CN208543072U - Friction Stir Welding device applied to numerically-controlled machine tool - Google Patents
Friction Stir Welding device applied to numerically-controlled machine tool Download PDFInfo
- Publication number
- CN208543072U CN208543072U CN201820849406.0U CN201820849406U CN208543072U CN 208543072 U CN208543072 U CN 208543072U CN 201820849406 U CN201820849406 U CN 201820849406U CN 208543072 U CN208543072 U CN 208543072U
- Authority
- CN
- China
- Prior art keywords
- module
- welding
- machine tool
- numerically
- vacuum fixture
- 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.)
- Active
Links
Landscapes
- Arc Welding Control (AREA)
Abstract
The utility model relates to a kind of Friction Stir Welding devices applied to numerically-controlled machine tool, belong to metal welding techniques field.Locating module is mounted on clamp module plays positioning, clamping action with clamp module jointly；Welding module is installed on main shaft of numerical control machine tool to realize rotation and linear motion, and drive module drives clamp module movement；Direct current loading module is located in welding module, and magnetic field loading module is installed in welding module and clamp module, the final welding for realizing weldment.Advantage is: structure novel, simply, versatile, is swift in response.It can weld the thin plate of different sizes and thickness size；Cooperation numerically-controlled machine tool can weld weld seam of different shapes, and meet in welding process, and welding direction and horizontal plane are always at 2 ° of inclination angles, to meet the sufficient mobility of weld material.The load of short distance larger current and magnetic field load may be implemented, so that Weld Performance is more excellent.
Description
Technical field
The utility model relates to metal welding techniques field, in particular to a kind of agitating friction applied to numerically-controlled machine tool welds
Connection device.The utility model can weld the thin plate of different sizes and thickness size；Cooperation numerically-controlled machine tool can weld of different shapes
Weld seam, and meet in welding process, welding direction and horizontal plane are adequately flowed always at 2 ° of inclination angles with meeting weld material
Property；The load of short distance larger current and magnetic field load may be implemented in the utility model, so that Weld Performance is more excellent.
Background technique
Since 1991 Britain's institute of welding invent it is a kind of for aluminium alloy exploitation advanced solid phase joining technique-stir
Since mixing friction welding (FW), because it is compared with traditional welding, have the characteristics that high-efficient, less energy-consuming, deformation is small, pollution-free, by wide
General concern.It is higher to the performance requirement of stirring-head but due to some materials with high melting point intensity with higher and hardness,
There are still residual stress, hole defect, the poor problems of weldability for welding point simultaneously.
In stirring friction-welding technique, heat needed for heating metal is mainly derived from table on the stirring-head shaft shoulder and weldment
Friction between face, temperature needed for single heating means are extremely difficult to refractory metal plastic deformation, the requirement to lathe
Also it relatively heightens.Therefore, Aided Physical field is introduced in the metal material especially weldering of materials with high melting point agitating friction, not only favorably
In appearance of weld, and soldering set abrasion can be reduced, improve soldering set service life.
In existing Friction Stir Welding device, small-sized friction stir weld device presence can only weld single shape or rule
The shortcomings that setting shape weldment, and existing small-sized Friction Stir Welding device is difficult to meet the weldering while weld seam of function admirable
Connect requirement of different shapes.
Summary of the invention
The purpose of this utility model is to provide a kind of Friction Stir Welding device applied to numerically-controlled machine tool, solve existing
There is the above problem existing for technology.The utility model can weld the thin plate of different sizes and thickness size；Cooperate CNC milling machine can
Weld seam of different shapes is welded, and is met in welding process, welding direction and 2 ° of inclination angles of horizontal plane are filled with meeting weld material
The mobility divided；The load of short distance high current and magnetic field load may be implemented in the present apparatus, so that Weld Performance is more excellent.This
Utility model structure novel, it is simply, versatile, it is swift in response, time and expense can be saved, realize mass production.It can
Carry out material properties test abundant.
