CN207271983U - Automobile pipe fitting port former - Google Patents
Automobile pipe fitting port former Download PDFInfo
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- CN207271983U CN207271983U CN201720588127.9U CN201720588127U CN207271983U CN 207271983 U CN207271983 U CN 207271983U CN 201720588127 U CN201720588127 U CN 201720588127U CN 207271983 U CN207271983 U CN 207271983U
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- jacking block
- automobile pipe
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Abstract
Automobile pipe fitting port former, its key points of the technical solution are that, including rack, mould bases, molding die and top-pressure mechanism, mould bases is fixedly installed in rack, mould bases is provided with the mould installation cavity for installation forming mould, molding die includes upper and lower corresponding upper die and lower die, drive the lift drive mechanism and core of upper mold elevating movement, core includes bulging block and multi-diameter shaft, the path section diameter of multi-diameter shaft is less than the necking section internal diameter of automobile pipe fitting, the major diameter section diameter of multi-diameter shaft is corresponding with the internal diameter of the pipe fitting body of automobile pipe fitting, bulging block is cylinder, one end of bulging block is fixedly connected with the end face of the major diameter section of core；Top-pressure mechanism includes the top pressure drive component of the fixation jacking block for being relatively arranged on molding die die cavity both ends and movable jacking block and driving movable jacking block to fixed jacking block relative motion.Solving the problems, such as existing automobile pipe fitting, there are inefficiency, cost are higher in pipe end processing and forming.
Description
Technical field
Formation of tubes technical field is the utility model is related to, more particularly to a kind of automobile pipe fitting port former.
Background technology
The pipeline of many interconnections is provided with automobile, for convenience connection and firmness and the sealing of junction
Property, convex ribs, necking of footpath convex etc. are often provided with the port of connecting pin in some pipelines.Such as the high pressure on automobile
Tracheae, as depicted in figs. 1 and 2, including pipe fitting body 1 ', one end of pipe fitting body 1 ' are provided with necking section 2 ', pipe fitting sheet to structure
The linkage section 3 ' that outside diameter is more than pipe fitting body diameter is provided with the middle part of body 1 ', bend pipe connection opening 4 ' is provided with linkage section 3 '
With aperture connector 5 ', the other end of pipe fitting body 1 ' leans at proximal port the connection for being provided with spacing distance and radially outwardly projecting
Convex ribs 6 ', the end connect and annular corresponding with connection convex ribs 6 ' are provided with the corresponding pipe fitting inner wall of convex ribs 6 ' as forming ends
Groove, the convex rib structure on this pipe fitting is to divide multistage manufacturing processes to form by inward turning machine and outward turning machine at present, passes through inward turning machine
The inner wall of machined convex rib structure has seamed edge structure with outward turning, and needs low by multiple process clamping, efficiency
Under, production cost is higher.
Utility model content
The purpose of this utility model aims to solve the problem that existing automobile pipe fitting inefficiency, cost in pipe end processing and forming are higher
The defects of, there is provided one kind is simple in structure, production efficiency is high, lower-cost automobile pipe fitting port former.
The above-mentioned technical purpose of the utility model technical scheme is that：
Automobile pipe fitting port former, including rack, mould bases, molding die and top-pressure mechanism, mould bases are fixedly installed in
In rack, mould bases is provided with the mould installation cavity for installation forming mould, and molding die includes upper and lower corresponding upper mold with
Mould, the lift drive mechanism and core for driving upper mold elevating movement, lower die are fixedly installed in the mould by lower template and pacify
The lower part behaveing affectedly, upper mold are installed on the top of the mould installation cavity by cope plate, and lift drive mechanism is installed on the mould
On frame, cope plate is connected with the lift drive mechanism, is respectively arranged with the opposite face of upper die and lower die corresponding and horizontal
To the upper cavity and lower mode cavity of perforation, the die cavity and automobile pipe fitting of upper cavity and lower mode cavity formation when upper die and lower die pairing
Finished product shape corresponds to, and the core includes bulging block and multi-diameter shaft, and the path section diameter of multi-diameter shaft is less than the necking of automobile pipe fitting
Section internal diameter, the major diameter section diameter of multi-diameter shaft is corresponding with the internal diameter of the pipe fitting body of automobile pipe fitting, and bulging block is cylinder, bulging block
One end be fixedly connected with the end face of the major diameter section of core；The top-pressure mechanism includes being relatively arranged on molding die die cavity two
The fixation jacking block and movable jacking block and driving movable jacking block at end fix top to the top pressure drive component of fixed jacking block relative motion
Block is fixedly mounted by a fixing bracket.
