CN109237023B - Fabrication hole plugging structure and plugging method - Google Patents
Fabrication hole plugging structure and plugging method Download PDFInfo
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- CN109237023B CN109237023B CN201811103194.2A CN201811103194A CN109237023B CN 109237023 B CN109237023 B CN 109237023B CN 201811103194 A CN201811103194 A CN 201811103194A CN 109237023 B CN109237023 B CN 109237023B
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- fabrication hole
- chamfer
- plug
- welding
- plugging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Geometry (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a fabrication hole plugging structure and a plugging method, and belongs to the field of valve block machining processes. The plugging structure comprises a fabrication hole and an end cap, the end cap is inserted into the fabrication hole, a first chamfer is arranged on the inner wall of the fabrication hole, the slope of the first chamfer is arranged towards the opening of the fabrication hole, a second chamfer is arranged at one end of the end cap, the slope of the second chamfer is used for being abutted against the slope of the first chamfer in a sealing mode, the outer peripheral wall of the end cap is in threaded fit with the inner peripheral wall of the fabrication hole, a third chamfer is arranged at the opening of the fabrication hole, a welding space is formed by the end face of the other end of the third chamfer and the end cap, and a welding flux is filled. The invention can improve the plugging reliability of the fabrication hole.
Description
Technical Field
The invention belongs to the field of valve block machining processes, and particularly relates to a process hole plugging structure and a plugging method.
Background
The hydraulic valve block is a common hydraulic device, and a plurality of jacks are arranged on the outer wall of the hydraulic valve block and used for inserting control valves, so that integration of the control valves is realized.
In the process of manufacturing the hydraulic valve block, a fabrication hole needs to be arranged for assisting in the processing of the hydraulic valve block, and after the hydraulic valve block is processed, in order to avoid the influence of the fabrication hole on the sealing performance of the hydraulic valve block, the fabrication hole needs to be sealed and plugged by a plug.
However, the existing plug is very simple in structure, is usually installed together with a fabrication hole in a threaded fit mode, is low in plugging reliability, and is prone to sealing failure after a hydraulic valve block works for a long time.
Disclosure of Invention
The embodiment of the invention provides a fabrication hole plugging structure and a plugging method, which can improve the plugging reliability of a fabrication hole. The technical scheme is as follows:
on one hand, the blocking structure comprises a fabrication hole and a plug, wherein the plug is inserted into the fabrication hole, a first chamfer is arranged on the inner wall of the fabrication hole, the slope surface of the first chamfer faces the opening of the fabrication hole, a second chamfer is arranged at one end of the plug, the slope surface of the second chamfer is used for being abutted against the slope surface of the first chamfer in a sealing manner, the outer peripheral wall of the plug is in threaded fit with the inner peripheral wall of the fabrication hole, a third chamfer is arranged at the opening of the fabrication hole, a welding space is formed by the third chamfer and the end surface of the other end of the plug, and welding materials are filled in the welding space.
In an implementation manner of the invention, the plug comprises a sealing cylinder and an installation cylinder, the sealing cylinder and the installation cylinder are coaxially fixed together, the outer diameter of the sealing cylinder is smaller than the outer diameter of the installation cylinder, the second chamfer is arranged at one end of the sealing cylinder, which is back to the installation cylinder, the second chamfer is coaxially arranged with the sealing cylinder, and the outer peripheral wall of the installation cylinder is provided with an external thread which is in threaded fit with the inner peripheral wall of the fabrication hole.
In another implementation of the invention, an end face of the mounting cylinder facing away from the end of the sealing cylinder is provided with a tool engagement groove.
In yet another implementation of the invention, the tool-fitting groove is filled with the solder.
In yet another implementation of the present invention, the solder is flush with the opening of the process hole.
On the other hand, the embodiment of the invention provides a process hole plugging method, which is based on the plugging structure, and the plugging method comprises the following steps:
screwing the plug into the technical hole, so that the second chamfer is abutted against the first chamfer;
and welding the plug and the opening of the fabrication hole to fill the welding space with solder.
Optionally, screwing the plug into the fabrication hole includes:
inserting a tool into the tool fitting groove of the plug;
screwing the tool.
Optionally, welding the plug and the opening of the fabrication hole, includes:
and welding the plug and the opening of the fabrication hole through argon arc welding.
Optionally, welding the plug and the opening of the fabrication hole, further includes:
and welding the plug and the opening of the fabrication hole together along the slope of the third chamfer by using the axis of the fabrication hole as an axis of the welding gun for argon arc welding.
