CN108889859A - A kind of steel lining stainless steel internal thread tube piece combined-machining equipment - Google Patents
A kind of steel lining stainless steel internal thread tube piece combined-machining equipment Download PDFInfo
- Publication number
- CN108889859A CN108889859A CN201810962558.6A CN201810962558A CN108889859A CN 108889859 A CN108889859 A CN 108889859A CN 201810962558 A CN201810962558 A CN 201810962558A CN 108889859 A CN108889859 A CN 108889859A
- Authority
- CN
- China
- Prior art keywords
- inner tube
- linear actuator
- outer tube
- unit
- sectional shelf
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 238000003754 machining Methods 0.000 title claims abstract description 11
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 11
- 239000010935 stainless steel Substances 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 238000010079 rubber tapping Methods 0.000 claims abstract description 34
- 230000005611 electricity Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001360 synchronised effect 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
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The present invention relates to a kind of steel lining stainless steel internal thread tube piece combined-machining equipments, including sectional shelf-unit, and positioned at the outer tube inlet pipe device and inner tube inlet pipe device of sectional shelf-unit axial ends, sectional shelf-unit is internally provided with outer pepe gripper；Outer pepe gripper includes the linear actuator A that several groups are symmetrically disposed on sectional shelf-unit both lateral sides two-by-two, the outer manifold clamp of connection on the linear drives end A of linear actuator A；Outer tube inlet pipe device includes outer tube sliding sleeve, fixed straight line driver B on the other end of outer tube sliding sleeve, and the outer tube being slidably connected with aforementioned outer tube sliding sleeve is connected on linear actuator B connection pushing plate A, pushing plate A and pushes column, outer tube pushes column to be provided with tapping motor A；Inner tube inlet pipe device is set to the axial other end of sectional shelf-unit；Inner tube sliding sleeve connects linear actuator C, and inner tube is connected on the C connection of linear drives end the pushing plate B, pushing plate B of linear actuator C and pushes set, inner tube pushes the end of set that tapping motor B is arranged.
Description
Technical field
The present invention relates to a kind of steel lining stainless steel internal thread tube piece combined-machining equipments, belong to pipe fitting manufacture field.
Background technique
The technique of composite pipe is similar with multiple tube, exactly connects outer tube in inner tube outer cover and realizes manufacture, has one in pipe fitting
Kind internal thread tube piece is to process screw thread in the inside for meeting pipe fitting；But because being composite pipe, when carrying out tapping, it is easy to
Because the twisting resistance that tapping knife namely follows threading tool makes that local detachment occurs between inner and outer tubes, and then influences the company of pipe fitting
Connect intensity and resistance to corrosion.
Summary of the invention
The technical problem to be solved by the present invention is to：Overcome the skill of compound internal thread tube piece screw thread process difficulty in the prior art
Art problem provides a kind of steel lining stainless steel internal thread tube piece combined-machining equipment.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of steel lining stainless steel internal thread tube piece combined-machining equipment, including sectional shelf-unit, positioned at sectional shelf-unit axial ends
Outer tube inlet pipe device and inner tube inlet pipe device, the sectional shelf-unit are internally provided with outer pepe gripper；Wherein the sectional shelf-unit is
Frame-type structure, the outer pepe gripper include the linear actuator A that several groups are symmetrically disposed on sectional shelf-unit both lateral sides two-by-two,
Being connected by a hinge on the linear drives end A of the linear actuator A has a sliding seat；The outer pepe gripper further includes two
The outer manifold clamp of a mirror symmetry setting, the sliding seat are slidably connected to the back of outer manifold clamp, the outer manifold clamp it is interior
Side is provided with the holding tank that bottom of the radian less than 90 ° is arc surfaced；The outer tube inlet pipe device includes an outer tube sliding sleeve,
Axial one end of sectional shelf-unit is fixed in one end of the outer tube sliding sleeve, and a branch is fixed on the other end of the outer tube sliding sleeve
Several groups linear actuator B is symmetrically arranged on fagging A, the support plate A, the linear drives end B of the linear actuator B is worn
It crosses on support plate A connection one pushing plate A, the pushing plate A and is connected with the outer tube being slidably connected with aforementioned outer tube sliding sleeve
Column is pushed, the outer tube pushes the end of column to be provided with an annular outer tube and pushes set, and the outer tube pushes the middle part of set right