The above-mentioned purpose of the utility model is achieved through the following technical solutions:
Applied to the Friction Stir Welding device of numerically-controlled machine tool, including welding module, clamp module, locating module,
Drive module, direct current loading module and magnetic field loading module.This device characteristic is: locating module is installed on clamp module
Play the role of positioning, clamping jointly with clamp module；Welding module is installed on numerically-controlled machine tool, by main shaft of numerical control machine tool
Rotation and linear motion are realized in driving, while drive module driving clamp module realizes that vacuum fixture welding bench 19 has 2 ° always
The rotary motion of tilt angle, the two ensure that the abundant mobility under weld seam arbitrary shape；Direct current loading module is located at weldering
It connects on operational module, magnetic field loading module is installed in welding module and clamp module, the final welding for realizing weldment.
The welding module is: shaft shoulder body 34 has circular radiating slot 35, and annular fixture block 29 is minimum by shaft shoulder body
Internal diameter is positioned, while being fixed by threaded hole；The annular cooperation of fixture block 29 stirring needle body protrusion fixture block 27 constitutes difference
The stirring body of mixing needle height, so as to weldment of the throat thickness between 2mm-5mm；The direction of rotation of stirring body and annular fixture block
29 protrusion directions are consistent；Stirring body internal structure is locked by clamping screw 25；28 top of insulator is fixed by screws in
On milling machine, lower end is cooperated by screw thread and annular cooling body 33, and 31 external screw thread of connector is connect with 28 screw-internal thread fit of insulator,
Connector 31 is connect with shaft shoulder body 34 by bearing II 30.
The clamp module is: vacuum fixture welding bench 19 is connect by pin 9 with vacuum fixture fixed station 18, by
Air flow guide groove 21 and airflow hole I, II 15,20 form, and gas passes in and out vacuum fixture welding bench 19 by airflow hole I, II 15,20
The cavity formed between vacuum fixture fixed station 18；Vacuum fixture fixed station 18 passes through lateral 16 positioning vacuum fixture of slideway
Welding bench 19, vacuum fixture welding bench 19 are completely embedded by screw with vacuum fixture fixed station 18.
The drive module is: servo motor 3 passes through worm gear I, II 7,24, I, II 5,23 deceleration torque increase of worm screw drive folder
Tight module is rotated, wherein servo motor 3 is connect with motor flange 4, is bolted on rotary support table 10
On.Worm gear I 7 and worm screw II 23 are connected on same axis 6, and axis 6 is positioned at the bearing hole of rotary support table 10 by bearing I 8
In 11；Lubrication groove 13, ring-shaped guide rail 14 and locating slot 12 are provided on rotary support table 10, annular slide 22 is by screw and very
Empty fixture fixed station 18 connects, and annular slide 22 drives clamp module to make rotating motion along ring-shaped guide rail；10 band of rotary support table
There are 2 ° of inclination angles, the vacuum fixture welding bench 19 rotated with welding process fully ensures that always with horizontal plane at 2 ° of inclination angles
The mobility of weld material enhances the performance of weld seam.
The locating module is locating piece 2, and attachment screw is locked on vacuum fixture welding bench 19, porous knot thereon
Structure is for welding various sizes of weldment.
The direct current loading module includes DC electrode hole 1 and conductive briquetting 32, and the DC electrode is installed on directly
It flows in electrode hole 1 and applies electric current for device, conductive briquetting 32 is connect by being threadedly engaged with annular cooling body 33, by changing spiral shell
Line tightens degree to adjust the compression degree of conductive briquetting 32；Annular cooling body 33 is insulator 28, connector 31 and conductive pressure
Block 32 cools down, to prevent its failure.Conductive briquetting 32 reduces the distance for being applied to electric current on weldment, so that the electricity between weld seam
Current density enhancing.
The magnetic field loading module includes the annular permanent magnet 37 being fixed on stirring needle body 36 and is fixed on vacuum clip
Has the rectangular permanent magnet composition in fixed station groove 17, the elasticity gear magnetic sheet 26 being installed on shaft shoulder body 34 prevents magnetic field for number
The influence for controlling milling machine, guarantees the normal work of CNC milling machine.