Optionally, the occlusion method further comprises:
and grinding the solder to enable the solder to be flush with the opening of the process hole.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
when the hydraulic valve block is plugged by the plugging structure provided by the embodiment of the invention, the plug is screwed into the technical hole in a thread matching mode, and the second chamfer of the plug is in sealing and abutting contact with the second chamfer of the technical hole, so that the sealing property between the plug and the technical hole is improved. And then the plug and the fabrication hole are welded together along the section of the third chamfer, and the welding space is filled with the welding flux, so that the plug and the fabrication hole form a whole, and the sealing property between the plug and the fabrication hole is further ensured. In other words, the plugging structure provided by the embodiment of the invention improves the plugging reliability between the plug and the fabrication hole and avoids the failure of the plugging structure after the hydraulic valve block works for a long time through the sealing and abutting between the first chamfer and the second chamfer and the filling of the solder in the welding space.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a cross-sectional view of a closure structure provided by an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a process orifice provided by an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a plug according to an embodiment of the present invention;
FIG. 4 is a flow chart of a process hole plugging method according to an embodiment of the present invention;
FIG. 5 is a flow chart of another process hole plugging method provided by an embodiment of the invention;
the symbols in the drawings represent the following meanings:
1-fabrication hole, 11-first chamfer, 12-third chamfer, 2-plug, 21-second chamfer, 22-sealing column, 23-mounting column, 24-tool matching groove, 3-welding material, 100-hydraulic valve block and a-external thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment of the invention provides a fabrication hole plugging structure which is used for plugging a hydraulic valve block 100. As shown in fig. 1, the plugging structure includes a fabrication hole 1 (see fig. 2) and a plug 2 (see fig. 3), the plug 2 is inserted in the fabrication hole 1, a first chamfer 11 is provided on the inner wall of the fabrication hole 1, a slope of the first chamfer 11 is arranged towards the opening of the fabrication hole 1, one end of the plug 2 is provided with a second chamfer 21, the slope of the second chamfer 21 is used for abutting against the slope of the first chamfer 11 in a sealing manner, the outer peripheral wall of the plug 2 is in threaded fit with the inner peripheral wall of the fabrication hole 1, the opening of the fabrication hole 1 is provided with a third chamfer 12, a welding space is formed by the third chamfer 12 and the end face of the other end of the plug 2, and the welding space is filled with a welding material.
When the hydraulic valve block 100 is plugged by the plugging structure provided by the embodiment of the invention, firstly, the plug 2 is screwed into the fabrication hole 1 in a thread matching manner, and the second chamfer 21 of the plug 2 is in sealing contact with the second chamfer 21 of the fabrication hole 1, so that the sealing property between the plug 2 and the fabrication hole 1 is improved. And then welding the plug 2 and the fabrication hole 1 together along the section of the third chamfer 12, and filling the welding space with the welding flux 3, so that the plug 2 and the fabrication hole 1 form a whole, and the sealing property between the plug 2 and the fabrication hole 1 is further ensured. That is to say, according to the plugging structure provided by the embodiment of the present invention, the sealing between the first chamfer 11 and the second chamfer 21 is balanced, and the solder 3 in the welding space is filled, so that the plugging reliability between the plug 2 and the fabrication hole 1 is improved, and the plugging structure is prevented from failing after the hydraulic valve block 100 works for a long time.
Referring to fig. 3, in the present embodiment, the plug 2 includes a sealing cylinder 22 and a mounting cylinder 23, the sealing cylinder 22 and the mounting cylinder 23 are coaxially fixed together, an outer diameter of the sealing cylinder 22 is smaller than an outer diameter of the mounting cylinder 23, a second chamfer 21 is provided at an end of the sealing cylinder 22 facing away from the mounting cylinder 23, the second chamfer 21 is coaxially arranged with the sealing cylinder 22, and an outer circumferential wall of the mounting cylinder 23 is provided with an outer thread a for threadedly engaging with an inner circumferential wall of the fabrication hole 1.
In the above implementation manner, the plug 2 is divided into two parts, namely the sealing cylinder 22 and the mounting cylinder 23, the second chamfer 21 is arranged on the sealing cylinder 22, and the external thread a is arranged on the mounting cylinder 23, so that the second chamfer 21 and the external thread a are separately arranged, and further mutual interference between the external thread a and the second chamfer 21 is avoided, and the plugging effect on the plug 2 is influenced. In addition, the second chamfer 21 and the external thread a are separately arranged, so that the processing of the plug 2 can be facilitated, and the production efficiency is improved.
In addition, since the outer diameter of the sealing cylinder 22 is smaller than that of the mounting cylinder 23, the tool can be easily withdrawn when the plug 2 is machined.
Alternatively, the sealing cylinder 22 and the mounting cylinder 23 may be of unitary construction, thereby improving the structural integrity of the plug 2 and facilitating the manufacture of the plug 2.
In this embodiment, an end surface of the mounting cylinder 23 facing away from the end of the sealing cylinder 22 is provided with a tool fitting groove 24.
