CN113977518A - Precise assembly fixture and assembly method for bearing bush of supporting casing - Google Patents

Precise assembly fixture and assembly method for bearing bush of supporting casing Download PDF

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Publication number
CN113977518A
CN113977518A CN202111339531.XA CN202111339531A CN113977518A CN 113977518 A CN113977518 A CN 113977518A CN 202111339531 A CN202111339531 A CN 202111339531A CN 113977518 A CN113977518 A CN 113977518A
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Prior art keywords
bearing bush
face
supporting
pressing plate
underframe
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CN113977518B (en
Inventor
李祖卫
李先号
李静
庞旭乐
王永利
何刚
陈川
李烨
左军
严勤斌
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AECC Guizhou Liyang Aviation Power Co Ltd
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AECC Guizhou Liyang Aviation Power Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
    • B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
    • B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
    • B25B11/02—Assembly jigs
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Automatic Assembly (AREA)

Abstract

The invention discloses a precise assembly fixture and an assembly method for a bearing bush of a supporting casing. The chassis is provided with a stud for connecting the pressing plate and a plurality of chassis bosses with positioning function, the surface of each chassis boss is provided with an arc-shaped positioning surface, and the pressing plate is provided with a plurality of arc-shaped pressing surfaces. When the supporting casing and the bearing bush are assembled, the pressing plate applies extrusion force to the end face of the bearing bush, so that the gap between the lower end face of the bearing bush and the upper end face of the annular protrusion on the first inner circular face of the first mounting edge meets the requirement. The invention has simple operation, high efficiency, uniform clearance and high assembly quality.

