CN110280974A - The production method of oil sealing baffle - Google Patents
The production method of oil sealing baffle Download PDFInfo
- Publication number
- CN110280974A CN110280974A CN201910358413.XA CN201910358413A CN110280974A CN 110280974 A CN110280974 A CN 110280974A CN 201910358413 A CN201910358413 A CN 201910358413A CN 110280974 A CN110280974 A CN 110280974A
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- China
- Prior art keywords
- plate
- ring plate
- panel
- outer ring
- interior
- Prior art date
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Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of production methods of oil sealing baffle, belong to field of machining.Production method includes: to provide two baffle component groups, and baffle component group includes panel, outer panel, outer ring plate, interior plate and inner ring plate；Interior plate and outer panel are rolled as semicircular configuration part；Inner ring plate is welded in the inner side edge of interior plate, so that inner ring plate and interior plate are coaxially arranged, and the inward flange of inner ring plate is aligned with the inner side edge of interior plate；Outer ring plate is welded in the outer side edges of interior plate, so that outer ring plate and interior plate are coaxially arranged, and the inward flange of outer ring plate is aligned with the outer side edges of interior plate；Outer panel is welded in the outer edge of outer ring plate, so that outer panel and outer ring plate are coaxially arranged, and the inner side edge of outer panel is aligned with the outer edge of outer ring plate；Panel is welded in the inner side edge of outer side plate, so that panel is coaxially arranged with outer panel；Two baffle component groups are installed together, oil sealing baffle is obtained.Stock utilization when production oil sealing baffle can be improved in the present invention.
Description
Technical field
The invention belongs to field of machining, in particular to a kind of production method of oil sealing baffle.
Background technique
Oil sealing baffle is a kind of machine components, is used to install oil sealing, there is relatively broad application in machinery field.
Common oil sealing baffle is usually obtained by monolith thick plates cutting, welding, when causing to make oil sealing baffle, material use
Rate is lower, and takes a long time.
Summary of the invention
The embodiment of the invention provides a kind of production methods of oil sealing baffle, and material when production oil sealing baffle can be improved
Utilization rate.The technical solution is as follows:
The embodiment of the invention provides a kind of production method of oil sealing baffle, the production method includes:
Two baffle component groups are provided, the baffle component group includes panel, outer panel, outer ring plate, interior plate and inner ring
Plate；
The interior plate and the outer panel are rolled as semicircular configuration part；
The inner ring plate is welded in the inner side edge of the interior plate, so that the inner ring plate and the coaxial cloth of the interior plate
It sets, and the inward flange of the inner ring plate is aligned with the inner side edge of the interior plate；
The outer ring plate is welded in the outer side edges of the interior plate, so that the outer ring plate and the coaxial cloth of the interior plate
It sets, and the inward flange of the outer ring plate is aligned with the outer side edges of the interior plate；
The outer panel is welded in the outer edge of the outer ring plate, so that the outer panel and the coaxial cloth of the outer ring plate
It sets, and the inner side edge of the outer panel is aligned with the outer edge of the outer ring plate；
The panel is welded in the inner side edge of the outer panel, so that the panel and the outer panel are coaxially arranged；
Two baffle component groups are installed together, the oil sealing baffle is obtained.
It is described before the inner side edge of the interior plate welds the inner ring plate in a kind of implementation of the invention
Production method further include:
Support arm is fixed on the interior plate after rolling, the support arm is fixed on the inner sidewall of the interior plate
On, and the support arm is perpendicular to the perpendicular bisector of the interior plate.
In another implementation of the invention, support arm is fixed on the interior plate after rolling, comprising:
By way of spot welding on the inner sidewall that the both ends of the support arm are fixed on the interior plate.
In another implementation of the invention, the inner ring plate is welded in the inner side edge of the interior plate, comprising:
According to the size of the interior plate after rolling, the first assembly contour line is drawn on the end face of the inner ring plate；
According to the first assembly contour line, the interior plate and the inner ring plate are assembled together；
The interior plate being assembled together and the inner ring plate are welded together.