The end position for answering outer tube to push column is provided with a tapping motor A, is provided with and attacks on the rotary output of the tapping motor A
Threading tool A；Said inner tube inlet pipe device is set to the axial other end of sectional shelf-unit, and said inner tube inlet pipe device includes that an inner tube is sliding
Set, one end of said inner tube sliding sleeve are rotationally connected with the end of sectional shelf-unit, and the wall coaxial of said inner tube sliding sleeve is fixed with one
The driving ring gear of a annular is provided with rotation of at least two groups for driving aforementioned driving ring gear to rotate in the end of sectional shelf-unit
Driving motor, is provided on the motor shaft of rotary drive motor and driving gear that aforementioned driving ring gear engages；Said inner tube is sliding
It is fixed on the other end of set on support plate a B, the support plate B and is symmetrically arranged with several groups linear actuator C, it is described straight
The linear drives end C of line drive C is connected with an inner tube on support plate connection one pushing plate B, the pushing plate B and pushes away
Dynamic set, said inner tube push the end of set to be provided with annular and its inner wall section and push ring for the inner tube of tapered configuration,
The bottom of said inner tube promotion set, which is fixed on the linear drives end D of linear actuator a D, the linear actuator D, to be arranged
There is a tapping motor B, is provided with tapping knife B, the outer wall of the tapping motor B on the rotary output of the tapping motor B
It is provided with a support sleeve, the support sleeve and inner tube push to be slidably connected between the inner wall covered.
As a further improvement of the present invention, linear actuator A, linear actuator B, linear actuator C are linear drives
Cylinder；Linear actuator D is linear stepping motor.
As a further improvement of the present invention, the transverse ends of the sectional shelf-unit are each provided with a pipe fitting outer wall and follow tooth
Knife, the pipe fitting outer wall follow threading tool and are fixed on a tool apron, the tool apron by linear actuator E and sectional shelf-unit it
Between be flexibly connected.
As a further improvement of the present invention, the linear actuator E is linear drives cylinder.
The beneficial effects of the invention are as follows：
1, the present invention by inner and outer tubes it is chimeric while, screw thread process is synchronized to inner tube, while passing through outer tube
Clamper squeezes outer tube, so that reducing the later period after inner tube, outer tube combination is processing inner tube caused by screw thread, outer tube generation
The problem of gap.
2, inner tube may be implemented by the tapping motor and an inner tube promotion set rotated of two groups of reverse rotations in this structure
It is opposite can to reduce inner tube when carrying out tapping to inner tube for being torqued into formula combination and driven by rotation to inner tube relative to outer tube
The torsion degree of outer tube.
3, the different location clamping in the axial direction of outer manifold clamp may be implemented in the linear actuator A of array setting of the present invention
The adjustment of power, reduce inner tube insertion when, outer tube because be pressurized and occur bird caging, while guarantee outer tube clamping force and
Cladding dynamics.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is structural schematic diagram of the invention；
In figure：1, sectional shelf-unit；2, linear actuator A；3, sliding seat；4, outer manifold clamp；5, linear actuator E；6, outside pipe fitting
Wall follows threading tool；7, outer tube sliding sleeve；8, support plate A；9, pushing plate A；10, linear actuator B；11, outer tube pushes column；12, tapping
Motor A；13, tapping knife A；14, rotary drive motor；15, gear is driven；16, support plate B；17, pushing plate B；18, inner tube pushes away
Dynamic set；19, linear actuator D；20, tapping motor B；21, support sleeve；22, tapping knife B；23, inner tube pushes ring；Inner tube sliding sleeve.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention.
As shown in Figure 1, the present invention is a kind of steel lining stainless steel internal thread tube piece combined-machining equipment, including sectional shelf-unit,
Positioned at the outer tube inlet pipe device and inner tube inlet pipe device of sectional shelf-unit axial ends, the sectional shelf-unit is internally provided with outer tube grip
Device；Wherein the sectional shelf-unit is frame-type structure, and the outer pepe gripper includes that several groups are symmetrically disposed on sectional shelf-unit two-by-two
Being connected by a hinge on the linear drives end A of the linear actuator A, the linear actuator A of both lateral sides has a sliding seat；
A pipe fitting outer wall is each provided on the inside of the transverse ends of the sectional shelf-unit and follows threading tool, and the pipe fitting outer wall follows threading tool and is fixed on
On one tool apron, the tool apron between a linear actuator E and sectional shelf-unit by being flexibly connected.
