CN112077530B - Method for correcting bolt hole dislocation in bolt connecting assembly - Google Patents
Method for correcting bolt hole dislocation in bolt connecting assembly Download PDFInfo
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- CN112077530B CN112077530B CN201910505947.0A CN201910505947A CN112077530B CN 112077530 B CN112077530 B CN 112077530B CN 201910505947 A CN201910505947 A CN 201910505947A CN 112077530 B CN112077530 B CN 112077530B
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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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
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Abstract
The invention discloses a method for correcting bolt hole dislocation in a bolt connecting assembly, which relates to the technical field of mechanical assembly. The method for correcting the dislocation of the bolt holes in the bolt connecting assembly has the advantages of high assembling precision, convenience in later-stage replacement, high connecting strength and easiness in positioning of the center.
Description
Technical Field
The invention relates to the technical field of mechanical assembly, in particular to a method for correcting bolt hole dislocation in a bolt connecting assembly.
Background
In the connection of the bolt connecting assembly, due to the fact that the bolt holes are staggered due to various factors such as low machining precision, positioning errors and human errors of the connected piece, part of bolts in the bolt connecting assembly cannot be installed on the connected piece. At present, two main solutions are available to the skilled person, the first is to ream the hole by milling, drilling, etc. to relax the assembly accuracy, and the second is to change the bolted connection to a welded connection. However, these methods have the technical problems of difficult center positioning, low assembly precision, inconvenient later replacement, insufficient connection strength and the like.
Disclosure of Invention
The invention aims to provide a method for correcting bolt hole dislocation in a bolt connecting assembly, which has the characteristics of high assembly precision, convenience in later-stage replacement, high connecting strength and easiness in positioning of the center.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for correcting bolt hole misalignment in a bolt coupling assembly, the bolt coupling assembly including a first coupled member, a second coupled member, and a bolt, the first coupled member being provided with a plurality of first bolt holes, the second coupled member being provided with a plurality of second bolt holes, the first coupled member and the second coupled member being coupled by the plurality of bolts, the method comprising the steps of:
s1: a plurality of setting marks are carved on the first plate body by using nail bodies placed in first bolt holes of the first connected piece, and each setting mark is the hole center position of one first bolt hole;
s2: a plurality of through holes with the set marks as centers are manufactured on the second plate body;
s3: placing the second plate body on a second connected piece, ensuring that the second bolt hole which is not misplaced on the second connected piece is superposed with the through hole corresponding to the second plate body, and reaming the position of the misplaced second bolt hole on the second connected piece by taking the through hole of the second plate body as a reference;
s4: and installing a bushing in the second reamed bolt hole.
Optionally, the first attached component is a calibration reference standard and the second attached component is an attached component with dimensional deviation.
Optionally, the nail body in the step S1 includes:
the outer diameter of the nail body is equal to the diameter of the first bolt hole of the first connected piece in size;
the nail head is connected with the nail body and is a cone, and the nail head carves the setting mark on the first plate body through the tip of the nail head.
Optionally, the maximum cross-section of the head is greater than the cross-section of the shank.
Optionally, the hardness of the first plate body is lower than the hardness of the second plate body.
Optionally, the first plate body is an aluminum plate, and the second plate body is a steel plate.
Optionally, in step S4, the outer diameter of the bushing is equal to the second bolt hole diameter after the second connected member is reamed, and the inner diameter of the bushing is equal to the second bolt hole diameter before the second connected member is reamed.
Optionally, the bushing is connected with the second connected piece in an interference fit manner.
Optionally, in step S4, the bushing is cooled and then placed in the second bolt hole after reaming.
Compared with the prior art, the invention has the technical effects that: the method comprises the steps of carving setting marks on a first plate body by using a nail body placed in a first bolt hole of a first connected piece, wherein the setting marks are multiple, each setting mark is the hole center position of one first bolt hole, manufacturing multiple through holes with the setting marks as the centers on a second plate body, placing the second plate body on a second connected piece, ensuring that the second bolt hole which is not staggered on the second connected piece is superposed with the through hole corresponding to the second plate body, reaming the position of the staggered second bolt hole on the second connected piece by using the through hole of the second plate body as a reference, and placing a bushing into the reamed second bolt hole. The method for correcting the dislocation of the bolt holes in the bolt connecting assembly has the advantages of high assembling precision, convenience in later-stage replacement, high connecting strength and easiness in positioning of the center.
