CN112025535B - Abrasive flow finishing device for multi-blade grid part - Google Patents
Abrasive flow finishing device for multi-blade grid part Download PDFInfo
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- CN112025535B CN112025535B CN202010732667.6A CN202010732667A CN112025535B CN 112025535 B CN112025535 B CN 112025535B CN 202010732667 A CN202010732667 A CN 202010732667A CN 112025535 B CN112025535 B CN 112025535B
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- cover plate
- blade
- guide vane
- blades
- abrasive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
- B24B31/116—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work using plastically deformable grinding compound, moved relatively to the workpiece under the influence of pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses an abrasive particle flow finishing device for a multi-blade grid part. Consists of an upper cover plate, a lower cover plate, an upper support body, a lower support body, an upper support sleeve, a lower support sleeve, an upper flow deflector and a lower flow deflector. Because the abrasive flow processing of the multi-blade grid structure part is reciprocating processing, the upper cover plate, the upper supporting body, the lower cover plate and the lower supporting body are arranged to be symmetrical structures, and the sizes of the upper flow deflector and the lower flow deflector are completely consistent except that the diameters of the central through holes are different. A processed multi-blade grid part is arranged between the upper structure and the lower structure. A circular channel is arranged in the center of the cover plate; each support body consists of 5 identical cylinders and is matched with the corresponding cover plate and the corresponding flow deflector; the number of the splitter blades in the circumferential direction of the guide vane is the same as that of the blades of the multi-blade cascade part, and the splitter blades and the blades of the cascade part keep the same trend angle; the upper and lower supporting sleeves are matched with the cover plate to bear the clamping pressure during machining, so that the stability of the internal parts and the structures of all parts is protected.
Description
Technical Field
The invention relates to a multi-blade grid part abrasive flow finishing device, which is used for finishing the surface of a blade of a multi-blade grid part and belongs to the technical field of surface finishing of metal parts.
Background
The multi-blade cascade structural part is formed by dozens of blades which are generally processed by electric spark or electrolysis, the blades of the blade cascade are bent into a crescent shape, and the shapes of blade tips at two sides of the blades are the same and are also different. The multi-blade cascade structure part is generally used as a core rotating part of a liquid rocket engine turbopump, the surface of a blade flow channel must reach certain surface roughness, and the surface is smooth and has no bulge, but the surface quality of the blade formed by electric spark or electrolysis cannot meet the requirement of direct use at present. The conventional polishing method used at present is manual polishing, and the gap between blades is too small, so that the manual polishing has many limitations and can not ensure the uniform polishing of all positions of a flow channel.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the grinding particle flow finishing processing device for the multi-blade grating part is provided, and the aim of reducing the surface roughness of a flow passage is fulfilled by finishing the blades of the multi-blade grating part.
The technical solution of the invention is as follows:
a multi-blade abrasive flow finishing device for parts comprises: the upper support body is arranged on the upper cover plate;
the lower flow deflector is connected with the lower cover plate through a lower support body and is positioned below the multi-blade grid part to be processed, and the upper flow deflector is connected with the upper cover plate through an upper support body and is positioned above the multi-blade grid part to be processed; the multi-grid part to be processed is fixed between the upper guide vane and the lower guide vane;
the upper support sleeve and the lower support sleeve are connected in a matching way and then assembled between the upper cover plate and the lower cover plate to form a barrel-shaped side wall of the whole processing device;
the abrasive material channels are arranged at the center of the upper cover plate and the center of the lower cover plate, abrasive materials enter the cavity from the abrasive material channels, the upper guide vane and the lower guide vane guide the flow of the abrasive materials in the direction of the flow channel between the blades of the multi-blade grid part, and all parts of the blades of the multi-blade grid part are uniformly polished.
Furthermore, the upper cover plate, the lower cover plate, the upper support sleeve and the lower support sleeve are matched, so that the whole processing device is of a closed structure, and only the abrasive material channel arranged at the center of the upper cover plate and the abrasive material channel arranged at the center of the lower cover plate are reserved.
