CN112916968B - Threaded hole repairing method - Google Patents
Threaded hole repairing method Download PDFInfo
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- CN112916968B CN112916968B CN202110119837.8A CN202110119837A CN112916968B CN 112916968 B CN112916968 B CN 112916968B CN 202110119837 A CN202110119837 A CN 202110119837A CN 112916968 B CN112916968 B CN 112916968B
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- thread
- threaded hole
- head
- hole
- mounting hole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G9/00—Working screws, bolt heads, or nuts in conjunction with thread cutting, e.g. slotting screw heads or shanks, removing burrs from screw heads or shanks; Finishing, e.g. polishing, any screw-thread
- B23G9/009—Thread cleaning or repairing
-
- 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
- B23P6/00—Restoring or reconditioning objects
Abstract
The application relates to a threaded hole repairing method, which comprises the following steps: reaming a threaded hole to be repaired on the workpiece and machining a first thread to form a mounting hole; installing a blocking head in the installation hole, wherein a second thread on the blocking head is in matched connection with the first thread; cutting off the part of the blocking head protruding out of the mounting hole so that the blocking head is flush with the outer end face of the mounting hole; and processing a target threaded hole. The difficult prosthetic problem of present screw hole can be solved to this scheme.
Description
Technical Field
The invention relates to the technical field of threaded hole repair, in particular to a threaded hole repair method.
Background
The in-process of machining screw hole often can appear that the screw thread profile damages, leads to no-go gage inspection not to close, the threaded hole has casting defect scheduling problem, needs threaded connection's generally all be zonulae occludens, has certain requirement to the intensity of screw thread, if the threaded hole appear above-mentioned problem can reduce threaded connection's intensity to the insecure quality risk of threaded connection can appear.
In order to avoid potential influence caused by the damage of the thread hole tooth shape and other problems, the thread hole with quality problems is usually required to be repaired, the common repair scheme has the embedding and blocking repair, the embedding and blocking repair belongs to an embedded repair scheme, but the existing repair scheme needs to consider the influence factors in multiple aspects such as material problems, connection mode problems, blank allowance problems, size problems and the like, and the multidimensional influence factors increase the difficulty and the cost of the repair scheme.
Disclosure of Invention
In view of this, it is necessary to provide a method for repairing a threaded hole, which is directed to the problem that the threaded hole is difficult to repair.
In order to solve the problems, the invention adopts the following technical scheme:
the embodiment of the invention discloses a threaded hole repairing method, which comprises the following steps:
reaming a threaded hole to be repaired on the workpiece and machining a first thread to form a mounting hole;
installing a blocking head in the installation hole, wherein a second thread on the blocking head is in matched connection with the first thread;
cutting off the part of the sealing head protruding out of the mounting hole so as to enable the sealing head to be flush with the outer side end face of the mounting hole;
and processing a target threaded hole.
In one embodiment, the blocking head comprises a connected threaded section and a straight rod section, the threaded section is provided with the second thread, and at least part of the straight rod section is in interference fit with the opening of the mounting hole under the condition that the second thread is in fit connection with the first thread.
In one of these embodiments, the outside end of shutoff head is provided with the handle, install the shutoff head in the mounting hole, and the second screw thread on the shutoff head with first screw thread fit connection specifically includes:
screwing at least part of the stopper head into the mounting hole by the handle.
In one embodiment, before the installing the plugging head in the installation hole and the second thread on the plugging head being in fit connection with the first thread, the method further includes:
and coating thread tooth fixing glue on the first threads.
In one embodiment, the thread tooth-fixing glue is a loctite glue.
In one embodiment, the reaming the threaded hole to be repaired in the workpiece and machining the first thread to form the mounting hole specifically includes:
measuring the wall thickness of the threaded hole;
and expanding and drilling the mounting hole according to the wall thickness of the threaded hole.
In one embodiment, the blocking head is a solid rod-shaped member.
In one embodiment, the material of the blocking head is the same as that of the workpiece.
In one embodiment, the material of the plugging head is nodular cast iron.
