CN109676525A - A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture - Google Patents

A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture Download PDF

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Publication number
CN109676525A
CN109676525A CN201910013292.5A CN201910013292A CN109676525A CN 109676525 A CN109676525 A CN 109676525A CN 201910013292 A CN201910013292 A CN 201910013292A CN 109676525 A CN109676525 A CN 109676525A
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China
Prior art keywords
impeller
fixture
base
abrasive
support ring
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CN201910013292.5A
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CN109676525B (en
Inventor
孙玉利
赵路
柯泰龙
汤张喆
卢文壮
左敦稳
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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

A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture, it is characterized in that it includes: fixture base (1), fixture outer support ring (2), fixture inside support ring (3), fixture cover (4), supporting block (5), impeller pedestal (6), sealing ring (7), impeller upper cover (8), impeller sleeve (9), threaded rod (10), the fixture and impeller (11) form closed flow after the assembly is completed, abrasive material is moved back and forth from closed flow, i.e. processable impeller inner flow passage, the present invention provides a set of rationally available fixture to reduce impeller Complex Different Shape channel surface roughness with abrasive Flow, fixture design is reasonable, structure is simple, effect is obvious.

Description

A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture
Technical field
The present invention relates to a kind of compressor impeller processing technologies, especially a kind of to process impeller using abrasive flow machining equipment The technology of inner cavity, specifically a kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture.
Background technique
There is a large amount of impeller in various compressor drum, due to complex-shaped, after printing by 3D technology, surface can lead to It crosses traditional abrasive polishing method and realizes surface finishing, but the most important position of impeller-inside complicated water runner is difficult to biography System mode carries out skin processing, since the smooth degree of inner flow passage directly affects the performance of compressor, so being badly in need of a kind of effective Method realize inner chamber body surface roughness reduction.Abrasive grain Flow Technique is a kind of novel mechanical processing method, it is by allowing Soft elastic grinding material flows through the reduction surface roughness operation that the surface for needing to process carries out deburring under the effect of the pressure, especially It is suitble to this part with complicated inner hole runner.
The one of key factor of abrasive Flow Machining is to carry out the design of corresponding fixture, good fixture may be implemented efficiency and The dual raising of effect.
Summary of the invention
The purpose of the present invention is process not for existing various compressor drum impeller inner hole complicated water runner surface accurate Just the problem of, designs a set of reasonable, readily available impeller complexity inner flow passage abrasive Flow skin processing special fixture, to realize Impeller surface is protected not to be destroyed while inside workpiece runner skin processing.
The technical scheme is that
A kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture, which is characterized in that it includes: fixture base 1, fixture Outer support ring 2, fixture inside support ring 3, fixture cover 4, supporting block 5, impeller pedestal 6, sealing ring 7, impeller upper cover 8, impeller set Cylinder 9, threaded rod 10, fixture base 1 are placed under abrasive Flow Machining extra bed on abrasive material cylinder working platform, and 6 bottom of impeller pedestal has three There are corresponding three grooves on a groove, 1 surface of fixture base, are fitted close by supporting block 5 and impeller pedestal 6, and impeller 11 is put It sets on impeller pedestal 6, impeller upper cover 8 and impeller sleeve 9 are placed sequentially on impeller 11, and threaded rod 10 passes through 11 mesoporous of impeller With 6 middle part threaded hole threaded engagement of impeller pedestal, to realize that impeller 11 is fixed on impeller pedestal 6,2 He of fixture outer support ring Fixture inside support ring 3 is placed in 1 upper groove of fixture base, and 4 lower surface of fixture cover is fluted and fixture outer support ring 2 is matched It closes, after integral clamp assembly completely, abrasive material is squeezed into 1 base holes of fixture base from lower abrasive material cylinder, flows through leaf along closed runner Wheel 11 needs the inner hole processed, and enters upper abrasive material cylinder from 5 aperture of fixture cover, in down stroke, abrasive material is squeezed into from upper abrasive material cylinder 11 inner hole of impeller enters lower abrasive material cylinder, and so on, achievees the effect that process impeller inner hole.After integral clamp assembly completely, mill Material is squeezed into 1 base holes of fixture base from lower abrasive material cylinder, the inner hole that impeller 11 needs to process is flowed through along closed runner, from fixture 5 aperture of upper cover enters upper abrasive material cylinder, and in down stroke, abrasive material squeezes into 11 inner hole of impeller into lower abrasive material cylinder, such as from upper abrasive material cylinder This is reciprocal, achievees the effect that process impeller inner hole.