Description

Precise assembly fixture and assembly method for bearing bush of supporting casing
Technical Field
The invention belongs to the field of machining, and particularly relates to a precision assembly fixture and an assembly method for a supporting casing and a bearing bush.
Background
As shown in FIG. 1, during the processing of the supporting casing, a bearing bush needs to be assembled, and the radial fit between the bearing bush and the hole is an interference fit (the outer diameter of the bearing bush is 0.145-0.070 mm larger than the inner diameter of the first inner circular surface of the first mounting edge). The interference fit method generally comprises a static force press-in method, a dynamic force press-in method and a temperature difference fit method, at present, the bearing bush is mainly soaked in liquid nitrogen to be cooled so as to be cooled to reach an easy fit state, and when the bearing bush returns to normal temperature, the bearing bush expands to be in interference fit with a mounting edge. However, in the process of restoring the bearing bush to normal temperature, the bush is gradually popped out to the top end, and the gap between the bush and the bottom of the mounting edge is difficult to ensure.
Because the required clearance (such as the axial clearance and the non-radial clearance of the lower end face of the bearing bush in fig. 3 and 4) between the bearing bush and the mounting face of the supporting casing is not more than 0.02mm, in the process of mounting the bearing bush, in order to ensure the mounting clearance, the clearance is usually adjusted by repeatedly knocking the bearing bush, and due to improper operation, the surface of the supporting casing is frequently damaged and gouged, and is provided with scratches, so that the processing quality of parts is seriously influenced, the development process of an engine is delayed, and the delivery of products is influenced.
In order to improve the processing quality of the supporting casing and improve the processing efficiency of the supporting casing, it is urgently needed to design a special fixture and an assembly method for the supporting casing and the bearing bush, and the special fixture and the assembly method are used for assembling the supporting casing and the bearing bush, so that the processing quality of the supporting casing is ensured, and the operation of field workers is facilitated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a precision assembly fixture and an assembly method for a bearing bush of a supporting casing, which ensure that the gap between the lower end of the bearing bush and the end surface of the mounting edge of the supporting casing (the upper end surface of an annular bulge) is not more than 0.02mm, simultaneously save repeated knocking of workers, avoid the parts from being damaged, scratched and inclined repeatedly due to knocking of the parts, avoid the waste of a large amount of time and manpower and the increase of labor intensity caused by repeatedly correcting the parts to ensure the assembly gap, reduce the processing cost of the parts, accelerate the production progress of the parts, and effectively shorten the development process of an engine.
In order to realize the purpose, the invention adopts the following technical scheme:
a precise assembly fixture for a bearing bush of a supporting casing comprises a first mounting edge and a second mounting edge which are coaxial, wherein the inner side of the first mounting edge is a first inner circular surface, one end of the first inner circular surface is provided with an annular bulge, the inner side of the second mounting edge is a second inner circular surface, the outer circular surface of the bearing bush is in interference fit with the first inner circular surface, a gap is arranged between the lower end surface of the bearing bush and the upper end surface of the annular bulge, the precise assembly fixture comprises,
a stud;
the bottom frame is connected with one end of the stud, the upper end surface of the bottom frame is provided with a plurality of bottom frame bosses protruding upwards, the surface of each bottom frame boss is provided with an arc-shaped positioning surface, the arc-shaped positioning surfaces on the surfaces of the plurality of bottom frame bosses are all positioned on a first cylindrical surface taking the stud as an axis, and the outer diameter of the first cylindrical surface is equal to the inner diameter of a second inner cylindrical surface;
the pressing plate is provided with a through hole and connected with the stud through the through hole, a plurality of arc-shaped pressing surfaces are arranged on the outer circumferential surface of the pressing plate and are located on a second cylindrical surface with the stud as an axis, and the outer diameter of the second cylindrical surface is equal to the inner diameter of the first inner circular surface.
Further, the underframe comprises a plurality of linear support legs, and one ends of the support legs are intersected with the stud.
Furthermore, the number of the support legs is four, and an included angle between every two adjacent support legs is 90 degrees.
Furthermore, the pressing plate comprises a plurality of linear pressing rods, one ends of the pressing rods are intersected at the through hole, and the end face of the other end of each pressing rod is an arc-shaped pressing face.
Furthermore, the number of the pressure rods is three, and the included angle between every two adjacent pressure rods is 120 degrees.
Further, the precision assembly fixture further comprises a nut, and the nut is connected to the stud.