The technical scheme adopted by the invention can achieve the following beneficial effects:
in the threaded hole repairing method disclosed by the embodiment of the invention, the threaded hole to be repaired is subjected to reaming and tapping, so that the threaded hole can be matched with the plugging head, the plugging head is connected with the formed mounting hole in a threaded connection mode, and the target threaded hole is further re-processed. Compared with other plugging modes, the embodiment disclosed by the invention has the characteristics of simple structure, convenience in use, firmness in plugging and the like, so that plugging and repairing of the threaded hole can be quickly realized, the difficulty and cost of plugging and repairing the threaded hole are reduced, and the repairing effect of the threaded hole is improved.
Drawings
Fig. 1 is a schematic structural view of a plugging head plugging a mounting hole according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a target threaded hole after being machined and formed according to an embodiment of the present invention.
Description of reference numerals:
600-a sealing head, 610-a thread section, 620-a straight rod section and 630-a handle;
700-workpiece.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "top," "bottom," "top," and the like are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1-2, an embodiment of the present invention discloses a method for repairing a threaded hole, where the method specifically includes:
s100, reaming the threaded hole needing to be repaired in the workpiece 700 and machining a first thread to form a mounting hole. In specific working process, which threaded holes on the workpiece 700 need to be repaired can be detected firstly, then the threaded holes which need to be repaired are reamed through the drilling machine, further, the formed inner hole can be tapped, and finally, a mounting hole is formed, so that subsequent plugging work is facilitated.
S200, installing the blocking head 600 in the installation hole, and enabling a second thread on the blocking head 600 to be connected with the first thread in a matched mode. In this case, the second thread on the plugging head 600 matches with the first thread in the mounting hole, so that the plugging head 600 can be screwed into the mounting hole to plug the mounting hole.
And S300, cutting off the part of the blocking head 600 protruding out of the mounting hole so that the blocking head 600 is flush with the outer end face of the mounting hole. Specifically, the excessive part of the plugging head 600 protruding from the mounting hole may be cut by using a cutting tool or a grinding wheel, so that the plugging head 600 is flush with the outer end face of the mounting hole, thereby ensuring the appearance quality of the workpiece 700.
And S400, processing a target threaded hole. Firstly, holes can be drilled, of course, the plugging head 600 can be drilled, or holes can be drilled in other places, the positions of the drilled holes can be determined according to the specific positions of the target threaded holes, then tapping is carried out, and finally the target threaded holes are formed.
As can be seen from the above, in the threaded hole repairing method disclosed in the embodiment of the present invention, the threaded hole to be repaired is expanded and drilled and tapped, so that the threaded hole can be matched with the plugging head 600, the plugging head 600 is connected with the formed mounting hole in a threaded connection manner, and the target threaded hole is re-machined. Compared with other plugging modes, the embodiment disclosed by the invention has the characteristics of simple structure, convenience in use, firmness in plugging and the like, so that plugging and repairing of the threaded hole can be quickly realized, the difficulty and cost of plugging and repairing the threaded hole are reduced, and the repairing effect of the threaded hole is improved.
It should be noted that, in the threaded hole repairing method disclosed in the embodiment of the present invention, not only the threaded hole may be repaired to process the target threaded hole, but also the threaded hole drilled in the workpiece 700 by a deviation or an error may be plugged, which is not limited in the embodiment of the present invention.
In the embodiment of the present invention, the plugging head 600 may include the connected threaded section 610 and the straight rod section 620, the threaded section 610 may have the second thread, and under the condition that the second thread is in fit connection with the first thread, that is, under the condition that the plugging head 600 plugs the mounting hole, at least a part of the straight rod section 620 may be in interference fit with the opening of the mounting hole, so that not only the plugging firmness of the plugging head 600 may be improved, but also the plugging effect of the plugging head 600 may be better, so as to prevent the first thread or the second thread from being exposed outside the mounting hole, and further, the appearance performance of the workpiece 700 may be ensured.
In the embodiment of the present invention, the outer end of the plugging head 600 may be provided with a handle 630, and the step S200 may specifically include:
s210, screwing at least a portion of the plugging head 600 into the mounting hole by the handle 630. This kind of mode can install shutoff head 600 in the mounting hole fast to can further reduce the degree of difficulty and the cost that stifled reprocessed is inlayed to the screw hole, in order to promote the restoration effect to the screw hole. In an alternative embodiment, the handle 630 may be a bolt, and the operator may manually turn the handle 630 by a wrench to locate at least a portion of the plugging head 600 in the mounting hole, so as to simplify the plugging process and facilitate the operation.
