CN118046209A - Anti-interference precise positioning reciprocating type assembly tool and assembly method - Google Patents
Anti-interference precise positioning reciprocating type assembly tool and assembly method Download PDFInfo
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- CN118046209A CN118046209A CN202410451329.3A CN202410451329A CN118046209A CN 118046209 A CN118046209 A CN 118046209A CN 202410451329 A CN202410451329 A CN 202410451329A CN 118046209 A CN118046209 A CN 118046209A
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- core rod
- guide
- assembly
- interference
- positioning
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- 238000000034 method Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000012797 qualification Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The invention discloses an anti-interference precise positioning reciprocating assembly tool and an assembly method, which are used for assembling an aeroengine blanking cover assembly, and comprise a base (8), a workbench (5) and a guide core rod (1), wherein the workbench (5) is connected with the base (8) through a connecting bolt (9), a guide hole is formed in the workbench (5), a positioning core rod (4) is arranged in the guide hole, a cavity is formed in the lower part of the workbench (5), the cavity is communicated with the guide hole, a spring (7) is arranged in the cavity, one end of the spring (7) is positioned in a counter bore on the base (8), and the other end of the spring is in contact with the positioning core rod (4). The invention eliminates potential safety risk in the assembly process, increases the function of correcting and guiding, avoids damage to the main body caused by deviation generated by inclination of the guide pipe in the assembly process, realizes quick alignment and positioning, presses the guide pipe in a one-time qualified manner, and improves the assembly efficiency and qualification rate.
Description
Technical Field
The invention relates to the technical field of part assembly, in particular to an interference-preventing precise positioning reciprocating assembly tool and an assembly method.
Background
The plugging cover assembly is widely applied to an aeroengine and is mainly used for fixing and connecting engine accessory cases. In order to realize hole-to-hole connection, a conduit is generally required to be assembled in one of the inner holes, the other inner hole is connected through the conduit, and the free flow passing between the two inner holes is ensured. At present, no shaped tooling is available for assembling the type of combined blanking cover, and an assembling fitter basically assembles the combined blanking cover by self experience, so that the once-through assembly qualification rate is low, the assembly efficiency is low, and the potential safety risk is caused by manual assembly. Current assembly situation and difficulty of combined blanking cover:
1. the combined blanking cover can not be positioned when being assembled with the catheter, a hand of a hand part is operated by a bench worker through experience to assemble the pressure rod, and an operator is placed under the pressure rod by hand, so that potential safety risks are hidden.
2. The main body of the combined blanking cover is made of an aluminum piece AMS4027, the catheter of the sub-piece is made of stainless steel AMS5566, the catheter is required to be assembled into the main body in an interference mode in the assembling process, and parts can be scratched due to the fact that materials are different and the assembling process is slightly deviated.
3. The manual assembly alignment time is long, the guide pipe assembly is unguided, the rework rate is high, and the assembly efficiency is low.
Disclosure of Invention
The invention provides an anti-interference precise positioning reciprocating assembly tool and an assembly method, and aims to solve the technical problems of low assembly efficiency and low qualification rate of the existing blanking cover type assembly.
In order to solve the problems, the invention adopts the following technical scheme:
The utility model provides an anti-interference accurate positioning reciprocating type assembly fixture for the assembly of aeroengine blanking cover class sub-assembly, includes base, workstation, direction plug, the workstation passes through connecting bolt and is connected with the base, the guiding hole has been seted up on the workstation, installs the location plug in the guiding hole, and the cavity has been seted up to the lower part of workstation, and this cavity and guiding hole intercommunication set up the spring in the cavity, and spring one end is located the counter bore on the base, and the other end contacts with the location plug.
Further, the guide hole on the workbench is eccentrically arranged on one side of the workbench.
Furthermore, the guide core rod is cylindrical, a step is arranged on the guide core rod, the upper part of the guide core rod is arranged on the press, and a guide pipe is arranged at the lower part of the guide core rod.
Furthermore, the lower end of the guide core rod is a conical head.
Furthermore, a part of the positioning core rod is higher than the workbench, the upper part of the positioning core rod is provided with the combined blanking cover, and the positioning core rod can move up and down in the guide hole.
Further, the diameter of the cavity at the lower part of the workbench is larger than that of the guide hole at the upper part, and the cavity is not coaxial with the guide hole.
