CN106424395A - Expanding and necking processing mould for pipe fittings - Google Patents
Expanding and necking processing mould for pipe fittings Download PDFInfo
- Publication number
- CN106424395A CN106424395A CN201610360495.8A CN201610360495A CN106424395A CN 106424395 A CN106424395 A CN 106424395A CN 201610360495 A CN201610360495 A CN 201610360495A CN 106424395 A CN106424395 A CN 106424395A
- Authority
- CN
- China
- Prior art keywords
- mould
- core
- die
- internal expanding
- expanding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000463 material Substances 0.000 claims abstract description 17
- 230000000630 rising Effects 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims 1
- 230000001681 protective Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000003028 elevating Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/02—Enlarging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/08—Dies with different parts for several steps in a process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
Abstract
The invention relates to an expanding and necking processing mould for pipe fittings. The expanding and necking processing mould comprises a material taking mechanism, a necking mould, an expanding mould cover plate, an expanding mould, a drawbar, a mould base and an expanding core base, wherein the material taking mechanism comprises a material taking lifting base, an air cylinder, a first expanding core and a first inner expanding mould; an inner expanding mould cover plate and an inner expanding mould bottom plate are arranged outside the first inner expanding mould; a tapered sleeve and the necking mould cover plate are arranged outside the necking mould; a pipe fitting outer protective plate is arranged in the necking mould; a second expanding core is arranged in the second inner expanding mould; a plurality of expanding mould springs and plugs are sequentially arranged between the expanding mould and a retainer ring; a third expanding core is arranged in the expanding mould; an inner expanding mould spring is arranged outside the drawbar; and each of the first inner expanding mould, the necking mould, the second inner expanding mould and the expanding mould consists of a plurality of mould pieces. The expanding and necking processing mould can automatically take materials for carrying out processing of simultaneously expanding one end of each pipe fitting and necking the other end of each pipe fitting, so that outlines of barrel parts of the pipe fittings are prevented from being affected by end part processing, and therefore, processing efficiency and product quality are improved.
Description
Technical field
The present invention relates to a kind of scalable mouth processing mold of pipe fitting, belong to auto parts and components processing technique field.
Background technology
With the fast development of China's automobile industry, engineering construction technology, the quality requirements more and more higher to pipe fitting for the market,
Thus promoting the fast development of pipe fitting processing mold.Existing pipe fitting end processing mould has flaring die and two kinds of reducing die, can
So that pipe fitting end is carried out respectively with expanding and necking processing, but when pipe fitting two ends one end is needed with expanding, one end needs
During necking processing, often need to be processed at twice by flaring die and reducing die, repeated clamping, efficiency is low and affects product essence
Degree.
Content of the invention
The purpose of the present invention is the defect for prior art, provides a kind of pipe fitting scalable mouth processing mold, automatic material taking,
Pipe fitting two ends can be carried out with the processing of one end enlarging, other end necking simultaneously, protect pipe fitting shell portion not to be subject to because of end simultaneously
Processing impacts to cylinder profile, improves working (machining) efficiency and product quality.
The present invention is achieved by the following technical solutions：
A kind of scalable mouth processing mold of pipe fitting, including material fetching mechanism, reducing die, flaring die cover plate, flaring die, pull bar, mold base
With the core print seat that rises, wherein, described material fetching mechanism includes feeding lifting seat, cylinder, first rises core and the first internal expanding mould, and described cylinder sets
It is placed in feeding lifting seat, described cylinder is provided with cylinder rod, described cylinder rod passes through feeding lifting seat to be connected with first core that rises,
Described first core that rises is in the positive multi-pyramid structure stood upside down, and described first internal expanding mould is arranged at first and rises outside core, and inwall and the
One rises the cooperation of outer core gap, and described first internal expanding mould is externally provided with internal expanding die cap plate and internal expanding baffle plate, described internal expanding die cap plate
It is provided with cylinder mounting seat and feeding lifting seat between, between described first internal expanding mould and internal expanding die cap plate, be provided with elastic ring, described
Internal expanding baffle plate is connected with internal expanding die cap plate, and described first internal expanding mould bottom is provided with frustum；