In the embodiment of the present disclosure, before the step S200, the method may further include:
and S500, coating thread tooth fixing glue on the first threads. The thread tooth fixing glue can improve the installation stability of the plugging head 600 in the installation hole, so that the phenomenon that the plugging head 600 is loosened or falls off can be better prevented. Of course, under the condition that the first thread coated with the thread tooth fixing glue is matched with the second thread in a connecting mode, the thread tooth fixing glue can be placed for a period of time, for example, 24 hours, so that the thread tooth fixing glue can be completely dried, and then the next operation is carried out, and the mode can enable the bonding effect of the thread tooth fixing glue to be better. Further, in a specific plugging process, the second thread may also be coated with a thread tooth fixing glue, so that the installation stability of the plugging head 600 is better.
In an alternative embodiment, the thread-setting adhesive may be a loctite adhesive. The letai glue can play a better fastening and sealing effect to guarantee the installation stability of the plugging head 600. Of course, the thread tooth fixing glue may also be other kinds of glue, and the embodiment of the present invention is not limited thereto.
In an embodiment of the present invention, the step S100 may specifically include:
and S110, measuring the wall thickness of the threaded hole. Whether the threaded hole needs to be expanded and drilled can be determined by measuring the wall thickness of the threaded hole, and when the wall thickness of the threaded hole is too small to expand and drill, the threaded hole can be repaired in a welding mode and the like; and the required reaming amount of the threaded hole can be determined so as to facilitate subsequent operation.
And S120, drilling the mounting hole according to the wall thickness of the threaded hole.
According to the mode, the threaded hole can be more accurately expanded, so that the difficulty and cost increase caused by too large expansion of the threaded hole can be prevented, and the waste of materials of the plugging head 600 can be prevented; the blocking head 600 and the target threaded hole can be prevented from being damaged when the target threaded hole is machined again, and therefore the reliability of the insert blocking is affected.
Further, to facilitate determining the final parameters of the plugging head 600, see table 1 below. In table 1 below: the parameter A expresses the aperture of a target threaded hole; parameter B represents the length of the plugging head 600; the parameter D represents the outer diameter of the plugging head 600. Moreover, in the following table 1, not only the parameters of different apertures corresponding to the same kind of target holes are provided, but also the application parameters of different kinds of target holes are included, for example, the target holes may be threaded holes, through holes and NPT (National (American) Pipe Thread, american standard spinal canal) threaded holes, and the worker may select a proper plugging head 600 according to the specific aperture of the target hole to be processed, so that not only the difficulty and cost increase due to too large drilling for the threaded hole can be better prevented, but also the material of the plugging head 600 is prevented from being wasted; the blocking head 600 and the target threaded hole can be prevented from being damaged when the target threaded hole is machined again, and therefore the reliability of the insert blocking is affected.
TABLE 1
In the embodiment of the present invention, the plug 600 may be a solid rod-shaped member, the strength of the plug 600 with this structure is relatively high, so that the plug is not easily broken, and the plug 600 with this structure is also convenient for forming the target threaded hole.
In the embodiment disclosed by the invention, in an optional embodiment, the material of the plug can be the same as that of the workpiece 700, so that the problems of stress concentration and insufficient strength of the material can be avoided.
In another optional embodiment, the material of the plugging head 600 may be nodular cast iron, and the plugging head 600 made of the material may be suitable for some workpieces 700 which are complex in stress and have high requirements on strength, toughness and wear resistance, and is suitable for being used as a raw material for plugging. For example, the material of the plugging head 600 may be nodular cast iron 400, and the carbon content may be 3.0-4.0%. Of course, the material of the blocking head 600 may be other types, which is not limited in this embodiment of the present invention.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method of repairing a threaded hole, comprising:
reaming a threaded hole to be repaired on the workpiece and machining a first thread to form a mounting hole;
installing a blocking head in the installation hole, wherein a second thread on the blocking head is in matched connection with the first thread;
cutting off the part of the blocking head protruding out of the mounting hole so that the blocking head is flush with the outer end face of the mounting hole;
processing a target threaded hole;
the blocking head comprises a thread section and a straight rod section which are connected, the thread section is provided with the second thread, and at least part of the straight rod section is in interference fit with the opening of the mounting hole under the condition that the second thread is in fit connection with the first thread.
