cutter for a cartridge receiver silica gel inner groove group and a machining method of the grooving cutter.
Background
Because customers design the silicon rubber precision inner circular groove group structure for the first time in China to improve the performance of an engine and solve the problem of noise of a gas compressor, related grooving cutters do not exist in China at present, and the invention innovation is carried out on the silicon rubber precision inner circular groove group grooving cutters for meeting the qualified on-time delivery of parts. Aiming at the prior art, the processing of the part has the following difficulties:
(1) the characteristics are many, and shape size precision is high: the ring groove group consists of 12 continuous ring grooves, the height dimension from each ring groove to a datum plane is 49 +/-0.2, 54.6 +/-0.2, 60.2 +/-0.2, 65.8 +/-0.2, 71.4 +/-0.2, 77 +/-0.2, 82.6 +/-0.2, 88.2 +/-0.2, 93.8 +/-0.2, 99.4 +/-0.2, 105 +/-0.2, 110.6 +/-0.2 and 114.4 +/-0.2 respectively, and the inner ring flow channel surface jumps by 0.05.
(2) The structure is complex and the rigidity is poor: the structure of the part is positioned on the variable-diameter inner runner surface of the casing, the diameter of the bottom of the groove is maximum phi 804.9(+0.1/0), the diameter of the bottom of the groove is minimum phi 797.72(+0.1/0), the wall thickness between the ring grooves is 1.8 +/-0.1, and the fillet R of the root part of the groove is 1.5 +/-0.5. The existing structure of the groove cutter is very easy to be damaged in the processing, and can not form a complete grouped ring groove.
(3) The material is difficult to process: the hardness of the material is 60 +/-5 Shore hardness, the material is a softer flexible composite material, and a large allowance cutter back-off can be generated in the extrusion cutting of a cutter. Meanwhile, the glass beads are added into the material, so that the cutter is very easy to stick and wear.
Disclosure of Invention
The invention aims to provide a grooving cutter for a cartridge receiver silica gel inner circular groove group, which solves the problems of inconvenience of the existing cartridge receiver silica gel inner circular groove group.
The technical scheme for solving the technical problems is as follows:
a lathe groove sword of cartridge receiver silica gel inner ring groove group includes: the turning tool comprises a turning tool body and a turning blade connected to the end part of the turning tool body;
the turning blade comprises a connecting section connected with the turning tool body and a cutting section for processing the inner ring groove group of the silica gel of the case, and the cutting section is matched with the inner ring groove group of the silica gel of the case;
the lathe tool body includes relative first side and the second side that sets up, is equipped with the cutting edge mouth end of keeping away from the linkage segment on the cutting section, and cutting edge mouth end and first side lie in the coplanar, and the linkage segment is the arc structure, and the center coincidence of the arc center of this arc structure and cutting edge mouth end and first side line.
The turning blade is connected to the end part of the turning tool body through the connecting section to form an integral type tool, so that the rigidity of the tool during cutting is guaranteed; and the cutting section of the turning blade is designed in a matching way according to the structural characteristics and the characteristics of the composite material of the inner ring groove group part of the cartridge receiver silica gel to be processed, so that the processing precision of the inner ring groove group of the cartridge receiver silica gel is ensured.
Further, the cutting segment includes: four cutting edges arranged at intervals, and each cutting edge is arranged in parallel.
By arranging the four cutting edges, different ring grooves can be cut simultaneously, so that the machining efficiency is improved; the machining device can be in a multiple relation with the quantity of twelve ring grooves, all the ring grooves can be machined through three times of machining, and the same ring groove is prevented from being machined repeatedly. And every two cutting edges can generate cutting force in opposite directions on the side wall between the adjacent ring grooves of the ring groove group in the machining process, and the cutting force can be counteracted after coupling, so that the extrusion deformation is reduced, and the size precision of the wall thickness between the ring grooves is ensured.
Further, the positive rake angle γ of the cutting edge020-22 deg., and the rake face of the cutting edge has chip flutes with a radius of 12.5-13 mm.