The fixture base 1 is 45 steel discs, and center has a through-hole to pass in and out for abrasive material, has 2 depth on surface Identical circular groove is used for stationary fixture outer support ring 2 and fixture inside support ring 3, and in setting in through-hole one week, there are three uniformly distributed Deep trouth cooperates for placing supporting block 5 and impeller pedestal 6, to realize the picking-up and fixation of impeller pedestal 6.
The fixture outer support ring 2 and fixture inside support ring 3 is ring-type, and there are two identical for design in fixture base 1 Depth annular groove, fixture outer support ring 2 and fixture inside support ring 3 are individually positioned in outside and inside, fixture inside support ring 3 and folder Have 1 contact surface of pedestal and place silica gel piece, can use pressure and fill up gap, abrasive material is avoided to enter fixture outer support ring 2 and fixture In gap between inside support ring 3, fixture inside support ring 3 is for constraining runner, to reduce cavity volume, improves abrasive material and utilizes Rate, fixture outer support ring 2 are used to support fixture cover 4, to avoid clamp body unbalance stress and be destroyed.
When the fixture outer support ring 2 and fixture base 1 and fixture cover 4 cooperate, fixture base 1 and fixture cover 4 Surface is equipped with groove, to realize the circumferential registration to fixture outer support ring 2.
6 bottom of impeller pedestal is nylon rounding disk, and nylon material can protect workpiece lower surface not damaged by fixture, 6 upper surface center of impeller pedestal have step circles for and workpiece lower surface be matched for clamping tightly, there is a threaded hole at 6 center of impeller pedestal, For cooperating fixed impeller 11 with threaded rod 10,6 upper surface circumferential section of impeller pedestal has on boss annulus for placing sealing Circle 7, playing sealing function prevents abrasive material to be embedded in, and 6 bottom surface of impeller pedestal is uniformly distributed three grooves and is used to support the connection of block 5, from And impeller pedestal 6 is fixed in fixture base 1.
The sealing ring 7 is placed in the groove of the design of impeller pedestal 6, so that impeller 11 is compressed sealing ring 7 by pressure Flexible deformation is generated, to realize that wheel bottom is isolated with external world's abrasive material, protects the wheel bottom not by abrasive material erosion.
The impeller upper cover 8 is nylon material product, and lower surface and 11 upper surface of impeller are all that cambered surface is fitted close, Nylon material can reduce the damage of 11 upper surface of impeller, and 8 surrounding of impeller upper cover has annulus to coat impeller 11, protects special characteristic not It is damaged, is fitted close by lathe pressure and fixture cover 4 and impeller 11.
The impeller sleeve 9 is that nylon system is cyclic annular, is sleeved on upper impeller, can protect top rapid wear face avoid with Outer clamp body directly contacts, and in experiment, impeller sleeve 9 and impeller interface are sealed using paraffin, avoid little particle abrasive grain into Enter and destroys 11 machined surface of impeller in impeller 11 and 9 gap of impeller sleeve.
10 bottom end of threaded rod is equipped with screw thread, for cooperating with 6 screwed hole of centre of impeller pedestal, spiral shell after cooperating completely Rasp bar upper end and 11 screwed hole of centre of impeller compress, and can protect the threaded hole processed, avoid its damage by abrasive material.
Beneficial effects of the present invention:
The present invention provides a set of rationally available built-up jig for impeller complexity inner flow passage abrasive flow machining.
Fixture base 1 of the invention, fixture outer support ring 2, fixture inside support ring 3, fixture cover 4, supporting block 5, impeller Pedestal 6, sealing ring 7, impeller upper cover 8, impeller sleeve 9, threaded rod 10 and 11 overall co-ordination of impeller at a closed runner, with Abrasive-flow processing machine tool cooperates the multiple processing that can be moved in circles up and down, is guaranteeing impeller inner flow passage skin processing quality On the basis of, improve the utilization efficiency and processing efficiency of abrasive material.
Detailed description of the invention
Fig. 1 impeller workpiece three dimensional sectional view.