Furthermore, a stop block is arranged at the top of the spring and is positioned at the top of the cavity, and the bottom of the positioning core rod is in contact with the stop block.
An anti-interference precise positioning reciprocating assembly method comprises the following steps:
s1, mounting a guide core rod to a press machine before assembly, and adjusting the position of a base to enable a positioning core rod and the guide core rod to be positioned on the same central line;
S2, placing the guide pipe into liquid nitrogen for cooling for 3-5min, mounting the combined blanking cover on a positioning core rod in the guide pipe cooling process, taking out the cooled guide pipe by using forceps, and placing the guide pipe on a guide core rod mounted on a press machine;
S3, using a press to drive the guide core rod and the guide pipe to press down, guiding the guide core rod into the combined blanking cover, pressing the guide pipe into the combined blanking cover until the step surface of the guide pipe is attached to the upper surface of the combined blanking cover, ensuring that the radial clearance between the step surface of the guide pipe and the upper surface of the combined blanking cover is not more than 0.025mm in a 120-degree arc, and the radial clearance between the rest positions is not more than 0.1mm, thereby completing assembly.
Based on the technical scheme, the following technical effects can be produced:
The tool provided by the invention can form quick alignment and positioning through the guide core rod and the positioning core rod; the eccentric structure design ensures that the assembly of parts does not interfere, ensures that the step surface of the guide pipe is attached to the upper end surface of the combined blanking cover, the radial clearance between the step surface and the upper end surface is not more than 0.025mm in a 120-degree arc, and the radial clearance between the rest positions is not more than 0.1mm; meanwhile, due to the design of the spring, the tool can automatically recover to an initial position after the assembly is completed, and the assembly continuity is ensured; the upper structure and the lower structure of the tool design are connected through bolts, so that the processing difficulty is reduced, meanwhile, the detachable structure can be detached, the replacement of wearing parts such as an internal spring and the like can be met, and the cost is saved. After the assembly fixture is used, the problems of difficult assembly and positioning, part interference, catheter inclination and the like in the assembly process are effectively solved, and meanwhile, the characteristics of assembly consistency, repeatability, continuity, economy and the like are optimized and improved, so that the assembly qualification rate is improved obviously.
Drawings
FIG. 1 is a schematic diagram of an interference-preventing precise positioning reciprocating assembly tool;
FIG. 2 is a schematic diagram of the installation of the tool and the combined blanking cover of the present invention.
In the figure: the device comprises a 1-guiding core rod, a 2-guide pipe, a 3-combined blanking cover, a 4-positioning core rod, a 5-workbench, a 6-stop block, a 7-spring, an 8-base and a 9-connecting bolt.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
1-2, An anti-interference precise positioning reciprocating assembly fixture is used for assembling an aeroengine blanking cover assembly and comprises a base 8, a workbench 5 and a guide core rod 1, and is characterized in that the workbench 5 is connected with the base 8 through a connecting bolt 9, a guide hole is formed in the workbench 5, a positioning core rod 4 is installed in the guide hole, a cavity is formed in the lower portion of the workbench 5 and communicated with the guide hole, a spring 7 is arranged in the cavity, one end of the spring 7 is located in a counter bore on the base 8, and the other end of the spring 7 is in contact with the positioning core rod 4.
Alternatively or preferably, the guide hole on the workbench 5 is eccentrically arranged on one side of the workbench 5, the eccentric design of the guide hole ensures that the assembly of the parts does not interfere, the parts are positioned at the outer edge of the tool, and the parts have the largest movable space outside.
Alternatively or preferably, the guide core rod 1 is cylindrical, a step is arranged on the guide core rod 1, the upper part of the guide core rod 1 is installed on the press, the lower part of the guide core rod 1 is provided with the guide pipe 2, and the guide core rod 1 and the positioning core rod 4 respectively correspond to the guide pipe 2 and the combined blanking cover 3 to form quick alignment positioning of part assembly.
Alternatively or preferably, the lower end of the guide mandrel 1 is a conical head.
Alternatively or preferably, a part of the positioning core rod 4 is higher than the workbench 5, the combined blanking cover 3 is arranged on the upper part of the positioning core rod 4, and the positioning core rod 4 can move up and down in the guide hole.