According to the invention, through setting the reasonable positive rake angle and the proper chip groove, the chips in different states generated in the machining process can be conveniently collected, and the durability of the cutter can be ensured.
Furthermore, the effective cutting length L of the cutting edge is more than or equal to 3.6 mm.
Further, the effective cutting length L of the cutting edge is 5 mm.
Further, the width D of the cutting edge is (0.05 to 0.1) mm, i.e., the groove width + (0.05 to 0.1).
Furthermore, the non-cutting and cutting areas of the cutting edge are connected through a convex arc, and the convex arc connection angle theta is more than or equal to 120 degrees.
The invention limits the lower limit of the length of the effective cutting edge, the width of the effective cutting edge, the non-cutting of the cutting edge and the switching arc and the switching angle of the cutting area through the actual cutting length, and considers the coping error of the cutter to obtain the optimal cutting length, thereby ensuring that the normal stress of the side wall of the ring groove is reduced in the processing process, avoiding the over-cutting or block falling after the extrusion and deformation of the ring groove opening, and improving the processing surface quality of the ring groove.
Further, the end face of the turning tool body and the turning blade are connected through high-frequency silver soldering.
According to the invention, the turning blade is welded on the end surface of the turning tool body, so that the turning tool has the characteristics of more convenient welding and clamping, the interference of a tool rest and a tool shaft when the side surface is welded can be effectively avoided, and the structural rigidity of the whole tool can be increased.
A processing method of a grooving cutter for a cartridge receiver silica gel inner ring groove group adopts the grooving cutter for the cartridge receiver silica gel inner ring groove group, and comprises the following steps:
s1: the grooving tool is mounted, an upper cutting edge is used for tool setting, and the grooving tool is knocked and aligned through layout in the tool setting process;
s2: executing a numerical control program, turning four annular grooves below the annular groove group by multiple times of feeding, and removing cuttings attached to the blade after retracting the cutter;
s3: executing a numerical control program, turning four ring grooves in the ring groove group by multiple times of feeding, and removing chips attached to the blade after retracting;
s4: and executing a numerical control program, turning four ring grooves on the ring groove group by multiple times of feeding, and removing cuttings attached to the blade after the cutter is withdrawn to finish machining.
According to the invention, through reasonable tool setting and knocking alignment, the tool mounting precision is ensured as a basis, and the machining precision is ensured; four cutting edges are arranged, the annular groove group is machined for three times, and machining efficiency is effectively guaranteed; the adhered cutting chips are removed after each machining is finished, so that the influence of the adhesion of the cutting chips on the precision of individual ring grooves is effectively avoided, and the durability of the cutter is improved.
Further, in the step S1, a rubber hammer or a wood hammer is used for knocking; in steps S2-S4, the feed is divided into three times, and the feed amount is respectively as follows: 1.6mm, 0.2 mm. .
According to the invention, the rubber hammer and the female hammer are used for knocking and aligning, so that the knocking effect is ensured, and meanwhile, the accidental injury to the lathe tool blade in the knocking process can be avoided. During machining, feeding is carried out for three times, and influence on the durability of the cutting edge caused by large single cutting amount is avoided through progressive feeding; and the tool consumption is obviously reduced during the last feeding, thereby further ensuring the processing precision of the ring groove.
The invention has the following beneficial effects:
(1) the turning blade is connected to the end part of the turning tool body through the connecting section to form an integral type tool, so that the rigidity of the tool during cutting is guaranteed; and the cutting section of the turning blade is designed in a matching way according to the structural characteristics and the material characteristics of the inner ring groove group part of the cartridge receiver silica gel to be processed, so that the processing precision of the inner ring groove group of the cartridge receiver silica gel is ensured.
(2) In the machining process of every two cutting edges, cutting forces in opposite directions are generated on the side walls between the adjacent ring grooves of the ring groove groups, and the cutting forces can be counteracted after coupling, so that the extrusion deformation is reduced, and the size precision of the wall thickness between the ring grooves is ensured; the effective cutting length and width of each cutting edge, the non-cutting of each cutting edge and the switching arc and switching angle of the cutting area are customized and limited, the normal stress of the side wall of the ring groove in the cutting process is effectively reduced, and the excessive cutting or block falling after the ring groove opening is extruded and deformed is avoided. Thereby ensuring the machining accuracy.