Impeller complexity inner flow passage abrasive Flow skin processing special fixture installation diagram Fig. 2 of the invention.
Fig. 3 impeller base schematic diagram.
Fig. 4 threaded rod schematic diagram.
Fig. 5 impeller upper cover schematic diagram.
Fig. 6 fixture base schematic diagram.
Fig. 7 fixture cover schematic diagram.
Fig. 8 fixture outer support ring schematic diagram.
Fig. 9 fixture inside support ring schematic diagram.
Figure 10 supporting block schematic diagram.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As Figure 1-10 shows.
The three-dimensional of a kind of impeller complexity inner flow passage abrasive Flow skin processing special fixture, the compressor impeller of the present embodiment is outer Shape as shown in Figure 1, entire special fixture include: fixture base 1, fixture outer support ring 2, fixture inside support ring 3, fixture cover 4, Supporting block 5, impeller pedestal 6, sealing ring 7, impeller upper cover 8, impeller sleeve 9, threaded rod 10, fixture base 1 are placed on abrasive Flow Process under extra bed on abrasive material cylinder working platform, 6 bottom of impeller pedestal there are three groove, 1 surface of fixture base have corresponding three it is recessed Slot is fitted close by supporting block 5 and impeller pedestal 6, and impeller 11 is placed on impeller pedestal 6, impeller upper cover 8 and impeller sleeve 9 are placed sequentially on impeller 11, and threaded rod 10 passes through 11 mesoporous of impeller and 6 middle part threaded hole threaded engagement of impeller pedestal, thus Realize that impeller 11 is fixed on impeller pedestal 6, fixture outer support ring 2 and fixture inside support ring 3 are placed on 1 upper groove of fixture base In, 4 lower surface of fixture cover is fluted and fixture outer support ring 2 cooperates, and after integral clamp assembly completely, abrasive material is from lower abrasive material cylinder Squeeze into 1 base holes of fixture base, flow through impeller 11 along closed runner and need the inner hole processed, from 5 aperture of fixture cover into Enter upper abrasive material cylinder, in down stroke, abrasive material is squeezed into 11 inner hole of impeller from upper abrasive material cylinder and and so on reached into lower abrasive material cylinder Process the effect of impeller inner hole.After integral clamp assembly completely, abrasive material is squeezed into 1 base holes of fixture base from lower abrasive material cylinder, edge Closed runner flow through impeller 11 and need the inner hole processed, enter upper abrasive material cylinder from 5 aperture of fixture cover, in down stroke, mill Material squeezes into 11 inner hole of impeller into lower abrasive material cylinder from upper abrasive material cylinder, and so on, achievees the effect that process impeller inner hole.Such as Fig. 2 Shown, a whole set of fixture is made of inside and outside two sleeve clamp, wherein outer clamp includes: fixture base 1(Fig. 6), fixture outer support ring 2(Fig. 8), fixture cover 4(Fig. 7).Interior fixture includes: fixture inside support ring 3(Fig. 9), impeller pedestal 6(Fig. 3), impeller upper cover 8 (Fig. 5), impeller sleeve 9, impeller threaded rod 10(Fig. 4).
Fixture base 1 is 45 steel discs, and center has a through-hole to pass in and out for abrasive material, has 2 circular grooves on surface, is used In stationary fixture outer support ring 2 and fixture inside support ring 3, in setting in through-hole one week, there are three uniformly distributed deep trouths, for placing figure The lower end of supporting block 5 shown in 10, the upper end of supporting block and impeller pedestal 6 cooperate, and are inserted into the slot of 6 lower part of impeller pedestal. Impeller pedestal 6(Fig. 3) it is nylon rounding disk, nylon material can protect workpiece (compressor impeller) lower surface not damaged by fixture, 6 upper surface center of impeller pedestal have step circles for and workpiece lower surface be matched for clamping tightly, there is a threaded hole at 6 center of impeller pedestal, For cooperating fixed impeller 11 with threaded rod 10, it is close to be machined with placement on the boss annulus of 6 upper surface circumferential section of impeller pedestal The groove of seal, playing the role of sealing prevents abrasive material to be embedded in, and 6 bottom surface of impeller pedestal is uniformly distributed three grooves and is used to support block 5 connections, so that impeller pedestal 6 is fixed in fixture base 1.Entire fixture passes through the cylinder pressure compaction of abrasive material up and down of lathe. First effect in fixture of threaded rod 10 is to screw cooperation by its bottom external screw thread and impeller pedestal 6, by workpiece (compressor Impeller) it is secured firmly on impeller pedestal 6, avoiding workpiece (compressor impeller), appearance position is moved in process, to not Finished surface is needed to cause to damage.Second effect, 10 top and bottom diameter of threaded rod is different, and the step ring that the two generates is revolving Next to compress the machined screw thread of impeller center, protection threaded hole avoids abrasive material from entering and destroys machined threaded hole.