In the above implementation, the tool engagement groove 24 is used to engage a tool to screw the plug 2. In this embodiment, the tool engagement slot 24 may be a strip-shaped slot for engaging a flat screwdriver, in other embodiments, the tool engagement slot 24 may be a cross-shaped slot for engaging a cross-screwdriver, and the invention is not limited to the specific shape of the tool engagement slot 24.
Optionally, the tool fitting groove 24 is filled with the solder 3, so that the welding area between the fabrication hole 1 and the plug 2 is further increased, and the plugging reliability is further improved.
In the present embodiment, the solder 3 is flush with the opening of the via 1.
In the above implementation manner, by means of polishing, after the strip solder 3 is cooled and formed, the solder 3 overflowing the welding space is polished off, so that the solder 3 is flush with the opening of the fabrication hole 1, thereby facilitating the subsequent nickel plating of the hydraulic valve block 100.
Fig. 4 is a flowchart of a process hole plugging method according to an embodiment of the present invention, where the plugging method is based on the plugging structure shown in fig. 1, and referring to fig. 4, the plugging method includes:
step 101: the plug 2 is screwed into the fabrication hole 1 so that the second chamfer 21 abuts against the first chamfer 11.
Step 102: and welding the plug 2 and the opening of the fabrication hole 1, so that the welding space is filled with welding flux 3.
When the hydraulic valve block 100 is plugged by the plugging method provided by the embodiment of the invention, firstly, the plug 2 is screwed into the fabrication hole 1 in a thread matching manner, and the second chamfer 21 of the plug 2 is in sealing contact with the second chamfer 21 of the fabrication hole 1, so that the sealing property between the plug 2 and the fabrication hole 1 is improved. And then welding the plug 2 and the fabrication hole 1 together along the section of the third chamfer 12, and filling the welding space with the welding flux 3, so that the plug 2 and the fabrication hole 1 form a whole, and the sealing property between the plug 2 and the fabrication hole 1 is further ensured. That is to say, according to the plugging structure provided by the embodiment of the present invention, the sealing between the first chamfer 11 and the second chamfer 21 is balanced, and the solder 3 in the welding space is filled, so that the plugging reliability between the plug 2 and the fabrication hole 1 is improved, and the plugging structure is prevented from failing after the hydraulic valve block 100 works for a long time.
Fig. 5 is a flowchart of another process hole plugging method according to an embodiment of the present invention, where the plugging method is based on the plugging structure shown in fig. 1, and referring to fig. 5, the plugging method includes:
step 201: the plug 2 is screwed into the fabrication hole 1 so that the second chamfer 21 abuts against the first chamfer 11.
Specifically, step 201 may be implemented by:
first, a tool is inserted into the tool engagement groove 24 of the plug 2.
The tool is then screwed until the second chamfer 21 abuts the first chamfer 11.
In this way, the screwing of the plug 2 can be facilitated, so as to ensure that the first chamfer 11 abuts against the second chamfer 21.
In the above implementation, the tool engagement groove 24 is used to engage a tool to screw the plug 2. In this embodiment, the tool engagement slot 24 may be a strip-shaped slot for engaging a flat screwdriver, in other embodiments, the tool engagement slot 24 may be a cross-shaped slot for engaging a cross-screwdriver, and the invention is not limited to the specific shape of the tool engagement slot 24.
Step 202: and welding the plug 2 and the opening of the fabrication hole 1, so that the welding space is filled with welding flux 3.
Optionally, the plug 2 and the opening of the fabrication hole 1 are welded by argon arc welding.
Thus, the adverse effects of oxygen, nitrogen, hydrogen, etc. in the air on the arc and the molten pool can be isolated by the argon gas introduced during welding, so that the dense, splash-free and high-quality solder 3 can be obtained in the welding space.
Specifically, step 202 may be implemented by:
and (3) welding the plug 2 and the opening of the fabrication hole 1 together along the slope of the third chamfer 12 by using the axis of the fabrication hole 1 as an axis of the welding gun for argon arc welding.
In the above implementation, the solder 3 in the molten state will gradually flow to the middle of the soldering space along the cross section of the third chamfer 12 under the action of gravity until the whole soldering space is filled.
Step 203: the solder 3 is ground so that the solder 3 is flush with the opening of the tooling hole 1.
In this way, the integrity of the occluding structure may be improved to facilitate performance of step 204.
Step 204: the hydraulic valve block 100 is integrally nickel-plated.