Using the above scheme, core is inserted in automobile pipe fitting to be formed, the path section of core is stretched out vapour to be formed
The necking section of car pipe fitting, bulging block are located in the corresponding inner cavity in formation of tubes end to be formed, then correspond to pipe fitting to be formed and put
Put in the lower mode cavity of lower die, lift drive mechanism driving upper mold moves downward until upper die and lower die pairing is so as to by automobile pipe
Part is pressed in die cavity, and fixed jacking block abuts against molding die one end corresponding with formation of tubes end end, and movable jacking block abuts against
In the end of multi-diameter shaft path section, top pressure drive component, which exerts a force movable jacking block, drives movable jacking block to drive core to fixed jacking block
Movement, when bulging block top to fixation jacking block when and top pressure drive component persistently to movable jacking block and multi-diameter shaft axial force distribution, it is right
Bulging block produces extruding force, and since bulging block is soft materials, i.e. bulging block is radially expanded so as to produce expansive force, to the bulging block
The tube wall of the pipe fitting of corresponding position produces certain extruding force, realizes tube wall radial direction evagination deformation and forms two connection convex ribs.
It is compressed axially, is radially expanded by using the bulging block of soft materials and tube wall evagination is molded into connection convex ribs, process is simple,
Convenient mounting and clamping is quick, and production efficiency is high.
Preferably, the bulging block is polyurethane cylinder, axial projection is provided with one end end face of cylinder,
Groove corresponding with the axial projection is provided with the end face of the multi-diameter shaft major diameter section, when bulging block and multi-diameter shaft are installed
During connection, axial projection close-fitting is plugged in groove correspondence.
Using the above scheme, by the way that axial projection is closely plugged in the groove of ladder shaft end, bulging block and rank are made
Terraced axis firmly installs, pipe fitting end good forming effect.
Preferably, annular protrusion, the rank are radially outward provided with the axial raised side wall of the bulging block
Annular groove corresponding with the annular protrusion is provided with the cell wall of groove in terraced axial end, when bulging block and multi-diameter shaft are pacified
When load connects, annular protrusion inlay card installation corresponding with annular groove.
Using the above scheme, during inlay card corresponding with annular groove by annular protrusion, bulging block is being connected with multi-diameter shaft
Place plays axial limiting, further increases the degree of being connected firmly of bulging block and core.
To be preferred, the mould bases include more root posts and be individually fixed in column both ends and parallel upper mounting plate and
Lower installation board, lower installation board are fixedly installed in the top surface of rack, and lower template is fixedly installed on lower installation board, and upper mounting plate is with
The mould installation cavity for being used for installation forming mould is formed between installing plate.
Using the above scheme, pass through the upper mounting plate of mould bases and the structure design of lower installation board so that molding die into
Stability is good during type, and upper mold has enough stroke spaces, makes feeding convenient.
Preferably, the lift drive mechanism is lifting cylinder, the cylinder body of lifting cylinder is fixedly installed on described
Installing plate, the piston rod of lifting cylinder are set straight down, and the piston rod end of lifting cylinder and the top surface of cope plate connect surely.
Using the above scheme, cope plate and upper mold elevating movement are driven so as to fulfill with by lifting cylinder piston motion
Molding between mould is easy to control with dividing mould.
More vertical guide rods are fixedly installed in the lower template vertically, is provided with the cope plate and is erected with described
To the corresponding slide opening of guide rod, vertical guide rod upper end is threaded onto the slide opening on cope plate.
Using above-mentioned technical proposal, by the setting of vertical guide rod, make cope plate band with upper mold during elevating movement
It is good with guiding role, stability.