The utility model has the beneficial effects that: it is structure novel, simple, it is versatile, it is swift in response, the time can be saved
And expense, realize mass production.It can weld the thin plate of different sizes and thickness size；Cooperate the solderable not similar shape of CNC milling machine
The weld seam of shape, and meet in welding process, welding direction and 2 ° of inclination angles of horizontal plane are adequately flowed with meeting weld material
Property.The load of short distance high current and magnetic field load may be implemented, so that Weld Performance is more excellent.It is practical.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The illustrative example and its explanation of the utility model do not constitute the improper limit to the utility model for explaining the utility model
It is fixed.
Fig. 1 is the overall structure surface structure schematic diagram of the utility model；
Fig. 2 is the surface structure schematic diagram of the rotary support table of the utility model；
Fig. 3 is the vacuum fixture fixed station surface structure schematic diagram of the utility model；
Fig. 4 is the vacuum fixture welding bench surface structure schematic diagram of the utility model；
Fig. 5 is the drive module part attachment structure schematic diagram of the utility model；
Fig. 6 is the stirring body surface structure schematic diagram of the utility model；
Fig. 7 is the mixing needle body surface structure schematic diagram of the utility model；
Fig. 8 is the conducting block surface structure schematic diagram of the utility model；
Fig. 9 is the welding module cross-sectional view of the utility model.
In figure: 1, DC electrode hole；2, locating piece；3, servo motor；4, motor flange；5, worm screw I；6, worm gear shaft；7,
Worm gear I；8, bearing I；9, pin；10, rotary support table；11, bearing hole；12, locating slot；13, lubrication groove；14, ring-shaped guide rail；
15, airflow hole I；16, slideway；17, vacuum fixture fixed station groove；18, vacuum fixture fixed station；19, vacuum fixture welding bench；
20, airflow hole II；21, air flow guide groove；22, annular slide；23, worm screw II；24, worm gear II；25, clamping screw；26, elastic
Keep off magnetic sheet；27, needle body protrusion fixture block is stirred；28, insulator；29, annular fixture block；30, bearing II；31, connector；32, conductive
Briquetting；33, annular cooling body；34, shaft shoulder body；35, radiating groove；36, needle body is stirred；37, annular permanent magnet.
Specific embodiment
The detailed content and its specific embodiment of the utility model are further illustrated with reference to the accompanying drawing.
Referring to shown in Fig. 1 to Fig. 9, the electromagnetism applied to numerically-controlled machine tool of the utility model assists agitating friction device, packet
Include welding module, clamp module, locating module, drive module, direct current loading module and magnetic field loading module, this device
Be characterized in that: locating module is installed on clamp module plays the role of positioning, clamping with clamp module jointly；Welding mould
Block is installed on numerically-controlled machine tool, is driven by main shaft of numerical control machine tool and is realized rotation and linear motion, while drive module driving clamps
Module realizes that vacuum fixture welding bench 19 has the rotary motion of 2 ° of tilt angles always, and the two ensure that under weld seam arbitrary shape
Abundant mobility；Direct current loading module is located in welding module, and magnetic field loading module is installed on welding module
In clamp module, the final welding for realizing weldment.
The welding module includes stirring needle body 36, shaft shoulder body 34, insulator 28, annular cooling body 33, connector
31 have circular radiating slot 35, bring for dissipating annular permanent magnet 37 in time to shaft shoulder body with annular fixture block 29, shaft shoulder body 34
Waste heat, prevent shaft shoulder body 34 fail.Annular fixture block 29 is positioned by shaft shoulder body minimum diameter, while passing through screw thread
Hole is fixed；The annular cooperation of fixture block 29 stirring needle body protrusion fixture block 27 constitutes the stirring body of different mixing needle height, to weld
Connect weldment of the thickness between 2mm-5mm；The direction of rotation of stirring body is consistent with annular 29 protrusion direction of fixture block；Pass through locking screw
Bolt 25 locks stirring body internal structure；Wrapped with insulation is clamped at the top of shaft shoulder body by fraise jig simultaneously and carries out work
Make.28 top of insulator is fixed by screws on milling machine, and lower end is cooperated by screw thread and annular cooling body 33, annular cooling body
33 to cool down to direct current loading module.31 external screw thread of connector is connect with 28 screw-internal thread fit of insulator, connector
31 are connect with shaft shoulder body 34 by bearing II 30.