(3) According to the invention, through reasonable tool setting and knocking alignment, the machining precision is ensured on the basis of ensuring the tool mounting precision; and four cutting edges are arranged, the annular groove group is machined for three times, machining efficiency is effectively guaranteed, attached cuttings are removed after machining is completed every time, and therefore the problem that the cuttings attach to the precision of individual annular grooves to cause influence is effectively avoided.
Drawings
FIG. 1 is a schematic structural view of a grooving tool for an inner annular groove set of a cartridge receiver silica gel according to the present invention;
FIG. 2 is a schematic view of the cutting edge structure of the present invention;
fig. 3 is a schematic structural diagram of a silicone inner ring groove set of the casing according to the present invention.
In the figure: 10-turning a cutter body; 11-a first side; 12-a second side; 20-turning a blade; 21-a connecting segment; 22-a cutting section; 23-a cutting edge; 24-edge end.
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
Referring to fig. 1 and 2, a grooving tool for a cartridge silicon inner ring groove set includes: a cutter body 10 and a cutter blade 20 attached to an end of the cutter body 10.
The cross section of the turning tool body 10 is 25mm or 32mm, so that the material cost of the cutting tool is reduced, and the tool rest clamping requirements of most numerical control lathes can be met. The material of the lathe tool body 10 is 45# steel, and the hardness is HRC: 35-40.
The turning blade 20 includes: the connecting section 21 of being connected with the lathe tool body 10 and the cutting section 22 of carrying out processing to cartridge receiver silica gel inner ring groove group to the connecting section 21 passes through high frequency silver-soldering with the terminal surface of lathe tool body 10 and is connected, through welding turning blade 20 at the terminal surface of lathe tool body 10, possesses the more convenient characteristics of welding and clamping, produces lathe tool rest and arbor interference problem easily when can effectively avoiding the side welding, can also increase the structural rigidity of whole cutter.
The body 10 includes a first side 11 and a second side 12 opposite to each other, and the cutting section 22 has a cutting edge 24 away from the connecting section 21, wherein the cutting edge 24 is in the same plane as the first side 11. The connecting section 21 is of an arc-shaped structure, and the arc center of the arc-shaped structure coincides with the center of a connecting line between the cutting edge end 24 and the first side surface 11, so that the rigidity and stability of the cutting section 22 before cutting can be improved, and the rigidity and stability of the cutting section during cutting can be improved.
The cutting section 22 includes: the four cutting edges 23 are arranged at intervals, and the four cutting edges 23 can be used for cutting different ring grooves at the same time, so that the machining efficiency is improved; the number of the cutting edges 23 is in a multiple relation with the number of the twelve ring grooves, and all the ring grooves can be machined by three times of machining, so that the same ring groove is prevented from being repeatedly machined.
Referring to table 1, the optimal number of the cutting edges 23 is four after comprehensive comparison by analyzing different cutting effects and different tool structures generated by different numbers of the cutting edges 23.
Table 1: relation table of number of cutting edges, cutting effect and cutter structure
Referring to fig. 1 and 2, in the design of a single cutting edge 23, considering that the machining material is a flexible composite material, the chip exists in two states at the same time: powder and long strip. When the long continuous chip flows out along the rake face, the contact length with the rake face is long, and the cutting edge 23 is required to be as sharp as possible, and the powdery chip flows out on the rake face and adheres to the non-cutting region of the tool. On the premise of meeting the durability of the cutter, a positive rake angle gamma is selected020-22 degrees and grind a chip groove with the radius R of 12.5-13mm on the front face. The effective cutting length L of the cutting edge 23 is more than or equal to 3.6mm, because the coping error is considered, the effective cutting length L is 5 mm; the width D of the cutting edge 23 in the effective cutting length range is equal to the groove width plus (0.05-0.1) mm; the non-cutting and cutting regions of the cutting edge 23 being adapted by means of a convex arcThe switching angle theta of the convex arc is more than or equal to 120 degrees, so that the normal stress of the side wall of the annular groove in the cutting process is effectively reduced, the annular groove opening is prevented from being over-cut or falling after being extruded and deformed, and the machining precision is ensured.