Described reducing die bottom is placed in flaring die cover plate, and described reducing die is in positive multi-pyramid structure, and described reducing die is externally provided with
Tapered sleeve and reducing die cover plate, described tapered sleeve inwall and the cooperation of reducing die outer wall gap, described reducing die cover plate and flaring die cover plate
It is connected, described reducing die top is provided with some reducing die inserts, and described reducing die insert is used cooperatively with the first internal expanding mould, described
It is provided with pipe fitting outer casing in reducing die, in described pipe fitting outer casing, is provided with the second internal expanding mould, in described second internal expanding mould, be provided with
Two rise core, and described second core that rises is in positive multi-pyramid structure, and outer wall is coordinated with the second internal expanding mould inwall gap, described second internal expanding
Mould bottom is provided with boss；
Be provided with back-up ring between described mold base and flaring die cover plate, described flaring die bottom is placed in back-up ring, described flaring die with
It is sequentially provided with some flaring die springs and plug, described flaring die top is provided with groove, described second internal expanding mould between back-up ring
Boss is used with groove fit, is provided with some flaring die inserts, is provided with described flaring die between described flaring die and reducing die
3rd rises core, and the described 3rd core that rises is in positive multiple edge body structure, and inwall is coordinated with flaring die outer wall gap, the described 3rd rise core with
It is provided with position limiting slide block between flaring die；
Described pull bar is connected through second core that rises with the 3rd core that rises, and described pull bar is externally provided with internal expanding mould spring, described internal expanding mould bullet
The spring two ends core that rises with second respectively is connected with the 3rd core that rises, and the described 3rd core bottom of rising passes through back-up ring and mold base and the core print seat phase that rises
Even, described first internal expanding mould, reducing die, the second internal expanding mould, flaring die are formed by some mold sections, and described some mold sections are ringwise
Uniform intervals are distributed.
A kind of scalable mouth processing mold of above-mentioned pipe fitting, wherein, is provided with some subtracting between described pipe fitting outer casing and reducing die
Shake elastomer.
A kind of scalable mouth processing mold of above-mentioned pipe fitting, wherein, described flaring die cover plate both sides external is provided with mould handling ear
Plate, described mould handling otic placode is provided with some otic placode installing holes.
A kind of scalable mouth processing mold of above-mentioned pipe fitting, wherein, described back-up ring both sides are provided with handle.
A kind of scalable mouth processing mold of above-mentioned pipe fitting, wherein, the described 3rd rises core and rise and be provided with adjustment packing ring between core print seat.
A kind of scalable mouth processing mold of above-mentioned pipe fitting, wherein, described mold base bottom is provided with positioning key.
Beneficial effects of the present invention are：
Present invention achieves pipe fitting is carried out with the processing purpose of one end expanding, other end necking simultaneously, it is to avoid pipe fitting end
The pipe fitting repeated clamping that the independent enlarging in portion or necking lead to, improves the operating efficiency of pipe fitting end scalable mouth processing, and by the
Two internal expanding moulds and the elastic compression of pipe fitting outer casing, protect main pipe body part not affected by end processing, improve product matter
Amount；The material fetching mechanism of setting, achievable automatic material taking function, improve production efficiency.
Brief description
Fig. 1 is stereogram of the present invention.
Fig. 2 is cross-sectional view of the present invention.
Fig. 3 is section A portion of the present invention enlarged drawing.
Fig. 4 is section B portion of the present invention enlarged drawing.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
A kind of scalable mouth processing mold of pipe fitting, including material fetching mechanism 1, reducing die 2, flaring die cover plate 3, flaring die 4, pull bar
5th, mold base 6 and the core print seat 7 that rises, wherein, described material fetching mechanism 1 includes feeding lifting seat 8, cylinder 9, first rises in core 10 and first
Rise mould 11, and described cylinder 9 is arranged in feeding lifting seat 8, and described cylinder 9 is provided with cylinder rod 12, and described cylinder rod 12 passes through
Feeding lifting seat 8 is connected with first core 10 that rises, and described first core 10 that rises is in the positive multi-pyramid structure stood upside down, described first internal expanding mould
11 are arranged at first rises outside core 10, and inwall and first rises the cooperation of core 10 outer wall gap；
Described first internal expanding mould 11 is externally provided with internal expanding die cap plate 13 and internal expanding baffle plate 14, described internal expanding die cap plate 13 and feeding liter