Alternatively or preferably, the diameter of the cavity at the lower part of the workbench 5 is larger than that of the guide hole at the upper part, and the cavity is not coaxial with the guide hole.
Alternatively or preferably, a stop 6 is arranged at the top of the spring 7, the stop is positioned at the top of the cavity, and the bottom of the positioning mandrel 4 is contacted with the stop 6. The assembly fixture can automatically recover to the initial position, the design of the spring 7 can meet the requirement that the positioning core rod 4 can automatically return to the original point after each assembly is completed, and the assembly repeatability and continuity are formed.
An anti-interference precise positioning reciprocating assembly method comprises the following steps:
S1, before assembly, the guide core rod 1 is firstly installed to a press, and the position of a base 8 is adjusted to enable a positioning core rod 4 and the guide core rod 1 to be positioned on the same central line;
S2, putting the guide pipe 2 into liquid nitrogen for cooling for 3-5min, mounting the combined blanking cover 3 on the positioning core rod 4 during the cooling process of the guide pipe 2, taking out the cooled guide pipe 2 by using tweezers, and putting the guide pipe 2 on the guide core rod 1 mounted in the press;
s3, using a press to drive the guide core rod 1 and the guide pipe 2 to press down, guiding the guide core rod 1 into the combined blanking cover, pressing the guide pipe 2 into the combined blanking cover 3 until the step surface of the guide pipe 2 is attached to the upper surface of the combined blanking cover 3, ensuring that the radial clearance between the step surface of the guide pipe 2 and the upper surface of the combined blanking cover 3 is not more than 0.025mm in a 120-degree arc, and the radial clearance between the rest positions is not more than 0.1mm, thereby completing assembly.
The design thought of the assembly tool can be applied to similar or other products, and the tool can be applied to any part with a shaft assembled with a hole vertically, for example, the bearing is required to be prevented from inclining relative to the rocker hole in the assembly process of the titanium alloy rocker, and the distance relation of the bearing to the end face of the rocker hole is met by 0.25 mm. By using the assembly fixture, the coaxiality of the assembly of the bearing and the rocker arm hole is ensured by using the guiding relation of the guiding core rod and the positioning core rod; the distance between the positioning core rod 4 and the base 8 is controlled, so that the distance relation of the bearing to the end face of the rocker arm hole by 0.25mm is ensured. The invention can be effectively applied to all parts which are vertically assembled, and can solve the problems of qualification rate, positioning, interference, efficiency, cost, difficult manufacture and the like in the assembly process.
The present application has been described in detail with reference to the drawings and the embodiments, but the present application is not limited to the embodiments described above, and various changes can be made within the scope of those skilled in the art without departing from the spirit of the present application. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. The utility model provides an anti-interference accurate positioning reciprocating type assembly fixture for the assembly of aeroengine blanking cover class sub-assembly, includes base (8), workstation (5), direction plug (1), its characterized in that, workstation (5) are connected with base (8) through connecting bolt (9), the guiding hole has been seted up on workstation (5), installs location plug (4) in the guiding hole, and the cavity has been seted up in the lower part of workstation (5), and this cavity and guiding hole intercommunication set up spring (7) in the cavity, and spring (7) one end is located the counter bore on base (8), and the other end contacts with location plug (4).
2. The interference-preventing precise positioning reciprocating assembly fixture according to claim 1, wherein the guide hole on the workbench (5) is eccentrically arranged on one side of the workbench (5).
3. The anti-interference precise positioning reciprocating assembly fixture is characterized in that the guide core rod (1) is cylindrical, a step is arranged on the guide core rod (1), the upper portion of the guide core rod (1) is arranged on a press, and a guide pipe (2) is arranged at the lower portion of the guide core rod.
4. The anti-interference precise positioning reciprocating assembly fixture according to claim 3, wherein the lower end of the guide core rod (1) is a conical head.
5. The interference-preventing precise positioning reciprocating assembly tool according to claim 1, wherein a part of the positioning core rod (4) is higher than the workbench (5), the upper part of the positioning core rod (4) is provided with the combined blanking cover (3), and the positioning core rod (4) can move up and down in the guide hole.