Drawings
FIG. 1 is a flow chart of a method for correcting bolt hole misalignment in a bolt connection assembly provided by an embodiment of the present invention;
FIG. 2 is a schematic structural view of a bolt connection assembly provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a bushing provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic structural view of a nail body provided by the embodiment of the invention;
fig. 5 is a schematic structural diagram of a first plate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second plate according to an embodiment of the present invention.
Description of reference numerals:
the bolt connecting assembly comprises a bolt connecting assembly-1, a first connected piece-11, a second connected piece-12, a bolt-13, a nail body-2, a nail body-21, a nail head-22, a first plate body-3, a second plate body-4 and a bushing-5.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
A method for correcting bolt hole misalignment in a bolt connecting assembly according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
The invention provides a method for correcting bolt hole dislocation in a bolt connecting assembly 1, as shown in fig. 1, the bolt connecting assembly 1 comprises a first connected piece 11, a second connected piece 12 and bolts 13, the first connected piece 11 is provided with a plurality of first bolt holes, the second connected piece 12 is provided with a plurality of second bolt holes, the first connected piece 11 and the second connected piece 12 are connected through a plurality of bolts 13, the method comprises the following steps:
s1: a plurality of setting marks are carved on the first plate body 3 by using the nail body 2 placed in the first bolt hole of the first connected piece 11, and each setting mark is the hole center position of one first bolt hole;
it can be understood that the hole center positions of the first bolt holes on the first connected member 11 can be accurately positioned by engraving the hole center positions of the first bolt holes on the first plate body 3 by the nail body 2. In addition, it should be noted that the area of the first plate body 3 is large enough to meet the mark setting of any number of first bolt holes; the hardness of first plate body 3 is lower, is convenient for carve down first bolt hole on the first connected piece 11, observes the distribution of first bolt hole more clearly.
S2: a plurality of through holes with a set mark as the center are made on the second plate body 4;
it can be understood that, since the radius of the first bolt hole on the first connected component 11 is known, the second plate 4 is provided with a plurality of through holes at the center by the set mark engraved on the first plate 3 by the nail body 2, and the diameters of the through holes and the first bolt hole are the same, and the error is almost zero.
Here, the second plate 4 and the first plate 3 have the same size, and the second plate 4 can cover all the number of first bolt holes. The first plate 3 and the second plate 4 are generally rectangular in shape, but in other embodiments of the present invention, the shape of the first plate 3 and the second plate 4 may be selected according to specific needs.
S3: placing the second plate body 4 on the second connected piece 12, ensuring that a second bolt hole which is not staggered on the second connected piece 12 is superposed with a through hole corresponding to the second plate body 4, and reaming the position of the staggered second bolt hole on the second connected piece 12 by taking the through hole of the second plate body 4 as a reference;
it can be understood that the second plate body 4 with a plurality of through holes is placed on the second connected piece 12, because the second connected piece 12 has the second bolt hole that misplaces, and there is also the second bolt hole that does not misplace simultaneously, guarantee that the second connected piece 12 does not have the second bolt hole that misplaces and the through hole coincidence that the second plate body 4 corresponds, the second bolt hole that has the dislocation then must have size deviation with the through hole of the second plate body 4, will have the position of the second bolt hole that misplaces on the second connected piece 12 at this moment and carry out reaming.
Note that the second bolt hole after the hole enlargement is enlarged in a certain ratio to the second bolt hole before the hole enlargement, and the center position of the second bolt hole after the hole enlargement is the same as the center position of the first bolt hole corresponding to the first connected member 11.
S4: the bushing 5 is fitted into the second bolt hole after reaming.