It is provided with cylinder mounting seat 15 between fall seat 8, between described first internal expanding mould 11 and internal expanding die cap plate 13, be provided with elastic ring 16, described
Internal expanding baffle plate 14 is connected with internal expanding die cap plate 13, and described first internal expanding mould 11 bottom is provided with frustum 17；
Described reducing die 2 bottom is placed in flaring die cover plate 3, and described reducing die 2 is in positive multi-pyramid structure, outside described reducing die 2
It is provided with tapered sleeve 18 and reducing die cover plate 19, described tapered sleeve 18 inwall is coordinated with reducing die 2 outer wall gap, described reducing die cover plate 19
It is connected with flaring die cover plate 3, described reducing die 2 top is provided with some reducing die inserts 20, described reducing die insert 10 and first
Internal expanding mould 11 uses cooperatively；
It is provided with pipe fitting outer casing 21 in described reducing die 2, between described pipe fitting outer casing 21 and reducing die 2, be provided with some damping bullets
Gonosome 22, is provided with the second internal expanding mould 23 in described pipe fitting outer casing 21, be provided with second and rise core 24 in described second internal expanding mould 23, institute
State second and rise by core 24 in positive multi-pyramid structure, and outer wall and the cooperation of the second internal expanding mould 23 inwall gap, described second internal expanding mould 23
Bottom is provided with boss 25；
It is provided with back-up ring 26, described flaring die cover plate 3 both sides external is provided with mould dress between described mold base 6 and flaring die cover plate 3
Unload otic placode 27, described mould handling otic placode 27 is provided with some otic placode installing holes 28, described back-up ring 26 both sides are provided with handle 29；
Described flaring die 4 bottom is placed in back-up ring 26, is sequentially provided with some flaring die springs between described flaring die 4 and back-up ring 26
30 and plug 31, described flaring die 4 top is provided with groove 32, and the boss 25 of described second internal expanding mould 23 is made with groove 32 cooperation
With, it is provided with some flaring die inserts 33 between described flaring die 4 and reducing die 2, be provided with the 3rd in described flaring die 4 and rise core 34,
Described 3rd core 34 that rises is in positive multiple edge body structure, and inwall and flaring die 4 outer wall gap coordinate, and the described 3rd rises core 34 and enlarging
It is provided with position limiting slide block 35 between mould 4；
Described pull bar 5 is connected through second core 24 that rises with the 3rd core 34 that rises, and described pull bar 5 is externally provided with internal expanding mould spring 42, described
The internal expanding mould spring 42 two ends core 24 that rises with second respectively is connected with the 3rd core 34 that rises, and the described 3rd core 34 bottom of rising passes through back-up ring 26
It is connected with the core print seat 7 that rises with mold base 6, the described 3rd rise core 34 and rising is provided with adjustment packing ring 36, described first internal expanding between core print seat 7
Mould 11, reducing die 2, the second internal expanding mould 23, flaring die 4 are formed by some mold sections 37, and described some mold sections 37 are ringwise uniform
Spaced apart, described mold base 6 bottom is provided with positioning key 38.
The working method of the present invention is：
Specified location is placed this invention into by handle, feeding lifting seat, tapered sleeve and the core print seat that rises are connected with elevating mechanism, mould
Seat and mould handling otic placode are fixed, and positioning key positions, and the convenient adjustment of adjustment packing ring is installed, and realizes the present invention and installs.
When pipe fitting 39 is carried out with scalable mouth processing, first, pipe fitting 39 is positioned over outside the second internal expanding mould, pipe fitting expanding
End 40 is located on flaring die, and now the cylinder on material fetching mechanism pushes down on, and forcing first to rise, core is descending drops to pipe fitting necking
Hold 41 positions, and drive first mould that rises to extend out, control tapered sleeve descending, so that reducing die is tightened up, pipe fitting outer casing elastic fit in
Pipe fitting cylinder body outer wall；；
Subsequently stop tapered sleeve, control the core print seat that rises to rise, drive the 3rd core that rises to move upwards, the 3rd rises by core compression flare mould to extending out
, position limiting slide block is existing spacing, compresses flaring die spring simultaneously, makes second to rise on core and moves, and extruding second mould that rises extends out, and first
The mould that rises fits in pipe fitting inner wall, carries out inside and outside clamping to pipe fitting, and pipe fitting is realized in flaring die and the cooperation extruding of flaring die insert simultaneously
Expansion end includes mouth processing, and last tapered sleeve is descending again, and reducing die rises by mould cooperation extruding in fact to contract, reducing die insert with first
Existing pipe fitting necking end necking processing, and then complete the scalable mouth process operation of pipe fitting.