Therefore, the corrosion resistance of the plugging structure can be improved, and the reliability of the plugging structure is further ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A fabrication hole plugging structure comprises a fabrication hole and a plug, wherein the plug is inserted into the fabrication hole, and the fabrication hole plugging structure is characterized in that a first chamfer is arranged on the inner wall of the fabrication hole, the slope surface of the first chamfer is arranged towards the opening of the fabrication hole, a second chamfer is arranged at one end of the plug, the slope surface of the second chamfer is used for being in sealing abutment with the slope surface of the first chamfer, the outer peripheral wall of the plug is in threaded fit with the inner peripheral wall of the fabrication hole, a third chamfer is arranged at the opening of the fabrication hole, a welding space is formed by the third chamfer and the end surface of the other end of the plug, and a welding flux is filled in the welding space;
the plug comprises a sealing cylinder and an installation cylinder, the sealing cylinder and the installation cylinder are coaxially fixed together, the outer diameter of the sealing cylinder is smaller than that of the installation cylinder, the second chamfer is arranged at one end, back to the installation cylinder, of the sealing cylinder, the second chamfer is coaxially arranged with the sealing cylinder, and external threads used for being in threaded fit with the inner peripheral wall of the fabrication hole are arranged on the outer peripheral wall of the installation cylinder;
the sealing cylinder and the mounting cylinder are of an integrated structure;
the end face of one end, back to the sealing column body, of the mounting column body is provided with a tool matching groove, and the tool matching groove is used for matching a tool;
the tool matching groove is filled with the solder;
the solder is flush with the opening of the fabrication hole.
2. A process hole plugging method, wherein the plugging method is based on the plugging structure of claim 1, and the plugging method comprises:
screwing the plug into the technical hole, so that the second chamfer is abutted against the first chamfer;
and welding the plug and the opening of the fabrication hole to fill the welding space with solder.
3. The plugging method according to claim 2, wherein screwing the plug into the fabrication hole comprises:
inserting a tool into the tool fitting groove of the plug;
screwing the tool.
4. The plugging method according to claim 2, wherein welding the plug and the opening of the fabrication hole comprises:
and welding the plug and the opening of the fabrication hole through argon arc welding.
5. The plugging method according to claim 4, wherein the step of welding the plug and the opening of the fabrication hole further comprises the steps of:
and welding the plug and the opening of the fabrication hole together along the slope of the third chamfer by using the axis of the fabrication hole as an axis of the welding gun for argon arc welding.
6. The occlusion method of claim 2, further comprising:
and grinding the solder to enable the solder to be flush with the opening of the process hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811103194.2A CN109237023B (en) | 2018-09-20 | 2018-09-20 | Fabrication hole plugging structure and plugging method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811103194.2A CN109237023B (en) | 2018-09-20 | 2018-09-20 | Fabrication hole plugging structure and plugging method |
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| Publication Number | Publication Date |
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| CN109237023A CN109237023A (en) | 2019-01-18 |
| CN109237023B true CN109237023B (en) | 2021-06-08 |
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| CN201811103194.2A Active CN109237023B (en) | 2018-09-20 | 2018-09-20 | Fabrication hole plugging structure and plugging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112317929B (en) * | 2020-11-05 | 2022-05-24 | 上海宝冶工程技术有限公司 | Hole plugging welding process |
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| CN106969143A (en) * | 2016-01-13 | 2017-07-21 | 哈尔滨飞机工业集团有限责任公司 | A kind of thin-walled unthreaded hole sealing device |
| CN108035731A (en) * | 2017-12-05 | 2018-05-15 | 徐州徐工基础工程机械有限公司 | A kind of cantilevered rock tunnel(ling) machine hard rock cutting arm |
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| US5033426A (en) * | 1990-08-22 | 1991-07-23 | Cummins Engine Company, Inc. | Radial combustion seal |
| KR101244873B1 (en) * | 2009-10-01 | 2013-03-19 | 한국델파이주식회사 | Retainer applied in alternate generator of car |
| US10690059B2 (en) * | 2016-09-26 | 2020-06-23 | General Electric Company | Advanced seals with reduced corner leakage |
| CN207229740U (en) * | 2017-08-14 | 2018-04-13 | 厦门艾斯霖橡塑科技有限公司 | Seal for pipe joints circle |
| CN207316069U (en) * | 2017-08-31 | 2018-05-04 | 安徽江淮汽车集团股份有限公司 | Manual plugging apparatus |
| CN207365792U (en) * | 2017-09-30 | 2018-05-15 | 博格思众（常州）热交换器有限公司 | A kind of blocking cap for header |
| CN107830301A (en) * | 2017-11-29 | 2018-03-23 | 苏州水博士建材科技有限公司 | A kind of duct closing type device |
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2018
- 2018-09-20 CN CN201811103194.2A patent/CN109237023B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969143A (en) * | 2016-01-13 | 2017-07-21 | 哈尔滨飞机工业集团有限责任公司 | A kind of thin-walled unthreaded hole sealing device |
| CN108035731A (en) * | 2017-12-05 | 2018-05-15 | 徐州徐工基础工程机械有限公司 | A kind of cantilevered rock tunnel(ling) machine hard rock cutting arm |
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| CN109237023A (en) | 2019-01-18 |
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