Furthermore, the vanes of the multi-vane part are crescent.
Furthermore, the upper supporting body and the lower supporting body are the same in structure and are composed of a plurality of cylinders, and the cylinders are uniformly distributed along the circumferential direction.
Furthermore, a plurality of same blind holes are uniformly distributed in the circumferential direction of the upper flow deflector and are matched with a plurality of cylinders of the upper support body, and the other ends of the plurality of cylinders of the upper support body are matched with a plurality of blind holes arranged on the upper cover plate so as to be used as a force bearing structure for supporting and keeping the cascade static; the matching of the lower flow deflector, the lower supporter and the lower cover plate is the same.
Furthermore, the upper guide vane and the lower guide vane are used as guide devices for abrasive flow in abrasive flow processing of the cascade vanes, the number of the splitter vanes in the circumferential direction is the same as that of the processed multi-cascade part vanes, and the widths of the upper guide vane, the lower guide vane and the multi-cascade part vanes are also the same; the upper guide vane, the lower guide vane and the blades of the multi-blade grid part keep the same trend angle.
Furthermore, the inclination angles of the upper guide vane and the lower guide vane are respectively the same as the inclination angles of the blade tips at the two sides of the multi-blade grid part blade, and the inclination angles of the upper guide vane and the lower guide vane can be adjusted along with the different inclination angles of the blade tips of the multi-blade grid part blade.
Furthermore, the same clearance exists between the blades of the upper guide vane and the lower guide vane and the blades of the multi-blade grid part, and the size of the clearance is 3mm-6 mm.
Further, the whole processing device is provided with the following equipment sequences: the lower cover plate is placed on the abrasive flow equipment workbench, five parts of the lower support body are inserted into the hole of the lower cover plate, the other end of the lower support body is matched with the hole of the lower flow deflector, after the lower support sleeve is matched with the lower cover plate, the multi-blade grid part is placed on the lower flow deflector, and the upper flow deflector, the upper support body, the upper support sleeve and the upper cover plate are assembled in sequence.
Furthermore, the outer contour diameters of the upper cover plate, the lower cover plate, the upper supporting sleeve and the lower supporting sleeve are the same; the inner diameter of the upper support sleeve and the inner diameter of the lower support sleeve are the same as the contour outer diameter of the multi-blade grid part.
The invention has the technical effects that:
(1) the invention uses the support body (5 long and thin cylinders) as the supporting and bearing structure of the multi-blade grid part, replaces the conventional structure for filling the inner space, has light weight and convenient operation, and is not limited by the size of the abrasive cylinder of the abrasive flow equipment because the center of the cover plate is provided with the abrasive flow channel. On the other hand, the length of the supporting body can be adaptively adjusted according to the lengths of the shafts at the two ends of the blade cascade;
(2) the number of the blades of the upper and lower flow deflectors is the same as that of the blades of the blade grid, and the inclination angles of the blades are respectively the same as the inclination angles of the blade tips on two sides of the blade grid, so that the abrasive is guided to flow into the flow channel between the blades of the blade grid, and the part exposed out of the flow channel between the blades becomes a part of a processed flow area, and the arrangement is favorable for uniformly polishing the surfaces of the blades.
(3) The blade of the guide vane and the blade grid blade of the invention have a clearance of 3-6mm, and the purpose is two: firstly, abrasive is deposited in gaps to form new contact with the blade grid blades, and the flowing scouring force of the abrasive is utilized to enable the abrasive to form new flow guide sections, so that all parts of the blades are polished more uniformly; secondly, the shapes of the blades of the guide vane and the blade grid blades are different, the blades are difficult to be completely sealed when in contact, if the blades are in contact, the abrasive material passes through the position which is not completely sealed, local over-polishing is easy to cause, and if the gap is too large, the arrangement of the guide vane is weakened to lose the effect.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a sectional view of the present invention.
Detailed Description
The invention is described in detail below with reference to figures 1 and 2.