A processing method of a grooving cutter for a cartridge receiver silica gel inner ring groove group adopts the grooving cutter for the cartridge receiver silica gel inner ring groove group, and comprises the following steps:
s1: the grooving tool is mounted, an upper cutting edge is used for tool setting, and the grooving tool is knocked and aligned through layout in the tool setting process; in step S1, the blade 20 is knocked by a rubber hammer or a wooden hammer, so as to avoid accidental injury to the blade during knocking while ensuring the knocking effect.
S2: and executing a numerical control program, turning four annular grooves below the annular groove group by multiple times of feeding, and removing chips attached to the blade after the cutter is withdrawn.
S3: and executing a numerical control program, cutting the four ring grooves in the ring groove group by multiple times of feeding, and removing chips attached to the blade after the cutter is withdrawn.
S4: and executing a numerical control program, turning four ring grooves on the ring groove group by multiple times of feeding, and removing cuttings attached to the blade after the cutter is withdrawn to finish machining. In steps S2-S4, the feed is divided into three times, and the feed amounts are respectively: 1.6mm, 1.6mm and 0.2mm, and the influence of excessive single cutting feed on the durability of the cutting edge 23 is avoided through progressive feed; and the tool consumption is obviously reduced during the last feeding, thereby further ensuring the processing precision of the ring groove.
According to the invention, through reasonable tool setting and knocking alignment, the machining precision is ensured on the basis of ensuring the tool mounting precision; four cutting edges 23 are arranged, the annular groove group is machined in three times, and machining efficiency is effectively guaranteed; the adhered cutting chips are removed after each machining is finished, so that the influence of the adhesion of the cutting chips on the precision of the individual ring grooves is effectively avoided.
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 (10)
1. The utility model provides a lathe groove sword of cartridge receiver silica gel inner ring groove group which characterized in that includes: the turning tool comprises a turning tool body (10) and a turning blade (20) connected to the end part of the turning tool body (10);
the turning blade (20) comprises a connecting section (21) connected with the turning body (10) and a cutting section (22) for processing the inner ring groove group of the cartridge receiver silica gel, and the cutting section (22) is matched with the inner ring groove group of the cartridge receiver silica gel;
the turning tool body (10) comprises a first side face (11) and a second side face (12) which are oppositely arranged, a cutting edge end (24) far away from the connecting section (21) is arranged on the cutting section (22), the cutting edge end (24) and the first side face (11) are located in the same plane, the connecting section (21) is of an arc-shaped structure, and the arc center of the arc-shaped structure is coincided with the center of a connecting line of the cutting edge end (24) and the first side face (11).
2. The grooving tool for an inner silicone ring groove set of a casing according to claim 1, wherein the cutting section (22) comprises: four cutting edges (23) arranged at intervals, and the cutting edges (23) are arranged in parallel.
3. Grooving tool for the inner ring groove set of casing silicone according to claim 2, wherein the positive rake angle γ of the cutting edge (23) is0Is 20-22 DEG and the rake face of the cutting edge (23) has chip flutes with a radius of 12.5-13 mmmm.
4. The grooving tool for the inner annular groove group of the cartridge case silicone as claimed in claim 2, wherein an effective cutting length L of the cutting edge (23) is not less than 3.6mm, and a cutting edge width D ═ groove width + (0.05-0.1) mm within the effective cutting length range.
5. The grooving tool for the inner annular groove set of casing silicone according to claim 4, wherein an effective cutting length L of the cutting edge (23) is 5 mm.
6. The grooving tool for the inner annular groove set of the cartridge receiver silica gel according to claim 5, wherein a width D of the cutting edge (23) is equal to a groove width + (0.05-0.1).