It can be understood that, when the bushing 5 is installed in the second bolt hole with the offset enlarged hole, the size and the center position of the second bolt hole matched with the bushing 5 are the same as those of the first bolt hole, and the first connected member 11 and the second connected member 12 can be matched and connected in a complete matching manner through the bolt 13, so that the problem of the offset of the bolt holes in the bolt connecting assembly 1 is solved.
In conclusion, the method has the advantages of high assembly precision, convenience in later-stage replacement, high connection strength and easiness in center positioning.
Alternatively, as shown in fig. 2, the first attached member 11 is a calibration reference standard, and the second attached member 12 is an attached member having a dimensional deviation.
It will be appreciated that the first coupled member 11 is typically a fixed non-detachable member, so the first coupled member 11 is set as a calibration reference standard; the second coupled member 12 is generally an easy adjustment and operation member, so the second coupled member 12 serves as a coupled member for correction of a counterbore with respect to the first coupled member 11. Of course, in other embodiments of the present invention, the first attached member 11 may be used as an attached member having dimensional deviation, and the second attached member 12 may be used as a calibration reference standard.
Alternatively, as shown in fig. 4, the shank 2 in step S1 includes a shank 21 and a head 22, and the outer diameter of the shank 21 is equal to the first bolt hole diameter of the first connected member 11. The nail head 22 is connected with the nail body 21, the nail head 22 is a cone, and the nail head 22 carves a set mark on the first plate body 3 through the tip of the nail head 22.
It can be understood that the set mark is carved by the tip of the nail body 2, which helps to center the first bolt hole and facilitates the operation. In addition, the outer diameter of the nail body 21 is equal to the first bolt hole diameter of the first connected member 11, so that the nail body and the first connected member can be completely tightly matched, the setting mark at the moment is the central position of the first bolt hole, and the positioning error is reduced to a certain extent. The nail body 2 is made of a material with high hardness, and is not easy to deform in the using process.
Advantageously, the number of shank 2 is greater than or equal to the number of bolts 13.
Advantageously, the shank 21 is provided on its outside with an external thread which cooperates with an internal thread of the first bolt hole. Thereby, the nail body 2 is conveniently fitted in the first bolt hole to carve the setting mark.
Alternatively, as shown in fig. 4, the maximum cross-section of the head 22 is larger than the cross-section of the shank 21. It should be noted here that the maximum cross-sectional end surface of the stud 22 abuts against the surface of the first connected component 11, so as to prevent the stud 22 from entering the first bolt hole, and facilitate the engraving of the setting mark at the tip of the stud 22.
Alternatively, as shown in fig. 5 to 6, the hardness of the first plate body 3 is lower than that of the second plate body 4.
It should be noted here that the hardness of the first plate 3 is low, which is beneficial for marking the tip of the nail head 22 on the first plate 3, and is convenient for people to position. The hardness of the second plate body 4 is high, and the second plate body is not easy to deform when being used as a drilling reference of the second connected piece 12, so that the problems of size error and position deviation are reduced.
Alternatively, the first plate body 3 is an aluminum plate and the second plate body 4 is a steel plate. The aluminum plate has lower hardness, which is beneficial to the setting of marks on the tip of the nail head 22 at the first plate body 3, and is convenient for people to position; the steel plate has high hardness, is not easy to deform when being used as a drilling reference of the second connected piece 12, and reduces the problems of size error and position deviation. Of course, in other embodiments of the present invention, the material selection of the first plate body 3 and the second plate body 4 may be adjusted according to specific situations, and is not limited to aluminum plates and steel plates.
Alternatively, as shown in fig. 3, in step S4, the outer diameter of the bush 5 is equal to the second bolt hole diameter after the second coupled member 12 is reamed, and the inner diameter of the bush 5 is equal to the second bolt hole diameter before the second coupled member 12 is reamed. The assembling device has the advantages of high assembling precision and small size error.
Optionally, the bushing 5 is connected with the second connected member 12 by interference fit. The assembly precision is improved in a certain degree, and errors are reduced. It should be noted that the inner side wall of the bushing 5 has an internal thread matching the external thread of the bolt.
Advantageously, the height of the bush 5 and the height of the second connected piece 12 are equal.