In another implementation of the invention, the outer ring plate is welded in the outer side edges of the interior plate, comprising:
According to the size of the interior plate after rolling, the second assembly contour line is drawn on the end face of the outer ring plate；
According to the second assembly contour line, the interior plate and the outer ring plate are assembled together；
The interior plate being assembled together and the outer ring plate are welded together.
In another implementation of the invention, the outer panel is welded in the outer edge of the outer ring plate, comprising:
The outer edge of the outer ring plate and the inner sidewall of the outer panel are offseted；
The position between the outer ring plate and the outer panel is adjusted, so that the outer edge of the outer ring plate and the outside
The inner side edge of plate is aligned；
The inner side edge of the outer edge of the outer ring plate and the outer panel is welded together.
In another implementation of the invention, the panel is welded in the inner side edge of the outer panel, comprising:
According to the size of the outer panel after rolling, third is drawn on the end face of the panel and assembles contour line；
Contour line is assembled according to the third, by the outer panel together with the panel-mounted；
The outer panel being assembled together and the panel are welded together.
In another implementation of the invention, two baffle component groups are installed together, comprising:
Four connecting plates are provided；
Two connecting plates are separately fixed on the both ends of an outer ring plate, and two connecting plates are located at
On same plane；
Connecting plate described in another two is separately fixed on the both ends of another outer ring plate, and is connected described in another two
Plate is in the same plane；
By two connections on two connecting plates and another described outer ring plate on an outer ring plate
Plate links together.
In another implementation of the invention, the production method further include:
By bolt and nut component, by two connecting plates and another described outer ring plate on an outer ring plate
On two connecting plates link together.
In another implementation of the invention, the production method further include:
Connector is provided；
Mounting hole is set on an outer panel；
By the weld on the mounting hole, so that the connector is connected to the mounting hole.
Technical solution provided in an embodiment of the present invention has the benefit that
It, will be interior by providing panel, outer panel, outer ring plate, interior plate and inner ring plate included by two baffle component groups
Ring flat-plate and outer ring plate are respectively welded at the inner side edge and outer side edges of interior plate, and outer panel is welded on to the outer edge of outer ring plate, will
Panel is welded on the inner side edge of outer panel, to obtain two baffle component groups.Then by two baffle component group connection installations
Together, oil sealing baffle is obtained.That is, production method provided by the present invention, oil sealing baffle is split in order to multiple small
Part (such as panel, outer panel, outer ring plate, interior plate and inner ring plate), then in particular order will be each with positional relationship
Small part welding assembly together, to obtain oil sealing baffle, it is possible to preferably utilize making material, avoid making material
Waste, reduce the production cost.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of flow chart of the production method of oil sealing baffle provided in an embodiment of the present invention；
Fig. 2 is the welding schematic diagram of interior plate provided in an embodiment of the present invention；
Fig. 3 is the welding schematic diagram of outer panel provided in an embodiment of the present invention；
Fig. 4 is the welding schematic diagram of panel provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of oil sealing baffle provided in an embodiment of the present invention；
Fig. 6 is the flow chart of the production method of another oil sealing baffle provided in an embodiment of the present invention；
Fig. 7 is the scheme of installation of support arm provided in an embodiment of the present invention；
Fig. 8 is the welding schematic diagram of connector provided in an embodiment of the present invention；
Each symbol indicates that meaning is as follows in figure:
1, panel；2, outer panel；3, outer ring plate；4, interior plate；5, inner ring plate；6, support arm；7, connector；8, connecting plate；
A, mounting hole.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
The embodiment of the invention provides a kind of production methods of oil sealing baffle, as shown in Figure 1, the production method includes:
Step 101: providing two baffle component groups, baffle component group includes panel 1, outer panel 2, outer ring plate 3, interior plate
4 and inner ring plate 5.
