CN114654188B - Method for replacing journal main body sleeve - Google Patents
Method for replacing journal main body sleeve Download PDFInfo
- Publication number
- CN114654188B CN114654188B CN202210413782.6A CN202210413782A CN114654188B CN 114654188 B CN114654188 B CN 114654188B CN 202210413782 A CN202210413782 A CN 202210413782A CN 114654188 B CN114654188 B CN 114654188B
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- China
- Prior art keywords
- pin
- main body
- hole
- journal
- blind hole
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- 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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
-
- 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
- B23P21/00—Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention provides a method for replacing a journal main body sleeve, which comprises the following steps: step 1, removing the stop pin and the sleeve on the journal main body; step 2, confirming the position of a pin connection blind hole on the journal main body, and processing a positioning hole on a new sleeve to be replaced according to the position, wherein the aperture of the positioning hole is smaller than that of the pin connection blind hole on the journal main body; step 3, installing a new sleeve to be replaced on the journal main body, and aligning the position of the pin connecting blind hole on the journal main body; step 4, continuously processing a stop pin hole on a new sleeve to be replaced on the basis of the positioning hole, wherein the aperture of the processed stop pin hole is equal to the aperture of the existing pin connecting blind hole on the journal main body; step 5, installing a stop pin; the invention not only improves the replacement work efficiency, but also prolongs the service life of the journal main body.
Description
Technical Field
The invention belongs to the field of machining, and particularly relates to a method for replacing a journal main body sleeve.
Background
For the journal structure of a certain fulcrum bearing installation part, 2 parts journal main bodies and sleeves are required to be processed respectively due to process limitation, concentric assembly is carried out after the processing is completed, stop pins are adopted for interference connection, the sleeve is replaced after the service life of the sleeve reaches the limit, the replacement method is to use a drill bit to drill the stop pins out, then pull out the sleeve, reinstall a new sleeve and process a pin hole to be concentric with holes on the journal main bodies and the sleeve, and the diameter of the hole is matched with the stop pins for interference connection.
Disclosure of Invention
The invention aims to provide a method for replacing a journal main body sleeve, which solves the defects of low efficiency and high material waste rate in the sleeve replacement method in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a method for replacing a journal main body sleeve, which comprises the following steps:
step 1, removing the stop pin and the sleeve on the journal main body;
step 2, confirming the position of a pin connection blind hole on the journal main body, and processing a positioning hole on a new sleeve to be replaced according to the position, wherein the aperture of the positioning hole is smaller than that of the pin connection blind hole on the journal main body;
step 3, installing a new sleeve to be replaced on the journal main body, and aligning the position of the pin connecting blind hole on the journal main body;
step 4, continuously processing a stop pin hole on a new sleeve to be replaced on the basis of the positioning hole, wherein the aperture of the processed stop pin hole is equal to the aperture of the existing pin connecting blind hole on the journal main body;
and 5, installing a stop pin.
Preferably, in step 1, the stop pin is removed using a pin remover.
Preferably, the specific method for removing the stop pin by using the pin remover is as follows:
firstly, machining an internal thread bottom hole at the central position of a stop pin;
secondly, processing internal threads on the basis of the internal thread bottom hole;
finally, the stop pin is removed using a threaded coupling using a pin puller.
Preferably, the difference between the outer diameter of the internal thread and the outer diameter of the stop pin is less than 0.5-1 mm.
Preferably, in the step 2, the difference between the aperture of the positioning hole and the aperture of the existing pin connecting blind hole on the journal main body is smaller than 0.8-1 mm.
Preferably, in step 3, the positioning hole is positioned within the diameter range of the pin coupling blind hole of the journal main body when the new sleeve to be replaced is mounted on the journal main body.
Preferably, the process locating pin is utilized such that the location of the locating hole is within the diameter of the journal body pin coupling blind hole.
Preferably, the difference between the outer diameter of the process positioning pin and the aperture of the positioning hole is 0.04-0.1mm.
Preferably, in step 3, a lever dial gauge is used to align the pin coupling blind hole position of the journal body.
Preferably, the pin joint blind hole position on the journal main body is aligned by the following specific method:
fixing the journal assembly of the mounting sleeve on a machine tool workbench;
the lever dial indicator is arranged on a machine tool spindle, the machine tool spindle is moved to extend the gauge head of the lever dial indicator to the position of the pin connecting blind hole on the journal main body through the locating hole on the sleeve, the lever dial indicator is rotated for one circle, and the machine tool spindle is combined until the change of the lever dial indicator meets the set threshold.