6. The interference-preventing precise positioning reciprocating assembly fixture according to claim 1, wherein the cavity diameter of the lower part of the workbench (5) is larger than that of the guide hole of the upper part, and the cavity is not coaxial with the guide hole.
7. The anti-interference precise positioning reciprocating assembly fixture according to claim 1, wherein a stop block (6) is arranged at the top of the spring (7), the stop block is positioned at the top of the cavity, and the bottom of the positioning core rod (4) is in contact with the stop block (6).
8. An anti-interference accurate positioning reciprocating assembly method based on the anti-interference accurate positioning reciprocating assembly tool of any one of claims 1-7, which is characterized by comprising the following steps:
s1, before assembly, the guide core rod (1) is mounted to a press, and the position of a base (8) is adjusted to enable a positioning core rod (4) and the guide core rod (1) to be positioned on the same central line;
s2, placing the guide pipe (2) into liquid nitrogen for cooling for 3-5min, mounting the combined blanking cover (3) on the positioning core rod (4) in the cooling process of the guide pipe (2), taking out the cooled guide pipe (2) by forceps, and placing the guide pipe (2) on the guide core rod (1) mounted in the press;
s3, using a press to drive the guide core rod (1) and the guide pipe (2) to press down, guiding the guide core rod (1) into the combined blanking cover, pressing the guide pipe (2) into the combined blanking cover (3) until the step surface of the guide pipe (2) is attached to the upper surface of the combined blanking cover (3), ensuring that the radial clearance between the step surface of the guide pipe (2) and the upper surface of the combined blanking cover (3) is not more than 0.025mm in a 120-degree arc, and the radial clearance between the rest positions is not more than 0.1mm, thereby completing assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410451329.3A CN118046209A (en) | 2024-04-16 | 2024-04-16 | Anti-interference precise positioning reciprocating type assembly tool and assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410451329.3A CN118046209A (en) | 2024-04-16 | 2024-04-16 | Anti-interference precise positioning reciprocating type assembly tool and assembly method |
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| Publication Number | Publication Date |
|---|---|
| CN118046209A true CN118046209A (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410451329.3A Pending CN118046209A (en) | 2024-04-16 | 2024-04-16 | Anti-interference precise positioning reciprocating type assembly tool and assembly method |
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| CN (1) | CN118046209A (en) |
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| CN111805479A (en) * | 2020-07-02 | 2020-10-23 | 河北华北柴油机有限责任公司 | Portable engine camshaft bush press-fitting mechanism |
| CN214292821U (en) * | 2020-12-18 | 2021-09-28 | 大连创新齿轮箱制造有限公司 | Press mounting fixture for ensuring alignment of bush oil hole and gear oil hole |
| CN217965710U (en) * | 2022-08-19 | 2022-12-06 | 思达耐精密机电（常熟）有限公司 | Bushing press-fitting device for positioning inner diameter of driving ring |
| CN116838925A (en) * | 2023-06-29 | 2023-10-03 | 张家港市金帆箱柜有限公司 | Bending piece and punching equipment and method thereof |
| CN219901928U (en) * | 2023-05-25 | 2023-10-27 | 万向钱潮股份公司 | Auxiliary tool for preventing bearing from being placed and inclined and being pressed to cause support outer diameter to be enlarged |
-
2024
- 2024-04-16 CN CN202410451329.3A patent/CN118046209A/en active Pending
Patent Citations (14)
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| JP2000263350A (en) * | 1999-03-11 | 2000-09-26 | Nissan Motor Co Ltd | Bush press fitting device |
| CN201329487Y (en) * | 2008-10-24 | 2009-10-21 | 比亚迪股份有限公司 | Sliding bearing press-mounting device for press-mounting guide sleeve |
| CN201295831Y (en) * | 2008-10-31 | 2009-08-26 | 江苏罡阳股份有限公司 | Press mounting protection and guide structure of connecting rod bearing bush |
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| CN217965710U (en) * | 2022-08-19 | 2022-12-06 | 思达耐精密机电（常熟）有限公司 | Bushing press-fitting device for positioning inner diameter of driving ring |
| CN219901928U (en) * | 2023-05-25 | 2023-10-27 | 万向钱潮股份公司 | Auxiliary tool for preventing bearing from being placed and inclined and being pressed to cause support outer diameter to be enlarged |
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