Step 102: interior plate 4 and outer panel 2 are rolled as semicircular configuration part.
Step 103: inner ring plate 5 is welded in the inner side edge of interior plate 4, so that inner ring plate 5 and interior plate 4 are coaxially arranged, and
The inward flange of inner ring plate 5 is aligned (referring to fig. 2) with the inner side edge of interior plate 4.
Step 104: outer ring plate 3 is welded in the outer side edges of interior plate 4, so that outer ring plate 3 and interior plate 4 are coaxially arranged, and
The inward flange of outer ring plate 3 is aligned (referring to fig. 2) with the outer side edges of interior plate 4.
Step 105: outer panel 2 is welded in the outer edge of outer ring plate 3, so that outer panel 2 and outer ring plate 3 are coaxially arranged, and
The inner side edge of outer panel 2 is aligned (referring to Fig. 3) with the outer edge of outer ring plate 3.
Step 106: panel 1 is welded in the inner side edge of outer side plate 2, so that panel 1 and outer panel 2 are coaxially arranged (referring to figure
4)。
Step 107: two baffle component groups being installed together, oil sealing baffle is obtained (referring to Fig. 5).
By providing panel 1, outer panel 2, outer ring plate 3, interior plate 4 and inner ring plate 5 included by two baffle component groups,
Inner ring plate 5 and outer ring plate 3 are respectively welded to the inner side edge and outer side edges of interior plate 4, outer panel 2 is welded on outer ring plate 3
Panel 1, is welded on the inner side edge of outer panel 2 by outer edge, to obtain two baffle component groups.Then by two baffle components
Group connection is installed together, and obtains oil sealing baffle.That is, production method provided by the present invention, oil sealing baffle is split
For multiple small parts (such as panel 1, outer panel 2, outer ring plate 3, interior plate 4 and inner ring plate 5), then in particular order
Together with positional relationship is by each small part welding assembly, to obtain oil sealing baffle, it is possible to making material is preferably utilized,
The waste for avoiding making material, reduces the production cost.
Fig. 6 is the production method of another oil sealing baffle provided in an embodiment of the present invention, referring to Fig. 6, the production method packet
It includes:
Step 201: providing two baffle component groups, baffle component group includes panel 1, outer panel 2, outer ring plate 3, interior plate
4 and inner ring plate 5.
In above-mentioned implementation, oil sealing baffle is split as two baffle component groups, and baffle component group is further
Ground is split as multiple small parts, i.e. panel 1, outer panel 2, outer ring plate 3, interior plate 4 and inner ring plate 5, enables making material
It is fully utilized, avoids the waste of making material, reduce the production cost.
Step 202: interior plate 4 and outer panel 2 are rolled as semicircular configuration part.
In specific implementation, interior plate 4 and outer panel 2 can be obtained by the steel plate of crimped machine crimped strip, from
And it ensure that the producing efficiency of oil sealing baffle.
Step 203: support arm 6 is fixed on interior plate 4, support arm 6 is fixed on the inner sidewall of interior plate 4, and is supported
Perpendicular bisector of the arm 6 perpendicular to interior plate 4 (referring to Fig. 7).
This way it is possible to avoid interior plate 4 generates welding deformation in subsequent welding sequence, the system of oil sealing baffle is improved
Make yield.
Illustratively, can by way of spot welding on the inner sidewall that the both ends of support arm 6 are fixed on interior plate 4, from
And ensure that firm installation of the support arm 6 on interior plate 4, but also not only convenient for after welding sequence, by support arm 6 from inside
It is disassembled on plate 4.
Step 204: inner ring plate 5 is welded in the inner side edge of interior plate 4, so that inner ring plate 5 and interior plate 4 are coaxially arranged, and
The inward flange of inner ring plate 5 is aligned (referring to fig. 2) with the inner side edge of interior plate 4.
Illustratively, interior plate 4 and inner ring plate 5 are mutually perpendicular to arrange, the inner side edge of interior plate 4 and the end face of inner ring plate 5
It offsets.