When assembling jig, first supporting block 5 is put into three grooves of fixture base 1, correspondence is arranged at 6 bottom of impeller pedestal Three grooves be placed in three supporting blocks, to realize that impeller pedestal 6 is fixed, and sealing ring 7 is put on impeller pedestal 6, Impeller is placed on impeller pedestal 6, is screwed by threaded rod 10 and impeller is fixed on impeller pedestal 6, successively put on impeller Lid 8 and impeller sleeve 9 protect impeller upper surface, are put into fixture inside support ring 3 and fixture outer support ring 2 and fixture cover 4, whole Fixture is assembled and is finished.
The working principle of the invention:
Abrasive material is put into lower abrasive material cylinder before processing, the fixture assembled is integrally placed in lower abrasive material cylinder upper table, starter motor Bed molding, after setting machined parameters, abrasive material is squeezed into fixture inner cavity body from lower abrasive material cylinder by fixture base through-hole, along setting The runner counted enters from impeller aperture, is squeezed into upper abrasive material cylinder along helical flow path.In down stroke, abrasive material hole from impeller It squeezes into, enters lower abrasive material cylinder along runner, this is a complete stroke.After processing is completed, supersonic wave cleaning machine is put the workpiece in Cleaning then dries up excessive moisture using high pressure air rifle, measures inside surface roughness using roughness measuring instrument.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.

Claims (10)

1.一种叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，它包括：夹具底座（1）、夹具外支撑环（2）、夹具内支撑环（3）、夹具上盖（4）、支撑块（5）、叶轮底座（6）、密封圈（7）、叶轮上盖（8）、叶轮套筒（9）、螺纹杆（10），夹具底座（1）放置在磨粒流加工机床工作台上，叶轮底座（6）通过三个支撑块（5）固定于夹具底座（1）上，叶轮放置在叶轮底座（6）上，通过螺纹杆（10）穿过叶轮（11）中心孔和叶轮底座（6）中心螺纹孔螺旋连接，将叶轮固定在叶轮底座（6）上，同时密封避免磨料破坏叶轮（11）中心已加工的螺纹，叶轮上盖（8）和叶轮套筒（9）依次放置在叶轮（11）上，夹具底座（1）上有固定槽，夹具外支撑环（2）和夹具内支撑环（3）放置在夹具底座（1）固定槽上，夹具上盖（4）上有对应的固定槽装配在夹具外支撑环（2）和夹具内支撑环（3）上，整体夹具装配完全后，磨料从下磨料缸挤入夹具底座（1）底座孔中，沿着封闭流道流过叶轮（11）需要加工的内孔，从夹具上盖（4）小孔进入上磨料缸，在下行程中，磨料从上磨料缸挤入叶轮（11）内孔进入下磨料缸，如此往复，达到加工叶轮内孔的目的。1. A special fixture for abrasive grain streamer finishing of complex inner flow channel of impeller, characterized in that it comprises: fixture base (1), fixture outer support ring (2), fixture inner support ring (3), fixture upper cover ( 4), support block (5), impeller base (6), sealing ring (7), impeller upper cover (8), impeller sleeve (9), threaded rod (10), fixture base (1) placed on the abrasive grain On the workbench of the flow machining machine, the impeller base (6) is fixed on the fixture base (1) through three support blocks (5), the impeller is placed on the impeller base (6), and the impeller (11) is passed through the threaded rod (10). ) The central hole and the central threaded hole of the impeller base (6) are screwed together, and the impeller is fixed on the impeller base (6), and at the same time, the impeller is sealed to avoid abrasive damage to the central thread of the impeller (11), the upper cover of the impeller (8) and the impeller sleeve The cylinder (9) is placed on the impeller (11) in turn, the fixture base (1) has a fixing groove, the fixture outer support ring (2) and the fixture inner support ring (3) are placed on the fixture base (1) The fixing groove, the fixture There are corresponding fixing grooves on the upper cover (4) to be assembled on the outer support ring (2) of the fixture and the inner support ring (3) of the fixture. After the overall fixture is assembled completely, the abrasive is squeezed from the lower abrasive cylinder into the hole of the fixture base (1). , flows through the inner hole of the impeller (11) to be processed along the closed flow channel, and enters the upper abrasive cylinder from the small hole of the upper cover (4) of the fixture. During the down stroke, the abrasive is squeezed from the upper abrasive cylinder into the inner hole of the impeller (11). Enter the lower abrasive cylinder and reciprocate in this way to achieve the purpose of processing the inner hole of the impeller. 