A precise assembly method for a bearing bush of a supporting casing comprises a first mounting edge, a first inner circular surface is arranged on the inner side of the first mounting edge, an annular bulge is arranged at one end of the first inner circular surface, the outer circular surface of the bearing bush is in interference fit with the first inner circular surface, a gap is arranged between the lower end surface of the bearing bush and the upper end surface of the annular bulge, the assembly method comprises the following steps,
after the bearing bush is installed on the first installation edge, a limiting piece is arranged on the axial end face, far away from the gap, of the bearing bush, the limiting piece can drive the bearing bush to move and reduce the size of the gap, and when the size of the gap meets the requirement, the distance between the limiting piece and the upper end face of the annular protrusion is kept unchanged.
The limiting piece simultaneously plays a role in driving the bearing bush to move and keeping the size of a gap between the lower end face of the bearing bush and the upper end face of the annular protrusion.
The assembling method of the precise assembling clamp for the bearing bush of the supporting casing with the nut comprises the following steps,
step one, a bearing bush is arranged in a first mounting edge of a supporting casing;
mounting the underframe at a second mounting edge, wherein an arc positioning surface on the surface of the boss of the underframe is matched and positioned with a second inner circular surface of the second mounting edge, and the upper end surface of the boss of the underframe is tightly attached to the lower end surface of the second mounting edge;
putting the pressing plate into the stud from one side of the first mounting edge of the supporting casing through the through hole, ensuring that an arc-shaped pressing surface on the outer circumferential surface of the pressing plate is contacted with a first inner circular surface, screwing a nut into the stud, and driving the pressing plate to move towards the bearing bush through rotating the nut, so that the bearing bush is extruded to enable the gap between the lower end surface of the bearing bush and the upper end surface of the annular bulge to be reduced;
step four, keeping the position of the pressing plate unchanged through the fixing nut for a period of time, and then checking whether the gap value between the lower end face and the upper end face of the annular bulge is qualified or not;
and fifthly, disassembling the nut, the pressing plate and the bottom frame if the value of the gap is qualified.
Further, in the first step, before the bearing bush is installed on the first installation edge of the supporting casing, the bearing bush is placed into liquid nitrogen to be cooled for a period of time.
Further, in the fourth step, a gap between the outer circular surface of the bearing bush and the upper end surface of the annular protrusion is detected through the feeler gauge.
Compared with the prior art, the assembling clamp and the assembling method have the following characteristics:
1) by adopting the assembly fixture, on the premise of ensuring that the gap meets the requirement, the bearing bush can be prevented from being repeatedly knocked, the labor intensity is reduced, the production process is accelerated, the arc-shaped pressing surface of the pressing plate is divided into a plurality of blocks, the friction resistance (the friction contact area is reduced) when the whole surface moves relative to the first inner circular surface is reduced, meanwhile, the lower end surface of the pressing plate is limited by the nut and is matched with the action of the arc-shaped positioning surface on the bottom plate, the gap of the axial end surface of the bearing bush is ensured to be qualified (the gap is not unqualified because the part of the bearing bush is separated from the first inner circular hole due to the deformation extrusion force generated by interference assembly of the bearing bush), and the bearing bush is coaxial with the first inner circular surface of the first mounting edge, and the radial gap is uniform;
2) by adopting the assembling method, the assembling clearance of the axial end face after the interference assembly of the bearing bush is controlled to be not more than 0.02mm, the processing quality of the supporting casing is ensured, and the nut and the pressure plate can uniformly extrude the bearing bush, so that the clearance between the lower end face of the whole bearing bush and the upper end face of the annular bulge on the first inner circular face is uniform and meets the requirement.
Drawings
FIG. 1 is a schematic view of a bearing cartridge assembly for a support case;
FIG. 2 is a schematic view of the construction of the assembly fixture;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
FIG. 4 is a schematic view of the support case bearing bushing assembly fixture in an assembled state;
in the figure, 1, an underframe, 2, a pressure plate, 3, a nut, 4, a first mounting edge, 5, a second mounting edge, 6, a stud, 7, an underframe boss, 8, a bearing bush and 9, a gap are arranged.
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.
As shown in fig. 1 and 3, the supporting casing includes a first mounting edge 4 and a second mounting edge 5 which are coaxial, the inner side of the first mounting edge 4 is a first inner circular surface, one end of the first inner circular surface has an annular protrusion, the inner side of the second mounting edge 5 is a second inner circular surface, the outer circular surface of the bearing bush 8 is in interference fit with the first inner circular surface (the outer diameter of the bearing bush 8 is 0.145-0.070 mm larger than the inner diameter of the first inner circular surface of the first mounting edge 4), and a gap 9 is formed between the lower end surface of the bearing bush 8 and the upper end surface of the annular protrusion of the first inner circular surface.