Optionally, step 204 is realized by following steps:
Firstly, drawing the first assembly contour line on the end face of inner ring plate 5 according to the size of the interior plate 4 after rolling.
When specific implementation, the first assembly contour curve can be drawn out by marking pen or respectively on inner ring plate 5.
Then, according to the first assembly contour line, interior plate 4 and inner ring plate 5 are assembled together.
In this way, the assembly precision between interior plate 4 and inner ring plate 5 can be improved, the production yield of oil sealing baffle is improved.
Finally, the interior plate 4 being assembled together and inner ring plate 5 are welded together.
Step 205: outer ring plate 3 is welded in the outer side edges of interior plate 4, so that outer ring plate 3 and interior plate 4 are coaxially arranged, and
The inward flange of outer ring plate 3 is aligned (referring to fig. 2) with the outer side edges of interior plate 4.
Illustratively, interior plate 4 and outer ring plate 3 are mutually perpendicular to arrange, the outer side edges of interior plate 4 and the end face of outer ring plate 3
It offsets.
Optionally, step 205 is realized by following steps:
Firstly, drawing the second assembly contour line on the end face of outer ring plate 3 according to the size of the interior plate 4 after rolling.
When specific implementation, the drafting mode of the second assembly contour line and aforementioned first assembly contour line are essentially identical, herein
It does not repeat them here.
Then, according to the second assembly contour line, interior plate 4 and outer ring plate 3 are assembled together.
In this way, the assembly precision between interior plate 4 and outer ring plate 3 can be improved, the production yield of oil sealing baffle is improved.
Finally, the interior plate 4 being assembled together and outer ring plate 3 are welded together.
Step 206: outer panel 2 is welded in the outer edge of outer ring plate 3, so that outer panel 2 and outer ring plate 3 are coaxially arranged, and
The inner side edge of outer panel 2 is aligned (referring to Fig. 3) with the outer edge of outer ring plate 3.
Optionally, step 206 is realized by following steps:
Firstly, the outer edge of outer ring plate 3 and the inner sidewall of outer panel 2 are offseted.
Then, the position between outer ring plate 3 and outer panel 2 is adjusted, so that the outer edge of outer ring plate 3 and outer panel 2 is interior
Side alignment.
In above-mentioned implementation, since the size of outer panel 2 and outer ring plate 3 is larger, so before welding, needing
Manual setting relative position between the two, to guarantee the inner side edge alignment of the outer edge and outer panel 2 of outer ring plate 3.
Finally, the inner side edge of the outer edge of outer ring plate 3 and outer panel 2 is welded together.
Step 207: panel 1 is welded in the inner side edge of outer side plate 2, so that panel 1 and outer panel 2 are coaxially arranged (referring to figure
4)。
Optionally, step 207 is realized by following steps:
Firstly, drawing third according to the size of the outer panel 2 after rolling on the end face of panel 1 and assembling contour line.
When specific implementation, the drafting mode of third assembly contour line and aforementioned first assembly contour line are essentially identical, herein
It does not repeat them here.
Then, contour line is assembled according to third, outer panel 2 and panel 1 is assembled together.
In this way, the assembly precision between outer panel 2 and panel 1 can be improved, the production yield of oil sealing baffle is improved.
Finally, the outer panel 2 being assembled together and panel 1 are welded together.
Step 208: the erection joint 7 on an outer panel 2 (referring to Fig. 8).
In this manner it is achieved that the draining of oil sealing baffle.
Optionally, step 208 is realized by following steps:
Firstly, providing connector 7.
Then, mounting hole a is set on an outer panel 2.
Finally, connector 7 is welded on mounting hole a, so that connector 7 is connected to mounting hole a.
In this manner it is achieved that the firm installation between connector 7 and outer panel 2.
Step 209: two baffle component groups being installed together, oil sealing baffle is obtained (referring to Fig. 5).