Preferably, the top pressure drive component includes top pressure oil cylinder and guidance set, top pressure oil cylinder passes through cylinder bracket
It is fixedly installed in rack, the piston rod of top pressure oil cylinder is divided into top pressure into horizontal setting, the guidance set including parallel
The laterally steering bar of cylinder piston rod both sides and the sliding block being snug fit on laterally steering bar, fixation installs two guide rods respectively
In in the lower template, the movable jacking block is fixedly installed on the side side wall of sliding block, the end of the piston rod of top pressure oil cylinder
Portion is fixedly connected and corresponding with movable jacking block with the opposite side side wall of sliding block.
Using the above scheme, by setting top pressure oil cylinder, it can stablize to movable jacking block and exert a force, the setting of guidance set can
So that stability is good when movable jacking block promotes core.
Preferably, the fixation jacking block is installed on by an adjusting part on the fixing bracket, adjusting part
It is used to install screw rod, two nuts in being provided with through hole on two nuts on screw rod, fixing bracket including screw rod and thread fitting
The support bracket fastened both sides are divided into, the fixation jacking block is fixedly connected on the end of the screw rod.
Using the above scheme, by rotating nuts different product mould is adapted to so as to adjust the position of fixed jacking block
Processing, set two nuts can play the role of axial limiting to screw rod.
In conclusion the utility model has the advantages that：
The utility model drives upper mold elevating movement and driving movable jacking block to promote core to bulging by hydraulic cylinder
Block provides axial force, bulging block is radially expanded deformation, and the tube wall extruding to automobile pipe fitting makes tube wall stretcher strain, so as to fill up
The die cavity of molding die, forms connection convex ribs, and molding mode in this way, makes the inner wall smooth of connection convex ribs, have
Help the circulation of gas, whole process process is simple, and forming stability is good, high in machining efficiency, cost of labor is relatively low.
Brief description of the drawings
Fig. 1 is the structure diagram of existing automobile pipe fitting.
Fig. 2 is the diagrammatic cross-section of existing automobile pipe fitting.
Fig. 3 is the structure diagram of the utility model.
Fig. 4 is the structure diagram of top pressure drive component described in the utility model.
Fig. 5 is the structure diagram of elevating mechanism described in the utility model.
Fig. 6 is the structure diagram of core described in the utility model.
Fig. 7 is the cross-sectional view of bulging block described in the utility model and multi-diameter shaft.
Fig. 8 is schematic diagram when the utility model pipe fitting coordinates in molding die with core.
In figure：1 ', pipe fitting body；2 ', necking section；3 ', linkage section；4 ', bend pipe connection opening；5 ' aperture connectors；6’
Connect convex ribs；
1st, rack；2nd, mould bases；21st, upper mounting plate；22nd, column；23rd, lower installation board；3rd, lift drive mechanism；31st, lift
Oil cylinder；32 vertical guide rods；4th, molding die；41st, upper mold；42nd, lower die；43rd, upper cavity；44th, lower mode cavity；5th, fixing bracket；6、
Adjusting part；61st, screw rod；62nd, nut；7th, fixed jacking block；8th, vertical guide rod；9th, cope plate；10th, top pressure oil cylinder；11st, oil cylinder branch
Frame 12, laterally steering bar；13rd, lower template；15th, sliding block；16th, movable jacking block；17th, multi-diameter shaft；171st, groove；172nd, annular is recessed
Groove；18th, bulging block；181st, axial projection；182nd, annular protrusion.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Automobile pipe fitting port former disclosed in the present embodiment, as shown in figure 3, including rack 1, mould bases 2, molding die
4 and top-pressure mechanism, mould bases 2 be fixedly installed in rack 1, mould bases 2 is provided with mould installation cavity, and molding die 4 is installed on mould
In installation cavity, top-pressure mechanism is arranged at the side of molding die 4.