During feeding, tapered sleeve is up, and reducing die and pipe fitting outer casing extend out therewith, departs from pipe fitting, and the core print seat that simultaneously rises is descending,
The 3rd core that rises is driven to move downward, flaring die shrinks, second core that rises moves downward under the effect of flaring die spring contraction, second
Rise mould and pipe fitting departs from, and because pipe fitting has completed necking operation, second rises mould bottom with material fetching mechanism therefore at pipe fitting necking
Portion's frustum clamping, the lifting of material fetching mechanism therewith, pipe fitting is synchronously removed, and subsequently, the cylinder on material fetching mechanism bounces back upwards, compels
Make first to rise in mould to contract lifting, and then pipe fitting and first mould that rises departs from, and completes blanking.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
All should cover within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection domain of claims
It is defined.
Claims (6)
1. the scalable mouth processing mold of a kind of pipe fitting, including material fetching mechanism, reducing die, flaring die cover plate, flaring die, pull bar, mould
Seat and rise core print seat, it is characterized by, described material fetching mechanism includes feeding lifting seat, cylinder, first rises core and the first internal expanding mould, described
Cylinder is arranged in feeding lifting seat, and described cylinder is provided with cylinder rod, and described cylinder rod rises through feeding lifting seat with first
Core is connected, and described first core that rises is in the positive multi-pyramid structure stood upside down, and described first internal expanding mould is arranged at first and rises outside core, and interior
Wall and first rises the cooperation of outer core gap, and described first internal expanding mould is externally provided with internal expanding die cap plate and internal expanding baffle plate, described internal expanding
It is provided with cylinder mounting seat between die cap plate and feeding lifting seat, between described first internal expanding mould and internal expanding die cap plate, be provided with elasticity
Ring, described internal expanding baffle plate is connected with internal expanding die cap plate, and described first internal expanding mould bottom is provided with frustum；
Described reducing die bottom is placed in flaring die cover plate, and described reducing die is in positive multi-pyramid structure, and described reducing die is externally provided with
Tapered sleeve and reducing die cover plate, described tapered sleeve inwall and the cooperation of reducing die outer wall gap, described reducing die cover plate and flaring die cover plate
It is connected, described reducing die top is provided with some reducing die inserts, and described reducing die insert is used cooperatively with the first internal expanding mould, described
It is provided with pipe fitting outer casing in reducing die, in described pipe fitting outer casing, is provided with the second internal expanding mould, in described second internal expanding mould, be provided with
Two rise core, and described second core that rises is in positive multi-pyramid structure, and outer wall is coordinated with the second internal expanding mould inwall gap, described second internal expanding
Mould bottom is provided with boss；
Be provided with back-up ring between described mold base and flaring die cover plate, described flaring die bottom is placed in back-up ring, described flaring die with
It is sequentially provided with some flaring die springs and plug, described flaring die top is provided with groove, described second internal expanding mould between back-up ring
Boss is used with groove fit, is provided with some flaring die inserts, is provided with described flaring die between described flaring die and reducing die
3rd rises core, and the described 3rd core that rises is in positive multiple edge body structure, and inwall is coordinated with flaring die outer wall gap, the described 3rd rise core with
It is provided with position limiting slide block between flaring die；
Described pull bar is connected through second core that rises with the 3rd core that rises, and described pull bar is externally provided with internal expanding mould spring, described internal expanding mould bullet
The spring two ends core that rises with second respectively is connected with the 3rd core that rises, and the described 3rd core bottom of rising passes through back-up ring and mold base and the core print seat phase that rises
Even, described first internal expanding mould, reducing die, the second internal expanding mould, flaring die are formed by some mold sections, and described some mold sections are ringwise
Uniform intervals are distributed.
2. the scalable mouth processing mold of a kind of pipe fitting as claimed in claim 1, it is characterized by, described pipe fitting outer casing and reducing die
Between be provided with some shock absorbing resilient bodies.
3. the scalable mouth processing mold of a kind of pipe fitting as claimed in claim 1, it is characterized by, described flaring die cover plate both sides external
It is provided with mould handling otic placode, described mould handling otic placode is provided with some otic placode installing holes.
4. the scalable mouth processing mold of a kind of pipe fitting as claimed in claim 1, it is characterized by, described back-up ring both sides are provided with handle.
5. the scalable mouth processing mold of a kind of pipe fitting as claimed in claim 1, it is characterized by, the described 3rd rise by core with rise core print seat it
Between be provided with adjustment packing ring.