Compared with the prior art, the invention has the beneficial effects that:
the method for replacing the journal main body sleeve provided by the invention utilizes a direct measurement position method to determine the position of the pin connection blind hole on the journal main body, further processes a stop pin hole on a new sleeve according to the position, and when the stop pin hole is processed, the diameter of the pin connection blind hole on the journal main body is not increased, the existing stop pin is not required to be matched, the replacement period is shortened by 50% by directly using the existing stop pin, and the service life of the journal main body is prolonged to 10 times of the life design period of the journal main body only after the previous 3 times of sleeve replacement, thereby saving a great amount of cost.
In summary, the method ensures that the hole is machined along the original hole, and the purpose of not damaging the original hole is achieved; the invention not only improves the replacement work efficiency, but also prolongs the service life of the journal main body.
Drawings
FIG. 1 is a schematic illustration of a prior art journal body and sleeve coupling using a stop pin;
FIG. 2 is a schematic view of the thread specification in the center of the stop pin of the present invention;
FIG. 3 is a schematic illustration of the mounting sleeve, alignment and tooling of the present invention;
the novel pin comprises a shaft neck main body 2, a stop pin 3, a sleeve d, a pin connecting blind hole M on the shaft neck main body, a thread specification d1 processed on the stop pin, a thread minor diameter h of M, a thread minor diameter depth 4 of M, a novel sleeve 5, a stop pin d2, a stop pin hole bottom hole aperture d3 on the novel sleeve, a process positioning pin outer diameter d4 and a stop pin hole aperture on the novel sleeve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2 and 3, the method for replacing the journal main body sleeve provided by the invention comprises the following steps:
step 1, removing a stop pin through a pin puller;
step 2, removing the sleeve on the journal main body;
step 3, measuring the position of the pin connecting blind hole on the journal main body;
step 4, processing a positioning hole on the new sleeve to be replaced according to the measured position, wherein the aperture is d2; the purpose of processing this locating hole is to guarantee to adopt the lever amesdial to find time to do not interfere in the follow-up.
Step 5, installing a new sleeve to be replaced on the journal main body, wherein the position of the positioning hole is within the diameter range of the pin connection blind hole on the journal main body;
step 6, aligning the positions of the pin connecting blind holes on the journal main body, so that the original pin connecting blind holes on the journal are not damaged when pin connecting holes on the sleeve are processed; and continuously processing a stop pin hole on a new sleeve to be replaced on the basis of the positioning hole, wherein the aperture d4 of the processed stop pin hole is equal to the aperture of the existing pin connection blind hole on the journal main body.
And 7, installing a stop pin.
In the step 1, the stop pin is removed by a pin puller, and the specific method is as follows:
firstly, processing an internal thread bottom hole with a diameter d1 and a hole depth h at the central position of a stop pin; and processing an internal thread M on the basis of the internal thread bottom hole, wherein the difference between the external diameter of the internal thread and the external diameter of the stop pin is less than 0.5-1 mm.
And secondly, the stop pin is removed by using a pin puller through threaded connection, so that the damage to the existing pin connection blind hole on the journal main body is avoided.
In step 4, the aperture of the positioning holeWhere d is the diameter of the existing pin-coupled blind bore in the journal body.
In step 4, the positioning hole is formed within the diameter range of the pin joint blind hole of the journal main body by utilizing the process positioning pin, wherein the outer diameter of the process positioning pin
In step 6, the position of the pin joint blind hole of the main shaft neck is aligned by using a lever dial indicator.
In step 6, the specific method for aligning the pin joint blind hole position on the journal main body is as follows:
s1, fixing a journal assembly of a mounting sleeve on a machine tool workbench;
s2, mounting the lever dial indicator on a machine tool spindle, moving the machine tool spindle to extend the gauge head of the lever dial indicator to the position of the pin connecting blind hole on the journal main body through the locating hole on the sleeve, rotating the lever dial indicator for one circle, and combining with the moving machine tool spindle to ensure that the change of the lever dial indicator is within 0.002 mm.
In step 6, the aperture d4=d of the stopper pin hole after the processing is completed.
The invention adopts a method of directly measuring the position through the process design to ensure that the hole is machined along the original hole position, thereby achieving the purpose of not damaging the original hole.
The traditional method is to directly process the locating hole on the sleeve until the diameter of the locating hole is the same as the diameter of the pin connecting blind hole on the journal main body, and then press-fit the locating hole to ensure concentricity.