As shown in Figure 3 and Figure 5, mould bases 2 includes the corresponding upper mounting plate 21 of upper and lower spacing distance, lower installation board 23 and four
Root post 22, lower installation board 23 are fixedly installed in the top of rack 1, and four columns 22 are distributed in the surrounding of lower installation board 23 vertically
And bottom is fixedly connected through lower installation board 23 and with rack 1, upper mounting plate 21 is fixedly installed in the top of four columns 22, mould
Tool installation cavity is arranged between upper mounting plate 21 and lower installation board 23；Molding die 4 includes cope plate 9, lower template 13, upper and lower right
Upper mold 41 and lower die 42, lift drive mechanism 3 and the core answered, lower template 13 are fixedly installed in 23 top surface of lower installation board, under
Mould 42 is fixedly installed in the top of lower template 13, and lift drive mechanism 3 is installed on upper mounting plate 21, and upper mold 41 is fixedly installed in
The bottom of cope plate 9, lift drive mechanism 3 are fixedly connected with the top of cope plate 9, and lift drive mechanism 3 is lifting cylinder 31,
The cylinder body of lifting cylinder 31 is fixedly installed in upper mounting plate 21, and the piston rod of lifting cylinder 31 is disposed through on upper mounting plate 21
The cope plate 9 of the lower section of through hole and upper mounting plate 21 be fixedly connected, the both sides of cope plate 9 are respectively arranged with slide opening, each slide opening
On be coated with a vertical guide rod 32 vertically, the bottom of vertical guide rod 32 is fixedly connected with lower installation board 13, upper mold 41 and lower die 42
Opposite face on be respectively arranged with corresponding and lateral direction penetrating upper cavity 43 and lower mode cavity 44, when upper mold 41 and lower die 42 are right
The die cavity that upper cavity 43 and lower mode cavity 44 are formed during conjunction is corresponding with the finished product shape of automobile pipe fitting.
As shown in fig. 6, core includes bulging block 18 and multi-diameter shaft 17, the path section diameter of multi-diameter shaft 17 is less than automobile pipe fitting
Necking section internal diameter, the major diameter section diameter of multi-diameter shaft 17 is corresponding with the internal diameter of the pipe fitting body of automobile pipe fitting, bulging block 18 for circle
Cylinder, one end of bulging block 18 are fixedly connected with the end face of the major diameter section of multi-diameter shaft 17, and bulging block 18 is polyurethane cylinder, circle
Axial projection 181 is provided with one end end face of cylinder, it is right with axial projection 181 to be provided with the end face of 17 major diameter section of multi-diameter shaft
The groove 171 answered, is radially outward provided with annular protrusion 182,17 end of multi-diameter shaft on the side wall of the axial projection 181 of bulging block 18
Annular groove 172 corresponding with annular protrusion 182 is provided with the cell wall of groove 171 on face, when bulging block 18 and multi-diameter shaft
During 17 installation connection, annular protrusion 182 is corresponded to and is plugged in groove 171, annular protrusion 182 and 172 corresponding inlay card of annular groove
Installation.
As shown in Figure 3 and Figure 4, top-pressure mechanism includes the fixation jacking block 7 and movable top for being relatively arranged on 4 both ends of molding die
Block 15 and top pressure drive component 10, fixed jacking block 7 are installed in rack 1 by a fixing bracket 5, movable jacking block 15 and top pressure
Drive component 10 connects, and drives movable jacking block 15 logical to 7 relative motion of fixed jacking block, fixed jacking block 7 from top pressure drive component 10
Cross an adjusting part 6 to be installed on fixing bracket 5, adjusting part 6 includes screw rod 61 and thread fitting in two on screw rod 61
Nut 62, through hole is provided with fixing bracket 5 and is used to install screw rod 61, and two nuts 62 are divided into the both sides of fixing bracket 5, Gu
Determine the end that jacking block 7 is fixedly connected on screw rod 61.
As shown in Figure 3 and Figure 4, top pressure drive component includes top pressure oil cylinder 10 and guidance set, and top pressure oil cylinder 10 passes through oil
Jar support 11 is fixedly installed in rack 1, and the piston rod of top pressure oil cylinder 10 includes parallel be divided into horizontal setting, guidance set
The laterally steering bar 12 of top pressure cylinder piston rod both sides and the sliding block 15 being snug fit on laterally steering bar 12, two laterally steerings
Fixation is threaded onto in lower template 13 bar 12 respectively, and movable jacking block 16 is fixedly installed on the side side wall of sliding block 15, top pressure oil cylinder
The end of 10 piston rod is fixedly connected with the opposite side side wall of sliding block 15, and movable jacking block 16 is a push rod, one end of push rod
Corresponding with the small end of multi-diameter shaft 17, the other end is fixedly connected with sliding block 15.