Optionally, step 207 is realized by following steps:
Firstly, providing four connecting plates 8.
Then, two connecting plates 8 are separately fixed on the both ends of an outer ring plate 3, and two connecting plates 8 are positioned at same
In plane.
Then, another two connecting plate 8 is separately fixed on the both ends of another outer ring plate 3, and another two connecting plate 8
In on same plane.
Finally, two connecting plates 8 on two connecting plates 8 and another outer ring plate 3 on an outer ring plate 3 are connected to
Together.
Illustratively, can by bolt and nut component, by an outer ring plate 3 two connecting plates 8 and another outside
Two connecting plates 8 on ring flat-plate 3 link together.
By providing panel 1, outer panel 2, outer ring plate 3, interior plate 4 and inner ring plate 5 included by two baffle component groups,
Inner ring plate 5 and outer ring plate 3 are respectively welded to the inner side edge and outer side edges of interior plate 4, outer panel 2 is welded on outer ring plate 3
Panel 1, is welded on the inner side edge of outer panel 2 by outer edge, to obtain two baffle component groups.Then by two baffle components
Group connection is installed together, and obtains oil sealing baffle.That is, production method provided by the present invention, oil sealing baffle is split
For multiple small parts (such as panel 1, outer panel 2, outer ring plate 3, interior plate 4 and inner ring plate 5), then in particular order
Together with positional relationship is by each small part welding assembly, to obtain oil sealing baffle, it is possible to making material is preferably utilized,
The waste for avoiding making material, reduces the production cost.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of production method of oil sealing baffle, which is characterized in that the production method includes:
Two baffle component groups are provided, the baffle component group includes panel, outer panel, outer ring plate, interior plate and inner ring plate；
The interior plate and the outer panel are rolled as semicircular configuration part；
The inner ring plate is welded in the inner side edge of the interior plate, so that the inner ring plate and the interior plate are coaxially arranged, and
The inward flange of the inner ring plate is aligned with the inner side edge of the interior plate；
The outer ring plate is welded in the outer side edges of the interior plate, so that the outer ring plate and the interior plate are coaxially arranged, and
The inward flange of the outer ring plate is aligned with the outer side edges of the interior plate；
The outer panel is welded in the outer edge of the outer ring plate, so that the outer panel and the outer ring plate are coaxially arranged, and
The inner side edge of the outer panel is aligned with the outer edge of the outer ring plate；
The panel is welded in the inner side edge of the outer panel, so that the panel and the outer panel are coaxially arranged；
Two baffle component groups are installed together, the oil sealing baffle is obtained.
2. manufacturing method according to claim 1, which is characterized in that weld the inner ring in the inner side edge of the interior plate
Before plate, the production method further include:
Support arm is fixed on the interior plate after rolling, the support arm is fixed on the inner sidewall of the interior plate, and
Perpendicular bisector of the support arm perpendicular to the interior plate.
3. production method according to claim 2, which is characterized in that the fixed support on the interior plate after rolling
Arm, comprising:
By way of spot welding on the inner sidewall that the both ends of the support arm are fixed on the interior plate.
4. production method according to claim 1-3, which is characterized in that welded in the inner side edge of the interior plate
The inner ring plate, comprising:
According to the size of the interior plate after rolling, the first assembly contour line is drawn on the end face of the inner ring plate；
According to the first assembly contour line, the interior plate and the inner ring plate are assembled together；
The interior plate being assembled together and the inner ring plate are welded together.
5. production method according to claim 1-3, which is characterized in that welded in the outer side edges of the interior plate
The outer ring plate, comprising:
According to the size of the interior plate after rolling, the second assembly contour line is drawn on the end face of the outer ring plate；
According to the second assembly contour line, the interior plate and the outer ring plate are assembled together；
The interior plate being assembled together and the outer ring plate are welded together.