The clamp module includes vacuum fixture welding bench 19, vacuum fixture fixed station 18, elevated-temperature seal item, vacuum clip
Tool welding bench 19 is connect by pin 9 with vacuum fixture fixed station 18, by air flow guide groove 21 and I, II 15,20 group of airflow hole
At gas passes in and out the sky formed between vacuum fixture welding bench 19 and vacuum fixture fixed station 18 by airflow hole I, II 15,20
Chamber；Vacuum fixture welding bench 19 increases the contact area of weldment and workbench while guaranteeing that gas sufficiently flows, with
Increase clamp body to the clamping force of weldment.Vacuum fixture fixed station 18 passes through lateral 16 positioning vacuum fixture welding bench of slideway
19, while to be replaced in time when vacuum fixture welding bench 19 fails.Vacuum fixture welding bench 19 passes through screw and vacuum clip
Tool fixed station 18 is completely embedded, and prevents gas from leaking.
The drive module includes servo motor 3, worm gear I, II 7,24, worm screw I, II 5,23, rotary support table 10, electricity
Machine flange 4 and annular slide 22, servo motor 3 pass through worm gear I, II 7,24, I, II 5,23 deceleration torque increase of worm screw drive clamping die
Block is rotated, wherein servo motor 3 is connect with motor flange 4, is bolted on rotary support table 10.Snail
It takes turns I 7 to be connected on same axis 6 with worm screw II 23, axis 6 is positioned in the bearing hole 11 of rotary support table 10 by bearing I 8；
Lubrication groove 13, ring-shaped guide rail 14 and locating slot 12 are provided on rotary support table 10, annular slide 22 passes through screw and vacuum clip
Have fixed station 18 to connect, annular slide 22 drives clamp module to make rotating motion along ring-shaped guide rail；Rotary support table 10 has 2 °
Inclination angle, the vacuum fixture welding bench 19 rotated with welding process have fully ensured that weld seam always with horizontal plane at 2 ° of inclination angles
The mobility of material enhances the performance of weld seam.
The locating module is locating piece 2, and attachment screw is locked on vacuum fixture welding bench 19, porous knot thereon
Structure is for welding various sizes of weldment.
The direct current loading module includes DC electrode hole 1 and conductive briquetting 32, and the DC electrode is installed on directly
It flows in electrode hole 1 and applies electric current for device, conductive briquetting 32 is connect by being threadedly engaged with annular cooling body 33, by changing spiral shell
Line tightens degree to adjust the compression degree of conductive briquetting 32；Annular cooling body 33 is insulator 28, connector 31 and conductive pressure
Block 32 cools down, to prevent its failure.Conductive briquetting 32 reduces the distance for being applied to electric current on weldment, so that the electricity between weld seam
Current density enhancing.
The magnetic field loading module includes the annular permanent magnet 37 being fixed on stirring needle body 36 and is fixed on vacuum clip
Has the rectangular permanent magnet composition in fixed station groove 17, the elasticity gear magnetic sheet 26 being installed on shaft shoulder body 34 prevents magnetic field for number
The influence for controlling milling machine, guarantees the normal work of CNC milling machine.
Referring to shown in Fig. 1 to Fig. 9, test specimen is placed on vacuum fixture welding bench 19, by adjusting consolidating for 2 bolt of locating piece
Positioning is set to be adjusted to the position of weldment；Next the air flow guide groove 21 not covered is sealed with sealing strip, and led to
It crosses airflow hole I and vacuumize process is carried out to the space between vacuum fixture welding bench 19 and vacuum fixture fixed station 18, to reach
The purpose that weldment is clamped in advance.It is driven by servo motor 3, two pairs of worm gears I, II 7,24, I, II 5,23 deceleration torque increase of worm screw, from
And the rotary support table 10 with 2 ° of tilt angles is driven to make rotating motion, in combination with the weldering being installed on main shaft of numerical control machine tool
X-axis, Y-axis and the Z axis movement of operational module are connect, welds not similar shape while guarantee weld material abundant mobility to realize
The weld seam of shape.