7. The grooving tool for the inner annular groove set of casing silicone according to claim 6, wherein the non-cutting and cutting areas of the cutting edge (23) are adapted by a convex arc, and the convex arc adapting angle θ is greater than or equal to 120 °.
8. The grooving tool for the cartridge silicon inner ring groove set according to any one of claims 2 to 7, wherein an end face of the turning tool body (10) and the turning tool blade (20) are connected by high frequency silver soldering.
9. A method for processing a grooving cutter for a cartridge receiver silicone inner ring groove set, which is characterized in that the grooving cutter for the cartridge receiver silicone inner ring groove set of claim 2 is adopted, and comprises the following steps:
s1: the grooving tool is mounted, an upper cutting edge is used for tool setting, and the grooving tool is knocked and aligned through layout in the tool setting process;
s2: executing a numerical control program, turning four annular grooves below the annular groove group by multiple times of feeding, and removing cuttings attached to the blade after retracting the cutter;
s3: executing a numerical control program, turning four ring grooves in the ring groove group by multiple times of feeding, and removing chips attached to the blade after retracting;
s4: and executing a numerical control program, turning four ring grooves on the ring groove group by multiple times of feeding, and removing cuttings attached to the blade after the cutter is withdrawn to finish machining.
10. The method for processing the slot turning tool for the cartridge receiver silicone inner ring slot set according to claim 7, wherein in step S1, a rubber hammer or a wood hammer is used for striking; in the steps S2-S4, the feed is divided into three times, and the feed amounts are respectively: 1.6mm, 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111152634.5A CN113751740A (en) | 2021-09-29 | 2021-09-29 | Grooving cutter for silicon rubber inner ring groove group of case and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111152634.5A CN113751740A (en) | 2021-09-29 | 2021-09-29 | Grooving cutter for silicon rubber inner ring groove group of case and machining method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113751740A true CN113751740A (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111152634.5A Pending CN113751740A (en) | 2021-09-29 | 2021-09-29 | Grooving cutter for silicon rubber inner ring groove group of case and machining method thereof |
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| Country | Link |
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| CN (1) | CN113751740A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056087A (en) * | 2022-06-07 | 2022-09-16 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
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| US3825981A (en) * | 1972-11-13 | 1974-07-30 | Warner Swasey Co | Cartridge-type cutoff and grooving tool |
| CN103273098A (en) * | 2013-05-17 | 2013-09-04 | 苏州创丰精密五金有限公司 | Multiple-groove forming knife |
| CN104070195A (en) * | 2014-06-25 | 2014-10-01 | 苏州创丰精密五金有限公司 | Eight-groove belt pulley forming knife |
| CN207447375U (en) * | 2017-03-06 | 2018-06-05 | 上海启发电子科技有限公司 | A kind of new grooving cutter |
| CN108526500A (en) * | 2017-03-06 | 2018-09-14 | 上海启发电子科技有限公司 | A kind of novel grooving cutter |
| CN108687841A (en) * | 2017-03-31 | 2018-10-23 | 罗门哈斯电子材料Cmp控股股份有限公司 | Tool is reduced in gelling for chemical-mechanical planarization polishing pad |
| CN211248375U (en) * | 2019-12-07 | 2020-08-14 | 东莞吉鑫五金科技有限公司 | Multi-tooth grooving blade |
-
2021
- 2021-09-29 CN CN202111152634.5A patent/CN113751740A/en active Pending
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|---|---|---|---|---|
| US3825981A (en) * | 1972-11-13 | 1974-07-30 | Warner Swasey Co | Cartridge-type cutoff and grooving tool |
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| Title |
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| 中国轻工总会: "《轻工业技术装备手册 第5卷》", 31 January 1998, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115056087A (en) * | 2022-06-07 | 2022-09-16 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
| CN115056087B (en) * | 2022-06-07 | 2023-07-18 | 中国航发航空科技股份有限公司 | Method for precisely machining silicon rubber inner ring groove group |
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Application publication date: 20211207 |