Alternatively, in step S4, the bushing 5 is cooled and then placed in the second bolt hole after hole enlargement. According to the principle of thermal expansion and cold contraction, firstly, the cooled bushing 5 is placed into the second bolt hole after reaming, after the bushing 5 recovers to normal temperature, the bushing 5 and the second connected piece 12 are connected in an interference fit mode, and the center of the bushing 5 at the moment is the center of the corrected second bolt hole.
The method has wide applicability and has certain reference significance for dislocation problems in the assembling process of different fields.
Example (b):
a method for correcting bolt hole misalignment in a bolt connecting assembly 1 according to one embodiment of the present invention will now be described with reference to fig. 1 to 6.
The method for correcting the bolt hole dislocation in the bolt connecting assembly 1 is characterized in that the bolt connecting assembly 1 comprises a first connected piece 11, a second connected piece 12 and bolts 13, a plurality of first bolt holes are formed in the first connected piece 11, a plurality of second bolt holes are formed in the second connected piece 12, the first connected piece 11 and the second connected piece 12 are connected through the bolts 13, the first connected piece 11 is a correction reference standard piece, and the second connected piece 12 is a connected piece with size deviation. The method comprises the following steps:
s1: a plurality of setting marks are carved on the first plate body 3 by using the nail body 2 placed in the first bolt hole of the first connected piece 11, and each setting mark is the hole center position of one first bolt hole;
s2: a plurality of through holes with a set mark as the center are made on the second plate body 4;
s3: placing the second plate body 4 on the second connected piece 12, ensuring that a second bolt hole which is not staggered on the second connected piece 12 is superposed with a through hole corresponding to the second plate body 4, and reaming the position of the staggered second bolt hole on the second connected piece 12 by taking the through hole of the second plate body 4 as a reference;
s4: the bushing 5 is fitted into the second bolt hole after reaming.
The nail body 2 in the step S1 includes a nail body 21 and a nail head 22, the outer diameter of the nail body 21 is equal to the first bolt hole diameter of the first connected member 11, the nail head 22 is connected with the nail body 21, the nail head 22 is a cone, and the nail head 22 carves a set mark on the first plate 3 through the tip of the nail head 22. The maximum cross-section of the head 22 is larger than the cross-section of the shank 21. The hardness of the first plate body 3 is lower than that of the second plate body 4. The first plate body 3 is an aluminum plate, and the second plate body 4 is a steel plate. In step S4, the outer diameter of the bush 5 is equal to the second bolt hole diameter after the second coupling member 12 is enlarged and the inner diameter of the bush 5 is equal to the second bolt hole diameter before the second coupling member 12 is enlarged. The bush 5 is connected with the second connected member 12 by interference fit. In step S4, the bushing 5 is cooled and then placed in the second bolt hole after the hole enlargement.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (9)
1. A method for correcting bolt hole misalignment in a bolt connection assembly, the bolt connection assembly (1) comprising a first connected member (11), a second connected member (12) and a bolt (13), the first connected member (11) being provided with a plurality of first bolt holes, the second connected member (12) being provided with a plurality of second bolt holes, the first connected member (11) and the second connected member (12) being connected by a plurality of the bolts (13), the method comprising the steps of:
s1: a plurality of setting marks are carved on the first plate body (3) by using the nail body (2) placed in the first bolt hole of the first connected piece (11), and each setting mark is the hole center position of one first bolt hole;
s2: a plurality of through holes with the set marks as centers are manufactured on the second plate body (4);
s3: placing the second plate body (4) on a second connected piece (12), ensuring that the second bolt hole which is not dislocated on the second connected piece (12) is superposed with the through hole corresponding to the second plate body (4), and reaming the position of the dislocated second bolt hole on the second connected piece (12) by taking the through hole of the second plate body (4) as a reference;
s4: and (5) installing a bushing (5) into the second bolt hole after reaming.
2. Method for correcting bolt hole misalignments in a bolt connection assembly according to claim 1, characterised in that the first connected piece (11) is a correcting reference standard and the second connected piece (12) is a dimensionally deviating connected piece.