The foregoing is merely the preferred embodiments of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all to made by the utility model it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of Friction Stir Welding device applied to numerically-controlled machine tool, it is characterised in that: including welding module, clamping die
Block, locating module, drive module, direct current loading module and magnetic field loading module, it is characterised in that: locating module is mounted on folder
Play the role of positioning, clamping jointly with clamp module in tight module；Welding module is installed on numerically-controlled machine tool, by numerical control
Rotation and linear motion are realized in machine tool chief axis driving, while drive module driving clamp module realizes vacuum fixture welding bench (19)
Always the rotary motion of 2 ° of tilt angles is had, the two ensure that the abundant mobility under weld seam arbitrary shape；Direct current load
Module is located in welding module, and magnetic field loading module is installed in welding module and clamp module, final to realize weldering
The welding of part；The welding module is: shaft shoulder body (34) has circular radiating slot (35), and annular fixture block (29) passes through the shaft shoulder
Body minimum diameter is positioned, while being fixed by threaded hole；Annular fixture block (29) cooperation stirring needle body protrusion fixture block
(27) stirring body of different mixing needle height is constituted, so as to weldment of the throat thickness between 2mm-5mm；The rotation side of stirring body
To consistent with annular fixture block (29) protrusion direction；Stirring body internal structure is locked by clamping screw (25)；Insulator (28)
Top is fixed by screws on milling machine, and lower end is cooperated by screw thread and annular cooling body (33), connector (31) external screw thread with
The connection of insulator (28) screw-internal thread fit, connector (31) are connect with shaft shoulder body (34) by bearing II (30).
2. the Friction Stir Welding device according to claim 1 applied to numerically-controlled machine tool, it is characterised in that: the folder
Tight module is: vacuum fixture welding bench (19) is connect by pin (9) with vacuum fixture fixed station (18), by air flow guide groove
(21) with airflow hole I, II (15,20) form, gas by airflow hole I, II (15,20) disengaging vacuum fixture welding bench (19) with
The cavity formed between vacuum fixture fixed station (18)；Vacuum fixture fixed station (18) passes through lateral slideway (16) positioning vacuum
Fixture welding bench (19), vacuum fixture welding bench (19) are completely embedded by screw with vacuum fixture fixed station (18).
3. the Friction Stir Welding device according to claim 1 applied to numerically-controlled machine tool, it is characterised in that: the drive
Dynamic model block is: servo motor (3) drives clamp module to carry out by worm gear I, II (7,24), (5,23) the deceleration torque increase of worm screw I, II
Rotary motion, wherein servo motor (3) is connect with motor flange (4), is bolted on rotary support table (10)；Snail
I (7) of wheel and worm screw II (23) are connected on same axis (6), and axis (6) is positioned at rotary support table (10) by bearing I (8)
In bearing hole (11)；Lubrication groove (13), ring-shaped guide rail (14) and locating slot (12) are provided on rotary support table (10), annular is sliding
Seat (22) is connect by screw with vacuum fixture fixed station (18), and annular slide (22) drive clamp module is done along ring-shaped guide rail to be revolved
Transhipment is dynamic；Rotary support table (10) have 2 ° of inclination angles, the vacuum fixture welding bench (19) rotated with welding process always with
Horizontal plane has fully ensured that the mobility of weld material at 2 ° of inclination angles, enhances the performance of weld seam.
4. the Friction Stir Welding device according to claim 1 applied to numerically-controlled machine tool, it is characterised in that: described determines
Position module is locating piece (2), and attachment screw is locked on vacuum fixture welding bench (19), and porous structure thereon is for welding not
With the weldment of size.