As shown in figure 2, the invention designs a precision assembly fixture for a supporting casing and a bearing bush, which mainly comprises a chassis 1, a pressure plate 2, a nut 3, a stud 6 and a chassis boss 7. The underframe 1 is provided with a stud 6 for connecting the pressing plate 2 and 4 underframe bosses 7 for positioning, and the diameter of a first cylindrical surface where the end surface (arc positioning surface) of the outermost arc section of the 4 underframe bosses 7 is
Figure BDA0003351950120000041
The first cylindrical surface axis is coaxial with the stud 6. The chassis boss 7 has a height of bmm. The precision assembly jig utilizes the chassis boss 7 to limit the chassis 1 so as to be fixed on the supporting caseThe second mounting edge 5 has a circular hole (matching with the second inner circular surface) with an inner diameter of
Figure BDA0003351950120000042
The depth (b +0.5) mm is used for positioning the stud 6 to be coaxial with the first mounting edge 4 and the second mounting edge 5 of the supporting casing, and four support legs (the support legs take the stud 6 as the circle center and are positioned on a radial line, and the included angle of two adjacent support legs is 90 degrees) on the underframe 1 are fixedly clung to the end surface of the second mounting edge 5; the pressing plate 2 is in sleeve joint fit with the stud 6 through a through hole at the center of the pressing plate, and the diameter of the through hole at the center of the pressing plate 2 is
Figure BDA0003351950120000043
The diameter of the stud 6 is
Figure BDA0003351950120000044
The pressing plate 2 comprises three pressing rods (the included angle between two adjacent pressing rods is 120 degrees, one ends of the three pressing rods are connected together), and the diameter of a second cylindrical surface where an arc section (an arc pressing surface) at the tail end of each pressing rod is
Figure BDA0003351950120000046
The inner diameter of the first inner circular surface corresponding to the first mounting edge 4 of the supporting casing is
Figure BDA0003351950120000045
(ii) a The upper thread of the stud 6 is MC (C corresponds to the same hole aperture value), and the inner hole aperture of the nut 3 is MC (C corresponds to the hole aperture value of the screw hole); the pressing plate 2 is assembled on the stud 6, and the nut 3 is in threaded fit with the stud 6 and is used for pressing and driving the pressing plate 2 to move on the stud 6, wherein in the dimensions, A is more than E and more than C is more than b.
The pressing plate 2 plays roles of axial limiting, axial pressing and radial positioning, and the outer circumferential end face of the pressing plate is an arc-shaped pressing face which is matched with the inner diameter of the first inner circular face of the first mounting edge 4 and is larger than the outer diameter of the bearing bush 8. And because the height of the bearing bush 8 is less than the inner height of the first inner circle surface of the first mounting edge 4, the pressing plate 2 can be clamped in the first inner circle surface and is continuously screwed by the nut 3 to compress the bearing bush 8 and the first mounting edge 4 in the axial direction, and the value of the gap 9 is ensured to be less than or equal to 0.02mm
Taking the supporting casing and bearing cartridge 8 of fig. 1 as an example, as shown in fig. 4, a specific embodiment of the assembly process is as follows:
1. placing the bearing bush 8 in a porcelain basin filled with liquid nitrogen, ensuring that the liquid nitrogen submerges the bearing bush 8, waiting for 10-15 min, after the bearing bush 8 is cooled, assembling the bearing bush 8 into a circular hole of the first mounting edge 4 to be in interference fit with the first inner circular surface, and tightly attaching the lower end face of the bearing bush 8 to the upper face of the annular bulge on the first inner circular surface;
2. the underframe 1 is assembled on the second mounting edge 5, the arc positioning surface at the outer circumference of the underframe boss 7 is fixed in the circular hole of the second mounting edge 5 (matched with the second inner circular surface), and the upper surface of the underframe boss 7 is tightly attached to the lower end surface of the second mounting edge 5;
3. assembling the pressing plate 2 on a stud 6 connected with the underframe 1 through a through hole;
4. assembling a nut 3 on a stud 6 of an underframe 1, screwing the nut with a torque wrench to enable a pressure plate 2 to move, pressing an arc-shaped pressing surface of the pressure plate 2 into a first inner circular surface and attaching the first inner circular surface, completely propping against the upper end surface of a bearing bush 8 by the lower end surface of the pressure plate 2, keeping the position for waiting for 5 minutes (namely the nut 3 and the pressure plate 2 are not moved), checking that a gap 9 between the bearing bush 8 and the first inner circular surface of a first mounting edge 4 is not more than 0.02mm by using a feeler gauge, and in the process, fixing the whole fixture, and recovering the bearing bush 8 to normal temperature on the premise of ensuring that the gap 9 is not more than 0.02 mm;
5. and (3) disassembling the nut 3 on the precision assembling clamp, disassembling the pressing plate 2 on the precision assembling clamp, and taking down the underframe 1 of the precision assembling clamp.
The method can be applied to the assembly process of similar parts such as the supporting casing and the rectifying supporting casing, and the one-time assembly qualification rate of the parts is improved to 100 percent by applying the method; the use of the invention ensures that the assembly clearance of the bearing bush 8 meets the requirement of 0.02 mm.