The abrasive flow processing technology is used as a flexible surface finishing processing method, and has unique advantages for the surface finishing of the narrow flow passage of the multi-blade grid part. Based on the characteristics, the invention provides an abrasive particle flow finishing device for a multi-blade grid part.
The multi-blade grid part 4 to be processed is disc-shaped, a circle of blades are arranged along the circumference, the blades are bent into a crescent shape, and the shapes of blade tips on two sides of the blades are the same and different. The multi-blade cascade structure part is generally used as a core rotating part of a liquid rocket engine turbopump, the surface of a blade flow channel must reach certain surface roughness, and the surface is smooth and has no bulge, but the surface quality of the blade manufactured by the existing common electric spark or electrolytic forming process cannot meet the requirement of direct use. Due to the fact that the blade gap is too small, the conventional polishing method used at present is manual polishing which has many limitations and cannot guarantee uniform polishing of all positions of a flow channel.
As shown in fig. 1 and 2, the abrasive grain flow finishing device for a multi-blade grid part comprises: the device comprises an upper cover plate 1, an upper support body 2, an upper flow deflector 3, a lower flow deflector 5, a lower support body 6, a lower cover plate 7, an upper support sleeve 8 and a lower support sleeve 9;
the lower guide vane 5 is connected with a lower cover plate 7 through a lower support body 6 and is positioned below the multi-blade grid part 4 to be processed, and the upper guide vane 3 is connected with the upper cover plate 1 through an upper support body 2 and is positioned above the multi-blade grid part 4 to be processed; a multi-grid part 4 to be processed is fixed between the upper guide vane 3 and the lower guide vane 5;
the upper supporting sleeve 8 and the lower supporting sleeve 9 are connected in a matching way and then are assembled between the upper cover plate 1 and the lower cover plate 7 to form a barrel-shaped side wall of the finishing device;
the center of the upper cover plate 1 is provided with a feeding hole, the center of the lower cover plate 7 is provided with a discharging hole, the grinding material enters the cavity from the feeding hole, the upper flow deflector 3 and the lower flow deflector 5 conduct flow guiding, the grinding material is guided to flow into the direction of a flow passage between the blades of the multi-blade grid part 4, and all parts of the blades of the multi-blade grid part 4 are uniformly polished.
Because the abrasive flow processing of the multi-blade grid structure part is reciprocating processing, the upper cover plate, the upper supporting body, the lower cover plate and the lower supporting body are arranged to be symmetrical structures, and the sizes of the upper flow deflector and the lower flow deflector are completely consistent except that the diameters of the central through holes are different. The material inlet and outlet openings arranged on the upper cover plate 1 and the lower cover plate 7 are not pure material feeding or discharging actually, and can be regarded as abrasive material channels.
The outer contour diameters of the upper cover plate 1, the lower cover plate 7, the upper supporting sleeve 8 and the lower supporting sleeve 9 are the same; the inner diameter of the upper support sleeve 8 and the inner diameter of the lower support sleeve 9 are the same as the contour outer diameter of the multi-blade grid part 4. The upper cover plate 1, the lower cover plate 7, the upper supporting sleeve 8 and the lower supporting sleeve 9 are matched, so that the whole processing device is of a closed structure, and only a feeding hole arranged at the center of the upper cover plate 1 and a discharging hole arranged at the center of the lower cover plate 7 are reserved.
The upper supporting body 2 and the lower supporting body 6 are identical in structure and composed of a plurality of cylinders, and the cylinders are uniformly distributed along the circumferential direction. A plurality of same blind holes are uniformly distributed in the circumferential direction of the upper flow deflector 3 and are matched with a plurality of cylinders of the upper support body 2, and the other ends of the plurality of cylinders of the upper support body 2 are matched with a plurality of blind holes arranged on the upper cover plate 1 so as to be used as a force bearing structure for supporting and keeping the cascade static; the matching of the lower guide vane 5, the lower supporter 6 and the lower cover plate 7 is the same.