6. production method according to claim 1-3, which is characterized in that welded in the outer edge of the outer ring plate
The outer panel, comprising:
The outer edge of the outer ring plate and the inner sidewall of the outer panel are offseted；
The position between the outer ring plate and the outer panel is adjusted, so that the outer edge of the outer ring plate and the outer panel
Inner side edge alignment；
The inner side edge of the outer edge of the outer ring plate and the outer panel is welded together.
7. production method according to claim 1-3, which is characterized in that welded in the inner side edge of the outer panel
The panel, comprising:
According to the size of the outer panel after rolling, third is drawn on the end face of the panel and assembles contour line；
Contour line is assembled according to the third, by the outer panel together with the panel-mounted；
The outer panel being assembled together and the panel are welded together.
8. production method according to claim 1-3, which is characterized in that install two baffle component groups
Together, comprising:
Four connecting plates are provided；
Two connecting plates are separately fixed on the both ends of an outer ring plate, and two connecting plates are positioned at same
In plane；
Connecting plate described in another two is separately fixed on the both ends of another outer ring plate, and connecting plate position described in another two
In on same plane；
Two connecting plates on two connecting plates and another described outer ring plate on one outer ring plate are connected
It is connected together.
9. production method according to claim 8, which is characterized in that the production method further include:
It, will be on two connecting plates and another described outer ring plate on an outer ring plate by bolt and nut component
Two connecting plates link together.
10. production method according to claim 1-3, which is characterized in that the production method further include:
Connector is provided；
Mounting hole is set on an outer panel；
By the weld on the mounting hole, so that the connector is connected to the mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358413.XA CN110280974B (en) | 2019-04-30 | 2019-04-30 | Method for manufacturing oil seal baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910358413.XA CN110280974B (en) | 2019-04-30 | 2019-04-30 | Method for manufacturing oil seal baffle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110280974A true CN110280974A (en) | 2019-09-27 |
| CN110280974B CN110280974B (en) | 2021-05-11 |
Family
ID=68001518
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910358413.XA Active CN110280974B (en) | 2019-04-30 | 2019-04-30 | Method for manufacturing oil seal baffle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58184028A (en) * | 1982-04-23 | 1983-10-27 | Komatsu Ltd | Manufacture of parent body of seal ring of floating seal |
| CN1442334A (en) * | 2003-02-26 | 2003-09-17 | 成都铁华电子科技实业有限公司 | Monufacturing method of locomotive gear box and its locomotive gear box |
| CN103273281A (en) * | 2013-06-20 | 2013-09-04 | 中航虹波风电设备有限公司 | Construction technology for thin-wall barrel bodies |
| CN106984950A (en) * | 2017-05-23 | 2017-07-28 | 上海东富龙制药设备制造有限公司 | A kind of manufacture method of cleaning machine gear-box |
| CN107498267A (en) * | 2017-09-14 | 2017-12-22 | 东莞市琏柏五金制品有限公司 | A kind of mobile phone center and its preparation technology |
-
2019
- 2019-04-30 CN CN201910358413.XA patent/CN110280974B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58184028A (en) * | 1982-04-23 | 1983-10-27 | Komatsu Ltd | Manufacture of parent body of seal ring of floating seal |
| CN1442334A (en) * | 2003-02-26 | 2003-09-17 | 成都铁华电子科技实业有限公司 | Monufacturing method of locomotive gear box and its locomotive gear box |
| CN103273281A (en) * | 2013-06-20 | 2013-09-04 | 中航虹波风电设备有限公司 | Construction technology for thin-wall barrel bodies |
| CN106984950A (en) * | 2017-05-23 | 2017-07-28 | 上海东富龙制药设备制造有限公司 | A kind of manufacture method of cleaning machine gear-box |
| CN107498267A (en) * | 2017-09-14 | 2017-12-22 | 东莞市琏柏五金制品有限公司 | A kind of mobile phone center and its preparation technology |
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| Publication number | Publication date |
|---|---|
| CN110280974B (en) | 2021-05-11 |
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