2. The threaded hole repairing method according to claim 1, wherein a handle is arranged at an outer end of the blocking head, the blocking head is installed in the installation hole, and the matching connection of the second thread on the blocking head and the first thread specifically comprises:
screwing at least part of the stopper head into the mounting hole by the handle.
3. The method for repairing a threaded hole according to claim 1, wherein before the step of mounting the plugging head to the mounting hole and the step of connecting the second thread of the plugging head with the first thread in a matching manner, the method further comprises the following steps:
and coating thread tooth fixing glue on the first threads.
4. A method of repairing a threaded hole as defined in claim 3 wherein said thread bond adhesive is a loctite adhesive.
5. The threaded hole repairing method according to claim 1, wherein the reaming of the threaded hole to be repaired in the workpiece and the machining of the first thread to form the mounting hole specifically comprise:
measuring the wall thickness of the threaded hole;
and expanding and drilling the mounting hole according to the wall thickness of the threaded hole.
6. A method of repairing a threaded hole as defined in claim 1 wherein said plugging head is a solid rod member.
7. The method for repairing a threaded hole according to claim 1, wherein the material of the plugging head is the same as the material of the workpiece.
8. The method for repairing a threaded hole according to claim 1, wherein the material of the plugging head is nodular cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119837.8A CN112916968B (en) | 2021-01-29 | 2021-01-29 | Threaded hole repairing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110119837.8A CN112916968B (en) | 2021-01-29 | 2021-01-29 | Threaded hole repairing method |
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| Publication Number | Publication Date |
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| CN112916968A CN112916968A (en) | 2021-06-08 |
| CN112916968B true CN112916968B (en) | 2023-02-10 |
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| CN113756826B (en) * | 2021-09-29 | 2022-07-12 | 中铁一局集团有限公司 | Method for repairing screw hole of normal-pressure cutter head cutter barrel of slurry balance shield tunneling machine |
| CN114770027A (en) * | 2022-04-25 | 2022-07-22 | 中国铁建高新装备股份有限公司 | Axle repairing method and axle |
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| CN1911590A (en) * | 2006-08-31 | 2007-02-14 | 中国南车集团戚墅堰机车车辆厂 | Fast repairing method of internal screw |
| CN101954563A (en) * | 2010-05-26 | 2011-01-26 | 南车戚墅堰机车有限公司 | Repairing method for leakage of installation screw hole on installation surface of integration box |
| CN102909519B (en) * | 2012-11-21 | 2015-12-23 | 南车戚墅堰机车有限公司 | The restorative procedure of machine body cylinder screw |
| CN105773056A (en) * | 2014-12-13 | 2016-07-20 | 重庆霸腾机械有限公司 | Repair process for inner screw hole of cast iron gear |
| CN105537849A (en) * | 2015-12-29 | 2016-05-04 | 中车洛阳机车有限公司 | Method for restoring threaded hole of locomotive axle box pull rod seat |
| CN105522324A (en) * | 2016-01-20 | 2016-04-27 | 潍柴动力(潍坊)再制造有限公司 | Restoring method for bushing melting defect of camshaft bottom hole of cylinder block and engine cylinder block |
| CN109514172B (en) * | 2018-11-19 | 2020-04-14 | 德阳东汽电站机械制造有限公司 | Method for repairing threaded hole by bushing |
| CN209239078U (en) * | 2018-11-28 | 2019-08-13 | 四川鸿舰重型机械制造有限责任公司 | Lathe knife seat structure of mosaic |
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Effective date of registration: 20230103 Address after: 750021 550 Beijing West Road, Xixia District, Yinchuan, the Ningxia Hui Autonomous Region Applicant after: KOCEL MACHINERY Ltd. Address before: 298, ningshuo South Street, Yinchuan economic and Technological Development Zone, Ningxia Hui Autonomous Region Applicant before: KOCEL INTELLIGENT EQUIPMENT Co.,Ltd. |
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