The upper guide vane 3 and the lower guide vane 5 are used as a guide device for the flow of the grinding material in the abrasive flow processing of the cascade vanes, the number of the splitter vanes in the circumferential direction is the same as that of the processed multi-cascade part 4, and the widths of the upper guide vane 3, the lower guide vane 5 and the multi-cascade part 4 are also the same; the upper guide vane 3, the lower guide vane 5 and the blades of the multi-blade grid part 4 keep the same trend angle.
Specifically, the inclination angles of the upper guide vane 3 and the lower guide vane 5 are respectively the same as the inclination angles of the blade tips at two sides of the blade of the multi-blade grid part 4, and the inclination angles of the upper guide vane 3 and the lower guide vane 5 are adjustable along with the difference of the inclination angles of the blade tips of the blade of the multi-blade grid part 4.
The number of the blades of the upper and lower flow deflectors is the same as that of the blades of the blade grid, and the inclination angles of the blades are respectively the same as the inclination angles of the blade tips on two sides of the blade grid, so that the abrasive is guided to flow into the flow channel between the blades of the blade grid, and the part exposed out of the flow channel between the blades becomes a part of a processed flow area, and the arrangement is favorable for uniformly polishing the surfaces of the blades.
The same clearance exists between the blades of the upper guide vane 3 and the lower guide vane 5 and the blades of the multi-blade grid part 4, and the size of the clearance is 3mm-6 mm.
Setting up the clearance like this has special technological effect: firstly, abrasive is deposited in gaps to form new contact with the blade grid blades, and the flowing scouring force of the abrasive is utilized to enable the abrasive to form new flow guide sections, so that all parts of the blades are polished more uniformly; secondly, the shapes of the blades of the guide vane and the blade grid blades are different, the blades are difficult to be completely sealed when in contact, if no proper gap is set to be in contact, the abrasive material passes through the position which is not completely sealed, local over-polishing is easily caused, and if the gap is too large, the arrangement of the guide vane is weakened to lose the effect.
The equipment sequence of the whole processing device provided by the invention is as follows: the lower cover plate 7 is placed on a workbench of abrasive flow equipment, five parts of the lower support body 6 are inserted into holes of the lower cover plate, the other end of the lower support body 6 is matched with holes of the lower flow deflector 5, after the lower support sleeve 9 is matched with the lower cover plate 7, the multi-blade grid part 4 is placed on the lower flow deflector 5, and the upper flow deflector 3, the upper support body 2, the upper support sleeve 8 and the upper cover plate 1 are assembled in sequence.
The examples of the invention are given below:
the embodiment of the invention relates to a multi-blade cascade part abrasive flow finishing device, which is used for finishing the surface of a blade of a multi-blade cascade part and belongs to the technical field of surface finishing of metal parts.
As a core rotating part of a turbo pump of a liquid rocket engine, a multi-blade cascade structural part comprises up to tens of blades, and is formed by electric spark or electrolytic machining, the blades of the blade cascade are bent into a crescent shape, and the blade tips at two sides of each blade are identical in shape, as shown in figure 1.
The abrasive flow finishing device for the multi-blade grid part comprises an upper cover plate 1, an upper support body 2, an upper flow deflector 3, a lower flow deflector 5, a lower support body 6, a lower cover plate 7, an upper support sleeve 8 and a lower support sleeve 9;
the lower guide vane 5 is connected with a lower cover plate 7 through a lower support body 6 and is positioned below the multi-blade grid part 4 to be processed, and the upper guide vane 3 is connected with the upper cover plate 1 through an upper support body 2 and is positioned above the multi-blade grid part 4 to be processed; a multi-grid part 4 to be processed is fixed between the upper guide vane 3 and the lower guide vane 5;
the upper supporting sleeve 8 and the lower supporting sleeve 9 are connected in a matching way and then are assembled between the upper cover plate 1 and the lower cover plate 7 to form a barrel-shaped side wall of the finishing device;
the center of the upper cover plate 1 is provided with a feeding hole, the center of the lower cover plate 7 is provided with a discharging hole, the grinding material enters the cavity from the feeding hole, the upper flow deflector 3 and the lower flow deflector 5 conduct flow guiding, the grinding material is guided to flow into the direction of a flow passage between the blades of the multi-blade grid part 4, and all parts of the blades of the multi-blade grid part 4 are uniformly polished.