2.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的夹具底座（1）为45钢制圆盘，其中心有一通孔供磨料进出，在表面有2个深度相同圆形凹槽，用于固定夹具外支撑环（2）和夹具内支撑环（3），在通孔一周设置有三个均布的深槽，用于放置支撑块（5）以便与叶轮底座（6）配合，从而实现叶轮底座（6）的托起与固定。2. The special fixture for abrasive grain streamer finishing with complex inner flow channel of impeller according to claim 1, characterized in that, the fixture base (1) is a 45 steel disc, and there is a through hole in the center for the abrasive to enter and exit, There are 2 circular grooves with the same depth on the surface for fixing the outer support ring (2) of the fixture and the inner support ring (3) of the fixture, and three evenly distributed deep grooves are arranged around the through hole for placing the support block ( 5) In order to cooperate with the impeller base (6), so as to realize the holding and fixing of the impeller base (6). 3.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的夹具外支撑环（2）和夹具内支撑环（3）为环状，在夹具底座（1）上设计有两个相同深度环形槽，夹具外支撑环（2）和夹具内支撑环（3）分别放置在外侧和内侧环形槽中，夹具内支撑环（3）与夹具底座（1）接触面放置硅胶片，以利用压力填满空隙，避免磨料进入夹具外支撑环（2）和夹具内支撑环（3）之间的空隙中，夹具内支撑环（3）用于约束流道，从而减小空腔体积，提高磨料利用率，夹具外支撑环（2）用于支撑夹具上盖（4），从而避免夹具体受力不均而被破坏。3. The special fixture for abrasive grain streamer finishing of complex inner flow channels of an impeller according to claim 1, characterized in that the outer support ring (2) of the fixture and the inner support ring (3) of the fixture are annular, and the fixture is in the shape of a ring. The base (1) is designed with two annular grooves of the same depth. The outer support ring (2) of the clamp and the inner support ring (3) of the clamp are placed in the outer and inner annular grooves respectively. The inner support ring (3) of the clamp is connected to the base of the clamp ( 1) A silicone sheet is placed on the contact surface to fill the gap with pressure and prevent abrasives from entering the gap between the outer support ring (2) of the fixture and the inner support ring (3) of the fixture. The inner support ring (3) of the fixture is used to restrict the flow The outer support ring (2) of the clamp is used to support the upper cover (4) of the clamp, thereby preventing the clamp body from being damaged due to uneven force. 4.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的夹具外支撑环（2）与夹具底座（1）和夹具上盖（4）配合时，夹具底座（1）和夹具上盖（4）表面设有凹槽，从而实现对夹具外支撑环（2）的圆周定位。4. The special fixture for abrasive grain streamer finishing of the impeller complex inner flow channel according to claim 1, characterized in that the fixture outer support ring (2) cooperates with the fixture base (1) and the fixture upper cover (4) When the clamp base (1) and the clamp upper cover (4) are provided with grooves on the surface, the circumferential positioning of the outer support ring (2) of the clamp can be realized. 5.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的叶轮底座（6）底部为尼龙制圆盘，尼龙材质能保护工件下表面不被夹具损伤，叶轮底座（6）上表面中心有台阶圆用于和工件下表面配合夹紧，叶轮底座（6）中心有一螺纹孔，用于和螺纹杆（10）配合固定叶轮（11），叶轮底座（6）上表面圆周部分有用于放置密封圈（7）的凸台圆环，起到密封作用防止磨料嵌入，叶轮底座（6）底面均匀分布三个凹槽用于支撑块（5）的嵌入，从而将叶轮底座（6）固定在夹具底座（1）上。