When the utility model is used, as shown in Fig. 3, Fig. 5 and Fig. 8, core is inserted in automobile pipe fitting to be formed, makes rank
The path section of terraced axis 17 stretches out the necking section of automobile pipe fitting to be formed, and it is corresponding interior that bulging block 18 is located at formation of tubes end to be formed
In chamber, then pipe fitting to be formed is correspondingly placed into the lower mode cavity of lower die 42, lift drive mechanism driving upper mold 41 is transported downwards
Move until upper mold 41 and 42 pairing of lower die are so as to which automobile pipe fitting to be filled in die cavity and compress, fixed jacking block 7 abuts against shaping
Mould one end corresponding with formation of tubes end end, movable jacking block 16 abut against the end of 17 path section of multi-diameter shaft, top pressure driving
Component, which exerts a force movable jacking block 16, drives movable jacking block 16 to drive core to be moved to fixed jacking block 7, when the top of bulging block 18 to fixation
During jacking block 7 and top pressure drive component produces extruding persistently to 17 axial force distribution of movable jacking block 16 and multi-diameter shaft to bulging block 18
Power, since bulging block 18 is polyurethane soft materials, i.e. bulging block 18 is radially expanded so as to produce expansive force, right to the bulging block 18
The tube wall for the pipe fitting that should locate produces certain extruding force, realizes tube wall radial direction evagination deformation and forms two connection convex ribs, real
Show and tube wall radial direction evagination is formed into two connection convex ribs.Whole equipment is simple in structure, is easy to control, and produces compared with prior art
It is efficient.
This specific embodiment is only explanation to the utility model, it is not the limitation to the utility model, ability
Field technique personnel as needed can make the present embodiment the modification of no creative contribution after this specification is read, but
As long as all protected in the right of the utility model be subject to Patent Law.
Claims (8)
1. automobile pipe fitting port former, it is characterised in that：Including rack（1）, mould bases（2）, molding die（4）And high pressure apparatus
Structure, mould bases（2）It is fixedly installed in rack（1）On, mould bases（2）It is provided with and is used for installation forming mould（4）Mould installation cavity, into
Pattern has（4）Including upper and lower corresponding upper mold（41）And lower die（42）, driving upper mold（41）The lift drive mechanism of elevating movement
（3）And core, lower die（42）Pass through lower template（13）It is fixedly installed in the lower part of the mould installation cavity, upper mold（41）Pass through
Cope plate（9）It is installed on the top of the mould installation cavity, lift drive mechanism（3）It is installed on the mould bases（2）On, cope plate
（9）With the lift drive mechanism（3）Connection, upper mold（41）And lower die（42）Opposite face on be respectively arranged with it is corresponding and
The upper cavity of lateral direction penetrating（43）And lower mode cavity（44）, work as upper mold（41）And lower die（42）Upper cavity during pairing（43）And lower mode cavity
（44）The die cavity of formation is corresponding with the finished product shape of automobile pipe fitting, and the core includes bulging block（18）And multi-diameter shaft（17）, rank
Terraced axis（17）Path section diameter be less than automobile pipe fitting necking section internal diameter, multi-diameter shaft（17）Major diameter section diameter and automobile pipe fitting
Pipe fitting body internal diameter correspond to, bulging block（18）For cylinder, bulging block（18）One end and core major diameter section end face
It is fixedly connected；The top-pressure mechanism includes the fixation jacking block for being relatively arranged on molding die die cavity both ends（7）And movable jacking block
（16）And driving movable jacking block（16）To fixed jacking block（7）The top pressure drive component of relative motion, fixed jacking block（7）Pass through one
Fixing bracket（5）It is fixedly mounted.
2. automobile pipe fitting port according to claim 1 former, it is characterised in that：The bulging block（18）It is poly-
Urethane cylinder, is provided with axial projection on one end end face of cylinder（181）, the multi-diameter shaft（17）The end face of major diameter section
On be provided with and the axial projection（181）Corresponding groove（171）, when bulging block（18）With multi-diameter shaft（17）Installation connection
When, axial projection（181）Close-fitting is plugged in groove（171）It is corresponding.