In the embodiment, the upper and lower supporting bodies are respectively composed of 5 long and thin cylinders to serve as a supporting and force bearing structure of the multi-blade grid part, the structure that the inner space is filled conventionally is replaced, the weight is light, the operation is convenient, and a material inlet and a material outlet of a channel for flowing abrasive are arranged in the centers of the upper and lower cover plates and are not limited by the size of an abrasive cylinder of abrasive flow equipment. On the other hand, the length of the supporting body can be adaptively adjusted according to the lengths of the shafts at the two ends of the blade cascade;
the outer contour diameter phi of the upper cover plate, the lower cover plate, the upper support sleeve and the lower support sleeve is 220mm, and the upper cover plate, the lower cover plate, the upper support sleeve and the lower support sleeve are mutually matched to form a pressure-bearing structure of the abrasive flow finishing device for the multi-blade cascade parts. The inner diameter of the supporting sleeve is the same as the outline outer diameter of the multi-grid part. The centers of the upper cover plate and the lower cover plate are provided with a grinding material channel with phi of 75mm, and the surface of the cover plate is uniformly provided with 5 holes matched with the supporting body. Five holes matched with the supporting body are uniformly distributed on the surface of one side of the upper flow deflector 3 and the lower flow deflector 5.
The lower cover plate 7 is placed on a workbench of abrasive flow equipment, five parts of the lower support body 6 are inserted into holes of the lower cover plate, the other end of the lower support body 6 is matched with holes of the lower flow deflector 5, after the lower support sleeve 9 is matched with the lower cover plate 7, the multi-blade grid part is placed on the lower flow deflector 5, and the upper flow deflector 3, the upper support body 2, the upper support sleeve 8 and the upper cover plate 1 are assembled in sequence. The assembled device is placed in a machining position of equipment, abrasive flow machining is started after the equipment is clamped, and uniform grinding of blades of multi-blade grid parts can be achieved.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (5)
1. A multi-blade grating part abrasive flow finishing processing device is characterized by comprising: the device comprises an upper cover plate (1), an upper support body (2), an upper flow deflector (3), a lower flow deflector (5), a lower support body (6), a lower cover plate (7), an upper support sleeve (8) and a lower support sleeve (9);
the lower guide vane (5) is connected with the lower cover plate (7) through a lower support body (6) and is positioned below the multi-blade grid part (4) to be processed, and the upper guide vane (3) is connected with the upper cover plate (1) through an upper support body (2) and is positioned above the multi-blade grid part (4) to be processed; a multi-grid part (4) to be processed is fixed between the upper guide vane (3) and the lower guide vane (5);
the upper supporting sleeve (8) and the lower supporting sleeve (9) are connected in a matching way and then are assembled between the upper cover plate (1) and the lower cover plate (7) to form a barrel-shaped side wall of the finishing device;
abrasive passages are respectively arranged at the center of the upper cover plate (1) and the center of the lower cover plate (7), abrasive enters the cavity from the abrasive passages, the upper guide vane (3) and the lower guide vane (5) guide flow, the abrasive is guided to flow into the direction of flow passages among the blades of the multi-grid part (4), and all parts of the blades of the multi-grid part (4) are uniformly polished;
the upper support body (2) and the lower support body (6) are identical in structure and both consist of a plurality of cylinders, and the cylinders are uniformly distributed along the circumferential direction;
a plurality of same blind holes are uniformly distributed in the circumferential direction of the upper flow deflector (3) and are matched with a plurality of cylinders of the upper supporting body (2), and the other ends of the plurality of cylinders of the upper supporting body (2) are matched with a plurality of blind holes arranged on the upper cover plate (1) to be used as a bearing structure for supporting and keeping the multi-blade grid part (4) static; the matching of the lower flow deflector (5), the lower support body (6) and the lower cover plate (7) is the same as that of the lower flow deflector;