Claims (1)
1. A method of replacing a journal body shell, comprising the steps of:
step 1, removing the stop pin and the sleeve on the journal main body;
step 2, confirming the position of a pin connection blind hole on the journal main body, and processing a positioning hole on a new sleeve to be replaced according to the position, wherein the aperture of the positioning hole is smaller than that of the pin connection blind hole on the journal main body;
step 3, installing a new sleeve to be replaced on the journal main body, and aligning the position of the pin connecting blind hole on the journal main body;
step 4, continuously processing a stop pin hole on a new sleeve to be replaced on the basis of the positioning hole, wherein the aperture of the processed stop pin hole is equal to the aperture of the existing pin connecting blind hole on the journal main body;
step 5, using the existing stop pin for installation without the need for reformulating a new stop pin;
in the step 1, removing a stop pin by using a pin remover;
the concrete method for removing the stop pin by using the pin puller is as follows:
firstly, machining an internal thread bottom hole at the central position of a stop pin;
secondly, processing internal threads on the basis of the internal thread bottom hole;
finally, removing the stop pin by using a pin puller through threaded connection;
the difference between the outer diameter of the internal thread and the outer diameter of the stop pin is less than 0.5-1 mm;
in the step 2, the difference between the aperture of the positioning hole and the aperture of the existing pin connecting blind hole on the journal main body is smaller than 0.8-1 mm;
in the step 3, when a new sleeve to be replaced is installed on the journal main body, the position of the positioning hole is within the diameter range of the pin connection blind hole of the journal main body;
the positioning hole is positioned within the diameter range of the pin connecting blind hole of the journal main body by utilizing the process positioning pin;
the difference between the outer diameter of the process locating pin and the aperture of the locating hole is 0.04-0.1mm;
in the step 3, a lever dial indicator is used for aligning the pin joint blind hole position of the main shaft neck;
the pin joint blind hole position on the alignment journal main body is specifically as follows:
fixing the journal assembly of the mounting sleeve on a machine tool workbench;
the lever dial indicator is arranged on a machine tool spindle, the machine tool spindle is moved to extend the gauge head of the lever dial indicator to the position of the pin connecting blind hole on the journal main body through the locating hole on the sleeve, the lever dial indicator is rotated for one circle, and the machine tool spindle is combined until the change of the lever dial indicator meets the set threshold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413782.6A CN114654188B (en) | 2022-04-19 | 2022-04-19 | Method for replacing journal main body sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210413782.6A CN114654188B (en) | 2022-04-19 | 2022-04-19 | Method for replacing journal main body sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114654188A CN114654188A (en) | 2022-06-24 |
| CN114654188B true CN114654188B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210413782.6A Active CN114654188B (en) | 2022-04-19 | 2022-04-19 | Method for replacing journal main body sleeve |
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| CN (1) | CN114654188B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769287A (en) * | 2008-12-27 | 2010-07-07 | 鸿富锦精密工业（深圳）有限公司 | Safety pin and manufacturing method thereof |
| CN103753100A (en) * | 2014-01-16 | 2014-04-30 | 瓮福（集团）有限责任公司 | Water pump bearing box bearing hole wear repair method |
| CN104625718A (en) * | 2014-12-24 | 2015-05-20 | 南车成都机车车辆有限公司 | Centring and aligning mounting device for idle gear shaft sleeve of locomotive diesel engine |
| CN204545860U (en) * | 2015-04-20 | 2015-08-12 | 山东太古飞机工程有限公司 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture |
| CN206702931U (en) * | 2017-04-25 | 2017-12-05 | 深圳怡化电脑股份有限公司 | Pressure pin device |
| CN112959029A (en) * | 2021-04-03 | 2021-06-15 | 祁永幸 | Automatic assembly equipment of dysmorphism axle sleeve |
-
2022
- 2022-04-19 CN CN202210413782.6A patent/CN114654188B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769287A (en) * | 2008-12-27 | 2010-07-07 | 鸿富锦精密工业（深圳）有限公司 | Safety pin and manufacturing method thereof |
| CN103753100A (en) * | 2014-01-16 | 2014-04-30 | 瓮福（集团）有限责任公司 | Water pump bearing box bearing hole wear repair method |
| CN104625718A (en) * | 2014-12-24 | 2015-05-20 | 南车成都机车车辆有限公司 | Centring and aligning mounting device for idle gear shaft sleeve of locomotive diesel engine |
| CN204545860U (en) * | 2015-04-20 | 2015-08-12 | 山东太古飞机工程有限公司 | 737NG series aircraft main landing gear wheel shaft axle sleeve and brake cover disassembling fixture |
| CN206702931U (en) * | 2017-04-25 | 2017-12-05 | 深圳怡化电脑股份有限公司 | Pressure pin device |
| CN112959029A (en) * | 2021-04-03 | 2021-06-15 | 祁永幸 | Automatic assembly equipment of dysmorphism axle sleeve |
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| Publication number | Publication date |
|---|---|
| CN114654188A (en) | 2022-06-24 |
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