Claims (10)

1. The utility model provides a support quick-witted casket bearing bush precision assembly anchor clamps, including coaxial first installation limit (4) and second installation limit (5) on the supporting machine casket, first installation limit (4) inboard is first interior disc, and the one end of first interior disc has an annular arch, and second installation limit (5) inboard is interior disc of second, the outer disc and the interior disc interference fit of first interior disc of bearing bush (8), has a clearance (9) between the lower terminal surface of bearing bush (8) and the bellied up end of annular, its characterized in that: the precision assembling jig comprises a jig body and a jig body,
a stud (6);
the device comprises an underframe (1), wherein the underframe (1) is connected with one end of a stud (6), the upper end surface of the underframe (1) is provided with a plurality of underframe bosses (7) which protrude upwards, the surface of each underframe boss (7) is provided with an arc positioning surface, the arc positioning surfaces on the surfaces of the underframe bosses (7) are all positioned on a first cylindrical surface which takes the stud (6) as an axis, and the outer diameter of the first cylindrical surface is equal to the inner diameter of a second inner circular surface;
the pressing plate (2), it has the through-hole to open on the pressing plate (2), and pressing plate (2) are connected with double-screw bolt (6) through the through-hole, and the outer peripheral surface of pressing plate (2) has many arcs to compress tightly the face, and many arcs compress tightly the face and all be located the second face of cylinder that uses double-screw bolt (6) as the axis, and the external diameter on the second face of cylinder equals the internal diameter of first interior face.
2. The precision assembly fixture for supporting the bearing bush of the casing as claimed in claim 1, wherein: the underframe (1) comprises a plurality of linear support legs, and one ends of the support legs are intersected with the stud (6).
3. The precision assembly fixture for supporting the bearing bush of the casing as claimed in claim 2, wherein: the supporting legs are four in number, and an included angle between every two adjacent supporting legs is 90 degrees.
4. The precision assembly fixture for supporting the bearing bush of the casing as claimed in claim 1, wherein: the pressing plate (2) comprises a plurality of linear pressing rods, one ends of the pressing rods are intersected at the through hole, and the end face of the other end of each pressing rod is an arc-shaped pressing face.
5. The precision assembly fixture for supporting the bearing bush of the casing as set forth in claim 4, wherein: the number of the pressure rods is three, and the included angle between every two adjacent pressure rods is 120 degrees.
6. The precision assembly fixture for supporting the bearing bush of the casing as claimed in claim 1, wherein: the screw rod further comprises a nut (3), and the nut (3) is connected to the stud (6).
7. A precise assembly method for a bearing bush of a supporting casing comprises a first mounting edge (4), a first inner circular surface is arranged on the inner side of the first mounting edge (4), an annular bulge is arranged at one end of the first inner circular surface, an outer circular surface of a bearing bush (8) is in interference fit with the first inner circular surface, and a gap (9) is arranged between a lower end surface of the bearing bush (8) and an upper end surface of the annular bulge, and is characterized in that: the assembling method comprises the following steps of,
after the bearing bush (8) is installed on the first installation edge (4), a limiting piece is arranged at the axial end face, far away from the gap (9), of the bearing bush (8), the limiting piece can drive the bearing bush (8) to move and reduce the size of the gap (9), and when the size of the gap (9) meets the requirement, the distance between the limiting piece and the upper end face of the annular protrusion is kept unchanged.
8. An assembling method using the precision assembling jig for supporting the bearing bush of the casing according to claim 6, characterized in that: comprises the following steps of (a) carrying out,
step one, a bearing bush (8) is arranged in a first mounting edge (4) of a supporting casing;
secondly, the underframe (1) is installed at the second installation edge (5), wherein an arc-shaped positioning surface on the surface of the underframe boss (7) is matched and positioned with a second inner circular surface of the second installation edge (5), and the upper end surface of the underframe boss (7) is tightly attached to the lower end surface of the second installation edge (5);
putting the pressing plate (2) into the stud (6) from one side of the first mounting edge (4) of the supporting casing through the through hole to ensure that an arc-shaped pressing surface on the outer circumferential surface of the pressing plate (2) is contacted with a first inner circular surface, screwing the nut (3) into the stud (6), and driving the pressing plate (2) to move towards the bearing bush (8) by rotating the nut (3), so that the bearing bush (8) is extruded to ensure that a gap (9) between the lower end surface of the bearing bush (8) and the upper end surface of the annular bulge is reduced;
keeping the position of the pressure plate (2) unchanged through the fixing nut (3) for a period of time, and then checking whether the value of a gap (9) between the lower end face and the upper end face of the annular bulge is qualified or not;
and fifthly, if the value of the gap (9) is qualified, disassembling the nut (3), the pressing plate (2) and the bottom frame (1).
9. The assembly method of claim 8, wherein: in the first step, before the bearing bush (8) is arranged on the first mounting edge (4) of the supporting casing, the bearing bush (8) is placed in liquid nitrogen for cooling for a period of time.
10. The assembly method of claim 8, wherein: and in the fourth step, detecting a gap (9) between the lower end surface of the bearing bush (8) and the upper end surface of the annular bulge through the feeler gauge.
CN202111339531.XA 2021-11-12 2021-11-12 Precise assembly fixture and assembly method for bearing sleeve of supporting casing Active CN113977518B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU774895A2 (en) * 1978-12-04 1980-10-30 Украинский Заочный Политехнический Институт Machine for heated assembling and dismantling of parts
CN202964557U (en) * 2012-11-05 2013-06-05 中国航空工业集团公司沈阳发动机设计研究所 Aircraft bearing installation compression device
CN103252619A (en) * 2013-05-02 2013-08-21 湖北三江航天江北机械工程有限公司 Combined milling method of shell body of bearing ball socket swing nozzle and fixture thereof
CN105234627A (en) * 2015-10-28 2016-01-13 重庆隆兆机械有限公司 Assembly tool for shaft and sleeve type assembly
CN112276475A (en) * 2020-10-29 2021-01-29 鹰普航空科技有限公司 Magnet assembling tool and assembling process matched with liquid nitrogen cold-charging technology for application

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU774895A2 (en) * 1978-12-04 1980-10-30 Украинский Заочный Политехнический Институт Machine for heated assembling and dismantling of parts
CN202964557U (en) * 2012-11-05 2013-06-05 中国航空工业集团公司沈阳发动机设计研究所 Aircraft bearing installation compression device
CN103252619A (en) * 2013-05-02 2013-08-21 湖北三江航天江北机械工程有限公司 Combined milling method of shell body of bearing ball socket swing nozzle and fixture thereof
CN105234627A (en) * 2015-10-28 2016-01-13 重庆隆兆机械有限公司 Assembly tool for shaft and sleeve type assembly
CN112276475A (en) * 2020-10-29 2021-01-29 鹰普航空科技有限公司 Magnet assembling tool and assembling process matched with liquid nitrogen cold-charging technology for application

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