the upper guide vane (3) and the lower guide vane (5) are used as a guide device for abrasive flowing in abrasive flow processing of the blades of the multi-blade grid part (4), the number of the splitter blades in the circumferential direction is the same as that of the blades of the processed multi-blade grid part (4), and the widths of the blades of the upper guide vane (3), the lower guide vane (5) and the multi-blade grid part (4) are also the same; the upper guide vane (3), the lower guide vane (5) and the blades of the multi-blade grid part (4) keep the same trend angle;
the inclination angles of the blades of the upper guide vane (3) and the lower guide vane (5) are respectively the same as the inclination angles of the blade tips at two sides of the blade of the multi-blade grid part (4), and the inclination angles of the blades of the upper guide vane (3) and the lower guide vane (5) can be adjusted along with the difference of the inclination angles of the blade tips of the blades of the multi-blade grid part (4);
the same clearance exists between the blades of the upper guide vane (3) and the lower guide vane (5) and the blades of the multi-blade grid part (4), and the size of the clearance is 3mm-6 mm.
2. The multi-blade abrasive finishing device of claim 1, wherein: the upper cover plate (1), the lower cover plate (7), the upper supporting sleeve (8) and the lower supporting sleeve (9) are matched, so that the finishing processing device is of a closed structure, and only the abrasive material channel arranged at the center of the upper cover plate (1) and the center of the lower cover plate (7) is reserved.
3. The multi-blade abrasive finishing device of claim 1, wherein: the vanes of the multi-vane grid part (4) are crescent.
4. The multi-blade abrasive finishing device of claim 1, wherein: the equipment sequence of the finishing processing device is as follows: the lower cover plate (7) is placed on a workbench of abrasive flow equipment, five parts of a lower support body (6) are inserted into a hole of the lower cover plate, the other end of the lower support body (6) is matched with a hole of a lower flow deflector (5), after a lower support sleeve (9) is matched with the lower cover plate (7), a multi-blade grid part (4) is placed on the lower flow deflector (5), and an upper flow deflector (3), an upper support body (2), an upper support sleeve (8) and an upper cover plate (1) are assembled in sequence.
5. The multi-blade abrasive finishing device of claim 1, wherein: the outer contour diameters of the upper cover plate (1), the lower cover plate (7), the upper supporting sleeve (8) and the lower supporting sleeve (9) are the same; the inner diameter of the upper support sleeve (8) and the inner diameter of the lower support sleeve (9) are the same as the contour outer diameter of the multi-blade grid part (4).
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| CN202010732667.6A CN112025535B (en) | 2020-07-27 | 2020-07-27 | Abrasive flow finishing device for multi-blade grid part |
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| CN113649658A (en) * | 2021-09-10 | 2021-11-16 | 南京航空航天大学 | Electric spark and abrasive flow combined machining method for working blade of gas compressor |
| CN114161309B (en) * | 2021-11-23 | 2022-10-21 | 西安航天发动机有限公司 | Abrasive particle flow finishing device with shroud blade disc |
| CN115229616A (en) * | 2022-07-29 | 2022-10-25 | 梁永伟 | Water pump fan blade maintenance equipment |
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| CN108326725A (en) * | 2017-12-28 | 2018-07-27 | 西安航天发动机有限公司 | A kind of 3D printing double shrouded wheel abrasive Flow finishing processing device |
| CN108326724A (en) * | 2017-12-28 | 2018-07-27 | 西安航天发动机有限公司 | A kind of 3D printing air turbine shell abrasive Flow finishing processing device |
| CN109015365A (en) * | 2018-07-25 | 2018-12-18 | 成都飞机工业（集团）有限责任公司 | A kind of abrasive flow machining grid group hole special fixture |
| CN109676525A (en) * | 2019-01-07 | 2019-04-26 | 南京航空航天大学 | A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture |
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