6. the scalable mouth processing mold of a kind of pipe fitting as claimed in claim 1, it is characterized by, described mold base bottom is provided with positioning
Key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610360495.8A CN106424395B (en) | 2016-05-28 | 2016-05-28 | A kind of scalable mouth processing mold of pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610360495.8A CN106424395B (en) | 2016-05-28 | 2016-05-28 | A kind of scalable mouth processing mold of pipe fitting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106424395A true CN106424395A (en) | 2017-02-22 |
| CN106424395B CN106424395B (en) | 2018-07-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610360495.8A Active CN106424395B (en) | 2016-05-28 | 2016-05-28 | A kind of scalable mouth processing mold of pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106424395B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838304A (en) * | 2017-11-14 | 2018-03-27 | 高亚贵 | Planetary pipe-expanding device |
| CN108687369A (en) * | 2017-04-06 | 2018-10-23 | 宁波立强机械有限公司 | Swollen location structure and processing technology in one kind |
| CN109732000A (en) * | 2018-12-11 | 2019-05-10 | 首华机电（上海）有限公司 | A kind of sizing die |
| CN110640017A (en) * | 2018-06-27 | 2020-01-03 | 中国石油化工股份有限公司 | Composite material pipe compression molding device and method |
| CN110976678A (en) * | 2019-12-28 | 2020-04-10 | 保隆(安徽)汽车配件有限公司 | Large-angle necking die for beveled thin-wall pipe fitting |
| CN111872239A (en) * | 2020-07-22 | 2020-11-03 | 四川航天长征装备制造有限公司 | Mold for assembling plug and assembling method |
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| JP2587490B2 (en) * | 1989-03-13 | 1997-03-05 | カルソニック株式会社 | Pipe expansion / contraction device |
| JP2009136879A (en) * | 2007-12-03 | 2009-06-25 | Tokyo Roki Co Ltd | Apparatus and method for manufacturing catalyst converter case |
| CN101502862A (en) * | 2009-03-13 | 2009-08-12 | 周海兴 | Method for processing straight-shaped vertical tube of motorcycle |
| CN102658337A (en) * | 2012-04-27 | 2012-09-12 | 江苏国新金属制品有限公司 | Pipe expanding and contracting machine |
| CN203235844U (en) * | 2013-03-21 | 2013-10-16 | 镇江市恒源汽车零部件有限公司 | Pipe end flaring and necking machine |
| CN204638928U (en) * | 2015-04-07 | 2015-09-16 | 新昌县森源精密机械有限公司 | A kind of enlarging reducing all-in-one for refrigeration for refrigerator pipe fitting |
| CN205763439U (en) * | 2016-05-28 | 2016-12-07 | 镇江市恒源汽车零部件有限公司 | A kind of pipe fitting scalable mouth processing mold |
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| JP2587490B2 (en) * | 1989-03-13 | 1997-03-05 | カルソニック株式会社 | Pipe expansion / contraction device |
| JP2009136879A (en) * | 2007-12-03 | 2009-06-25 | Tokyo Roki Co Ltd | Apparatus and method for manufacturing catalyst converter case |
| CN101502862A (en) * | 2009-03-13 | 2009-08-12 | 周海兴 | Method for processing straight-shaped vertical tube of motorcycle |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108687369A (en) * | 2017-04-06 | 2018-10-23 | 宁波立强机械有限公司 | Swollen location structure and processing technology in one kind |
| CN107838304A (en) * | 2017-11-14 | 2018-03-27 | 高亚贵 | Planetary pipe-expanding device |
| CN110640017A (en) * | 2018-06-27 | 2020-01-03 | 中国石油化工股份有限公司 | Composite material pipe compression molding device and method |
| CN109732000A (en) * | 2018-12-11 | 2019-05-10 | 首华机电（上海）有限公司 | A kind of sizing die |
| CN109732000B (en) * | 2018-12-11 | 2021-06-15 | 首华机电（上海）有限公司 | Sizing die |
| CN110976678A (en) * | 2019-12-28 | 2020-04-10 | 保隆(安徽)汽车配件有限公司 | Large-angle necking die for beveled thin-wall pipe fitting |
| CN110976678B (en) * | 2019-12-28 | 2021-07-20 | 保隆(安徽)汽车配件有限公司 | Large-angle necking die for beveled thin-wall pipe fitting |
| CN111872239A (en) * | 2020-07-22 | 2020-11-03 | 四川航天长征装备制造有限公司 | Mold for assembling plug and assembling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106424395B (en) | 2018-07-27 |
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