3. automobile pipe fitting port according to claim 2 former, it is characterised in that：The bulging block（18）Axis
To protrusion（181）Side wall on be radially outward provided with annular protrusion（182）, the multi-diameter shaft（17）Groove on end face
（171）Cell wall on be provided with and the annular protrusion（182）Corresponding annular groove（172）, when bulging block（18）With ladder
Axis（17）During installation connection, annular protrusion（182）With annular groove（172）Corresponding inlay card installation.
4. the automobile pipe fitting port former according to claim 1,2 or 3, it is characterised in that：The mould bases（2）Bag
Include more root posts（22）Be individually fixed in column（22）Both ends and parallel upper mounting plate（21）And lower installation board（23）, under
Installing plate（23）It is fixedly installed in rack（1）Top surface, lower template（13）It is fixedly installed in lower installation board（23）On, upper mounting plate
（21）And lower installation board（23）Between formed described in be used for installation forming mould（4）Mould installation cavity.
5. automobile pipe fitting port according to claim 4 former, it is characterised in that：The lift drive mechanism
（3）For lifting cylinder 31, the cylinder body of lifting cylinder 31 is fixedly installed in the upper mounting plate（21）, the piston rod of lifting cylinder 31
Set straight down, the piston rod end of lifting cylinder 31 and cope plate（9）Top surface connect surely.
6. automobile pipe fitting port according to claim 5 former, it is characterised in that：The lower template（13）It is upper perpendicular
Directly it is fixedly installed more vertical guide rods（32）, the cope plate（9）On be provided with and the vertical guide rod（32）It is corresponding
Slide opening, vertical guide rod（32）Upper end is threaded onto cope plate（9）On slide opening.
7. automobile pipe fitting port according to claim 6 former, it is characterised in that：The top pressure drive component includes
Top pressure oil cylinder（10）And guidance set, top pressure oil cylinder（10）Pass through cylinder bracket（11）It is fixedly installed in rack（1）On, top pressure oil
Cylinder（10）Piston rod into horizontal setting, the guidance set includes parallel being divided into top pressure oil cylinder（10）Piston rod both sides
Laterally steering bar（12）Be snug fit at laterally steering bar（12）On sliding block 15, two laterally steering bars（12）Fixation is worn respectively
Loaded on the lower template（13）On, the movable jacking block（16）It is fixedly installed on the side side wall of sliding block 15, top pressure oil cylinder
（10）The end of piston rod be fixedly connected with the opposite side side wall of sliding block 15 and and movable jacking block（16）It is corresponding.
8. the automobile pipe fitting port former according to claim 1 or 7, it is characterised in that：The fixation jacking block（7）
The fixing bracket is installed on by an adjusting part（5）On, adjusting part includes screw rod（61）And thread fitting is in spiral shell
Bar（61）On two nuts（62）, fixing bracket（5）On be provided with through hole be used for install screw rod（61）, two nuts（62）Set up separately
In the fixing bracket（5）Both sides, the fixation jacking block（7）It is fixedly connected on the screw rod（61）End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588127.9U CN207271983U (en) | 2017-05-24 | 2017-05-24 | Automobile pipe fitting port former |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720588127.9U CN207271983U (en) | 2017-05-24 | 2017-05-24 | Automobile pipe fitting port former |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207271983U true CN207271983U (en) | 2018-04-27 |
Family
ID=61992430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720588127.9U Active CN207271983U (en) | 2017-05-24 | 2017-05-24 | Automobile pipe fitting port former |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207271983U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955940A (en) * | 2017-05-24 | 2017-07-18 | 宁波嘉天汽车管件有限公司 | Automobile pipe fitting port former and its port forming method |
| CN109108172A (en) * | 2018-10-23 | 2019-01-01 | 嘉兴新维液压缸有限公司 | A kind of expanding device |
-
2017
- 2017-05-24 CN CN201720588127.9U patent/CN207271983U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955940A (en) * | 2017-05-24 | 2017-07-18 | 宁波嘉天汽车管件有限公司 | Automobile pipe fitting port former and its port forming method |
| CN109108172A (en) * | 2018-10-23 | 2019-01-01 | 嘉兴新维液压缸有限公司 | A kind of expanding device |
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