5. the Friction Stir Welding device according to claim 1 applied to numerically-controlled machine tool, it is characterised in that: described is straight
Galvanic electricity loading module includes DC electrode hole (1) and conductive briquetting (32), and the DC electrode, which is installed on, is located at annular cooling body
(33) apply electric current in the DC electrode hole (1) on for device, conductive briquetting (32) is by being threadedly engaged and annular cooling body
(33) it connects, degree is tightened by change screw thread to adjust the compression degree of conductive briquetting (32)；Annular cooling body (33) is exhausted
Edge body (28), connector (31) and conductive briquetting (32) cool down；Conductive briquetting (32) reduce be applied to electric current on weldment away from
From so that the current density between weld seam enhances.
6. the Friction Stir Welding device according to claim 1 applied to numerically-controlled machine tool, it is characterised in that: the magnetic
Field loading module includes the annular permanent magnet (37) being fixed in stirring needle body (36) and is fixed on vacuum fixture fixed station groove
(17) the rectangular permanent magnet composition in, elasticity gear magnetic sheet (26) being installed on shaft shoulder body (34) prevent magnetic field for CNC milling machine
Influence, guarantee the normal work of CNC milling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820849406.0U CN208543072U (en) | 2018-06-04 | 2018-06-04 | Friction Stir Welding device applied to numerically-controlled machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820849406.0U CN208543072U (en) | 2018-06-04 | 2018-06-04 | Friction Stir Welding device applied to numerically-controlled machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208543072U true CN208543072U (en) | 2019-02-26 |
Family
ID=65420789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820849406.0U Active CN208543072U (en) | 2018-06-04 | 2018-06-04 | Friction Stir Welding device applied to numerically-controlled machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208543072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555434A (en) * | 2018-06-04 | 2018-09-21 | 吉林大学 | Agitating friction welder applied to numerically-controlled machine tool |
-
2018
- 2018-06-04 CN CN201820849406.0U patent/CN208543072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108555434A (en) * | 2018-06-04 | 2018-09-21 | 吉林大学 | Agitating friction welder applied to numerically-controlled machine tool |
| CN108555434B (en) * | 2018-06-04 | 2024-03-22 | 吉林大学 | Friction stir welding device applied to numerical control machine tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108555434A (en) | Agitating friction welder applied to numerically-controlled machine tool | |
| CN201511218U (en) | Device used for welding valves | |
| CN110802317A (en) | Static shaft shoulder wire filling friction stir welding machine head system | |
| CN206153769U (en) | Flange changer pressure sensing part laser welding tool | |
| CN208788028U (en) | A kind of localization tool in hydraulic cylinder end cover moulding process | |
| CN208543072U (en) | Friction Stir Welding device applied to numerically-controlled machine tool | |
| CN204639394U (en) | Welding rotation platform | |
| CN202894585U (en) | Vacuum electron beam welding fixture for cooling water channel of vacuum reaction cavity of integrate circuit (IC) equipment | |
| CN202199874U (en) | Precision numerical control indexing rotating shaft for electric discharge machining | |
| CN214109280U (en) | Rotary platform assembly welding device | |
| CN204449725U (en) | A kind of double slit automatic welder(welding machine) | |
| CN205571743U (en) | Power battery's laser welding anchor clamps and laser welding equipment | |
| CN105458640B (en) | A kind of aluminium alloy radiating fin of transformer clamp system and technological process | |
| CN103317215B (en) | Heat pipe sealing argon arc welding device and method | |
| CN205996592U (en) | A kind of vertical process center fixture | |
| CN216028917U (en) | Welding positioning fixture | |
| CN209363991U (en) | A kind of three axis positioner of level | |
| CN209738300U (en) | High-efficient filter core of carousel formula melts machine soon | |
| CN209380053U (en) | Assembly of hydraulic torque converter welding equipment | |
| CN103785938B (en) | A kind of IC equips vacuum reaction chamber cooling water channel vacuum electron beam welding fixture | |
| CN207344018U (en) | A kind of precisely efficient pipe fitting welding equipment | |
| CN203887373U (en) | Automatic vertical circular seam pipe welder | |
| CN215317036U (en) | Clamping jig for machining of valve body of stop valve | |
| CN108480889A (en) | A kind of bonding machine | |
| CN213830321U (en) | Diameter-variable flaring machine for PVC pipe production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |