CN114654188A - Method for replacing main body sleeve of shaft neck - Google Patents
Method for replacing main body sleeve of shaft neck Download PDFInfo
- Publication number
- CN114654188A CN114654188A CN202210413782.6A CN202210413782A CN114654188A CN 114654188 A CN114654188 A CN 114654188A CN 202210413782 A CN202210413782 A CN 202210413782A CN 114654188 A CN114654188 A CN 114654188A
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- CN
- China
- Prior art keywords
- journal
- pin
- main body
- hole
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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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 main body sleeve of a journal, which comprises the following steps: step 1, removing sleeves on a stop pin and a journal main body; step 2, confirming the position of the 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 connection blind hole on the journal main body; step 4, continuously processing the stop pin hole on the new sleeve to be replaced on the basis of the positioning hole, wherein the aperture of the stop pin hole after the processing is finished is equal to that of the existing pin connection blind hole on the journal main body; step 5, mounting 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 main body sleeve of a shaft neck.
Background
For the journal structure of a bearing mounting part of a certain fulcrum, 2 parts of a journal main body and a journal sleeve are required to be respectively processed due to process limitation, after the processing is finished, concentric assembly is carried out, a stop pin is adopted for interference connection, the sleeve is replaced after the service life of the sleeve reaches the end limit, the replacement method comprises the steps of removing the stop pin by drilling through a drill, pulling down the sleeve, reinstalling a new sleeve, machining a pin hole until the journal main body and the hole on the sleeve are concentric, and matching the stop pin according to the hole diameter for interference connection, when the stop pin is removed by drilling and the stop pin hole is re-machined by the method, the condition that the original connecting blind hole on the journal main body is enlarged by 0.4-0.5 mm exists, the stop pin needs to be re-matched, the production progress is influenced, the number of the stop pin which is small and only needs 3 stop pins which are required each time, great waste is caused by production preparation, material preparation, equipment occupation and the like, when the diameter of the pin connecting blind hole on the journal main body is increased by 1.5mm, the replacement is not allowed to continue and the whole part can only be scrapped.
Disclosure of Invention
The invention aims to provide a method for replacing a main body sleeve of a journal, which solves the defects of low efficiency and high material waste rate of the sleeve replacing method in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a method for replacing a main body sleeve of a journal, which comprises the following steps:
and 5, mounting the stop pin.
Preferably, in step 1, the retaining pin is removed using a pin remover.
Preferably, the concrete method for removing the stop pin by using the pin puller is as follows:
firstly, processing 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 retaining pin is removed using a pin puller with a threaded coupling.
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 joint blind hole on the journal main body is less than 0.8-1 mm.
Preferably, in step 3, when a new sleeve to be replaced is mounted on the journal body, the location of the locating hole is within the diameter range of the journal body pin coupling blind hole.
Preferably, the locating holes are located within the diameter of the journal body pin coupling blind holes using process locating pins.
Preferably, the difference between the outer diameter of the process positioning pin and the diameter of the positioning hole is 0.04-0.1 mm.
Preferably, in step 3, a dial indicator is used for aligning the position of the pin connection blind hole of the journal body.
Preferably, the pin connecting 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;
and (3) installing the dial indicator on the machine tool spindle, moving the machine tool spindle to enable the indicator head of the dial indicator to extend into the position of the pin connection blind hole on the journal main body through the sleeved positioning hole, and rotating the dial indicator for a circle and moving the machine tool spindle in combination until the change of the dial indicator meets the set threshold value.
Compared with the prior art, the invention has the beneficial effects that:
according to the replacing method of the journal main body sleeve, the position of the pin connecting blind hole in the journal main body is determined by using a method of directly measuring the position, the stop pin hole is machined in a new sleeve according to the position, the diameter of the pin connecting blind hole in the journal main body is not increased during machining of the stop pin hole, the stop pin does not need to be matched, the existing stop pin can be directly used for assembly, the replacing period is shortened by 50%, and the service life of the journal main body is prolonged to 10 times from the condition that only the journal main body can be scrapped after 3 times of sleeve replacement, so that a large amount of cost is saved.
In conclusion, the method ensures that the hole is processed along the original hole position when the hole is processed, and achieves the purpose of not damaging the original hole; 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 view of a prior art journal body and sleeve coupled using a retaining pin;
FIG. 2 is a schematic view of the thread specification in the center position of the retaining pin of the present invention;
FIG. 3 is a schematic view of the mounting sleeve and alignment and machining of the present invention;
the novel journal comprises a journal main body 1, a journal main body 2, a stop pin 3, a sleeve d, a pin connecting blind hole M on the journal main body, a thread specification d1 processed on the stop pin, an M thread small diameter h, an M thread small diameter depth 4, a new sleeve 5, a stop pin d2, a stop pin hole bottom hole diameter d3 on the new sleeve, a process positioning pin outer diameter d4 and a stop pin hole diameter on the new 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 a main sleeve of a journal provided by the invention comprises the following steps:
step 6, aligning the position of the pin connection blind hole on the journal main body, so that the original pin connection blind hole on the journal cannot be damaged when the pin connection hole on the sleeve is 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 stop pin hole after the processing is finished is equal to the aperture of the existing pin connecting blind hole on the journal main body.
And 7, mounting the stop pin.
In the step 1, the stop pin is removed through the pin puller, and the specific method comprises the following steps:
firstly, machining an internal thread bottom hole with the diameter d1 and the hole depth h at the central position of the stop pin; and (3) processing an internal thread M on the basis of the internal thread bottom hole, wherein 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.
Secondly, the stop pin is removed by using the pin puller through threaded connection, and the existing pin connection blind hole in the journal main body is prevented from being damaged.
In step 4, the aperture of the positioning hole
Wherein d is the diameter of the existing pin connection blind hole on the journal body.
In step 4, the positioning hole is positioned in the diameter range of the pin connection blind hole of the journal main body by utilizing the process positioning pin, wherein the outer diameter of the process positioning pin
And 6, aligning the position of the pin connection blind hole of the journal main body by using a dial indicator.
In step 6, the specific method for aligning the position of the pin connection blind hole on the journal body comprises the following steps:
s1, fixing the journal assembly of the mounting sleeve on a machine tool workbench;
and S2, mounting the dial indicator on the machine tool spindle, moving the machine tool spindle to enable the indicator head of the dial indicator to extend into the position of the pin connection blind hole on the journal main body through the sleeved positioning hole, and rotating the dial indicator for one circle and ensuring that the change of the dial indicator is within 0.002mm by combining with the moving machine tool spindle.
In step 6, the hole diameter d4 of the finished stopper pin hole is d.
The invention adopts a method of directly measuring the position through the process design to ensure that the hole is processed along the original hole position, thereby achieving the purpose of not damaging the original hole.
The traditional method is to directly process the positioning hole on the sleeve to be the same as the diameter of the pin connection blind hole on the journal main body, and then carry out press mounting to ensure concentricity.
Claims (10)
1. A method for replacing a main body sleeve of a shaft neck is characterized by comprising the following steps:
step 1, removing sleeves on a stop pin and a journal main body;
step 2, confirming the position of the 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 connection blind hole on the journal main body;
step 4, continuously processing the stop pin hole on the new sleeve to be replaced on the basis of the positioning hole, wherein the aperture of the stop pin hole after the processing is finished is equal to that of the existing pin connection blind hole on the journal main body;
and 5, mounting the stop pin.
2. The method of claim 1, wherein in step 1, the retaining pin is removed by a pin remover.
3. The method for replacing the main body sleeve of the journal as claimed in claim 2, wherein the specific method for removing the stop pin by using the pin extractor is:
firstly, processing 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 retaining pin is removed using a pin puller with a threaded coupling.
4. The method of claim 3, wherein the difference between the outer diameter of the internal thread and the outer diameter of the stop pin is less than 0.5mm to 1 mm.
5. The method for replacing the main body sleeve of the journal as claimed in claim 1, wherein in step 2, the difference between the diameter of the positioning hole and the diameter of the existing pin connection blind hole on the journal body is less than 0.8-1 mm.
6. The method of claim 1, wherein in step 3, the positioning hole is located within the diameter of the pin coupling blind hole of the journal body when a new sleeve to be replaced is mounted on the journal body.
7. The method of claim 6, wherein the locating holes are located within the diameter of the journal body pin coupling blind holes using process locating pins.
8. The method of claim 7, wherein the difference between the outer diameter of the process locating pin and the diameter of the locating hole is 0.04-0.1 mm.
9. The method for replacing the journal body sleeve according to claim 1, wherein in the step 3, the position of the journal body pin connection blind hole is aligned by using a dial indicator.
10. The method for replacing a journal body sleeve according to claim 1 or 9, wherein the position of the pin coupling blind hole on the journal body is aligned by:
fixing the journal assembly of the mounting sleeve on a machine tool workbench;
and (3) installing the dial indicator on the machine tool spindle, moving the machine tool spindle to enable the indicator head of the dial indicator to extend into the position of the pin connection blind hole on the journal main body through the sleeved positioning hole, and rotating the dial indicator for a circle and moving the machine tool spindle in combination until the change of the dial indicator meets the set threshold value.
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 true CN114654188A (en) | 2022-06-24 |
| CN114654188B 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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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100166492A1 (en) * | 2008-12-27 | 2010-07-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Security pin and method for making the same |
| 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100166492A1 (en) * | 2008-12-27 | 2010-07-01 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Security pin and method for making the same |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114654188B (en) | 2023-09-26 |
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