5. The special fixture for abrasive grain streamer finishing of complex inner flow channels of an impeller according to claim 1, wherein the bottom of the impeller base (6) is a nylon disc, and the nylon material can protect the lower surface of the workpiece from being damaged. The fixture is damaged. There is a stepped circle in the center of the upper surface of the impeller base (6) for clamping with the lower surface of the workpiece. There is a threaded hole in the center of the impeller base (6), which is used to cooperate with the threaded rod (10) to fix the impeller (11) and the impeller. The upper surface of the base (6) has a boss ring for placing the sealing ring (7), which acts as a seal to prevent the abrasive from being embedded. The bottom surface of the impeller base (6) is evenly distributed with three grooves for the support block (5). Snap in, thereby securing the impeller base (6) to the clamp base (1). 6.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的密封圈（7）放置在叶轮底座（6）设计的凹槽中，通过压力使叶轮（11）压紧密封圈（7）产生弹性变形，从而实现叶轮底部与外界磨料的隔离，保护叶轮底部不被磨料冲蚀。6. The special fixture for abrasive grain streamer finishing of the impeller complex inner flow channel according to claim 1, characterized in that, the sealing ring (7) is placed in the groove designed by the impeller base (6), and is made by pressure. The impeller (11) presses the sealing ring (7) to produce elastic deformation, thereby realizing the isolation of the bottom of the impeller from the external abrasive, and protecting the bottom of the impeller from being eroded by the abrasive. 7.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的叶轮上盖（8）为尼龙材质制品，叶轮上盖（8）下表面和叶轮（11）上表面皆为弧面紧密配合，尼龙材质可以减少叶轮（11）上表面损伤，叶轮上盖（8）四周有圆环包覆叶轮（11），保护特定特征不受破坏，通过机床压力与夹具上盖（4）和叶轮（11）紧密配合。7. The special fixture for abrasive flow finishing of complex inner flow channels of impellers according to claim 1, characterized in that the impeller upper cover (8) is made of nylon, and the lower surface of the impeller upper cover (8) and the impeller (11) The upper surfaces are all cambered surfaces that fit closely together. The nylon material can reduce the damage on the upper surface of the impeller (11). The upper cover of the impeller (8) is surrounded by a ring to cover the impeller (11) to protect specific features from damage. The pressure fits tightly with the clamp upper cover (4) and the impeller (11). 8.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的叶轮套筒（9）为尼龙制环状，将其套在叶轮上部，保护叶轮上部易损面避免与外侧夹具体直接接触。8. The special fixture for abrasive grain streamer finishing of complex inner flow passages of impellers according to claim 1, characterized in that the impeller sleeve (9) is a nylon ring, which is sleeved on the upper part of the impeller to protect the impeller The upper consumable surface avoids direct contact with the outer clamp body. 9.根据权利要求8所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的叶轮套筒（9）与叶轮接触面使用石蜡密封，避免小颗粒磨粒进入叶轮（11）与叶轮套筒（9）空隙中，破坏已加工的叶轮（11）表面。9. The special fixture for abrasive flow finishing of the impeller complex inner flow channel according to claim 8, characterized in that the contact surface of the impeller sleeve (9) and the impeller is sealed with paraffin to prevent small abrasive particles from entering the impeller (11) In the gap between the impeller sleeve (9), destroy the surface of the impeller (11) that has been processed. 10.根据权利要求1所述的叶轮复杂内流道磨粒流光整加工专用夹具，其特征在于，所述的螺纹杆（10）底端设有螺纹，用于和叶轮底座（6）中心螺纹孔配合，配合完全后螺纹杆上端和叶轮（11）中心螺纹孔压紧，可保护加工好的螺纹孔，避免其受到磨料的损伤。10. The special fixture for abrasive flow finishing of the impeller complex inner flow channel according to claim 1, wherein the bottom end of the threaded rod (10) is provided with a thread, which is used for the center thread of the impeller base (6). Hole matching, after the matching is complete, the upper end of the threaded rod and the central threaded hole of the impeller (11) are pressed tightly, which can protect the processed threaded hole and prevent it from being damaged by abrasives.
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