3. The method for correcting bolt hole misalignment in a bolt-connecting assembly according to claim 1, wherein the shank (2) in the step S1 includes:
the outer diameter of the nail body (21) is equal to the diameter of the first bolt hole;
the nail head (22), the nail head (22) is connected with the nail body (21), the nail head (22) is a cone, and the nail head (22) carves the setting mark on the first plate body (3) through the tip of the nail head.
4. A method for correcting bolt hole misalignment in a bolt connection assembly according to claim 3 wherein the maximum cross section of the head (22) is greater than the cross section of the shank (21).
5. Method for correcting bolt hole misalignments in a bolt connection assembly according to claim 1, characterised in that the hardness of the first plate body (3) is lower than the hardness of the second plate body (4).
6. Method for correcting bolt hole misalignments in a bolt-on-bolt assembly according to claim 1, characterised in that the first plate body (3) is an aluminium plate and the second plate body (4) is a steel plate.
7. The method for correcting bolt hole misalignment in a bolt-connecting assembly according to claim 1, wherein in step S4, the outer diameter of the bush (5) is equal to the second bolt hole diameter after the second connected member (12) is reamed, and the inner diameter of the bush (5) is equal to the second bolt hole diameter before the second connected member (12) is reamed.
8. Method for correcting bolt hole misalignments in a bolt connection assembly according to claim 1, characterised in that the bushing (5) is connected with an interference fit with the second connected piece (12).
9. The method for correcting bolt hole misalignment in a bolt-connecting assembly according to claim 8, wherein in step S4, the bushing (5) is cooled and placed in the second bolt hole after reaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505947.0A CN112077530B (en) | 2019-06-12 | 2019-06-12 | Method for correcting bolt hole dislocation in bolt connecting assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910505947.0A CN112077530B (en) | 2019-06-12 | 2019-06-12 | Method for correcting bolt hole dislocation in bolt connecting assembly |
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| Publication Number | Publication Date |
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| CN112077530A CN112077530A (en) | 2020-12-15 |
| CN112077530B true CN112077530B (en) | 2021-11-05 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004141977A (en) * | 2002-10-22 | 2004-05-20 | Rifutekku Kk | Method for adjusting position deviation of connection member attachment hole, and adjustment tool |
| CN201198560Y (en) * | 2008-05-09 | 2009-02-25 | 中铁十二局集团有限公司 | Device for controlling and correcting bridge contact net basic pre-embedded bolt space |
| CN104148875A (en) * | 2014-08-14 | 2014-11-19 | 广西鱼峰集团有限公司 | Deviation rectification device for reamed bolt holes and manufacturing method of deviation rectification device |
| CN105880936A (en) * | 2015-09-10 | 2016-08-24 | 上海江南长兴重工有限责任公司 | Bolt machining method |
| CN106677386A (en) * | 2017-03-15 | 2017-05-17 | 镇江力点锚固有限公司 | Improved screw-in type back bolt |
| CN206486997U (en) * | 2017-02-21 | 2017-09-12 | 甘为民 | The inclined calibration bolt erecting device of steel structure node component hole |
-
2019
- 2019-06-12 CN CN201910505947.0A patent/CN112077530B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004141977A (en) * | 2002-10-22 | 2004-05-20 | Rifutekku Kk | Method for adjusting position deviation of connection member attachment hole, and adjustment tool |
| CN201198560Y (en) * | 2008-05-09 | 2009-02-25 | 中铁十二局集团有限公司 | Device for controlling and correcting bridge contact net basic pre-embedded bolt space |
| CN104148875A (en) * | 2014-08-14 | 2014-11-19 | 广西鱼峰集团有限公司 | Deviation rectification device for reamed bolt holes and manufacturing method of deviation rectification device |
| CN105880936A (en) * | 2015-09-10 | 2016-08-24 | 上海江南长兴重工有限责任公司 | Bolt machining method |
| CN206486997U (en) * | 2017-02-21 | 2017-09-12 | 甘为民 | The inclined calibration bolt erecting device of steel structure node component hole |
| CN106677386A (en) * | 2017-03-15 | 2017-05-17 | 镇江力点锚固有限公司 | Improved screw-in type back bolt |
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