The outer pepe gripper further includes the outer manifold clamp of two mirror symmetries setting, and the sliding seat is slidably connected to outer
The back of manifold clamp is provided with the holding tank that bottom of the radian less than 90 ° is arc surfaced on the inside of the outer manifold clamp；Institute
Stating outer tube inlet pipe device includes an outer tube sliding sleeve, and axial one end of sectional shelf-unit is fixed in one end of the outer tube sliding sleeve, described
It is fixed on the other end of outer tube sliding sleeve on support plate an A, the support plate A and is symmetrically arranged with several groups linear actuator B,
The linear drives end B of the linear actuator B is passed through and is connected with one on support plate A connection one pushing plate A, the pushing plate A
A outer tube being slidably connected with aforementioned outer tube sliding sleeve pushes column, and the outer tube pushes the end of column to be provided with an annular outer tube
Push set, the end position that the outer tube pushes the middle part of set correspond to outer tube promotion column is provided with a tapping motor A, described to attack
Tapping knife A is provided on the rotary output of tooth motor A；Said inner tube inlet pipe device is set to the axial other end of sectional shelf-unit,
Said inner tube inlet pipe device includes an inner tube sliding sleeve, and one end of said inner tube sliding sleeve is rotationally connected with the end of sectional shelf-unit, institute
The wall coaxial for stating inner tube sliding sleeve is fixed with an annular driving ring gear, and the end of sectional shelf-unit is provided at least two groups and uses
It is provided with and aforementioned sliding tooth on the rotary drive motor for driving aforementioned driving ring gear rotation, the motor shaft of rotary drive motor
The driving gear of ring engagement；It is fixed on the other end of said inner tube sliding sleeve on support plate a B, the support plate B and symmetrically sets
It is equipped with several groups linear actuator C, the linear drives end C of the linear actuator C passes through support plate and connects a pushing plate B,
Be connected with inner tube on the pushing plate B and push set, said inner tube push the end of set be provided with one it is annular and its in
Wall section is that the inner tube of tapered configuration pushes ring, and said inner tube pushes the bottom of set to be fixed with a linear actuator D, described straight
It is provided with a tapping motor B on the linear drives end D of line drive D, is provided on the rotary output of the tapping motor B
Tapping knife B, the outer wall of the tapping motor B are provided with a support sleeve, and the support sleeve and inner tube push between the inner wall of set
It is slidably connected.
Linear actuator A, linear actuator B, linear actuator C, linear actuator E are linear drives cylinder；Straight line drives
Dynamic device D is linear stepping motor.
In use, inner tube is installed in inner tube sliding sleeve, while making the outer wall of inner tube one end be embedded in inner tube and pushing ring
On；Outer tube is installed in outer tube sliding sleeve, while the outer wall of outer tube one end being made to be embedded in the inner wall that outer tube pushes set；Lead to simultaneously
It crosses linear actuator B and linear actuator C relatively moves inner and outer tubes, while mobile, by local outer tube and interior
Pipe clamp is held between outer tube clamping plate, so that inner pipe end and outer tube end contact, and it is constantly nested against one another, outer manifold clamp is because living
It is dynamic to be connected to inside sectional shelf-unit, it is possible to inclination clamps, while by linear actuator D by tapping motor B towards inner tube
One end is mobile, carries out tapping to inner tube one end by tapping knife B, while by driving the internal pipe sliding sleeve of ring gear to carry out rotation drive
It is dynamic, to the inner tube one opposite opposite driving force in the direction of rotation tapping motor B, the rotation of inner tube is reduced, guarantees inner and outer tubes
Socket that can be smooth, socket to the end when, the tapping motor A of the other side is rotated with the direction opposite with tapping motor B, with
The continuous extruding of inner tube is moved, and carries out the processing of screw thread to other end inner tube by tapping knife A.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (4)
1. a kind of steel lining stainless steel internal thread tube piece combined-machining equipment, it is characterized in that：Including sectional shelf-unit, it is located at sectional shelf-unit
The outer tube inlet pipe device and inner tube inlet pipe device of axial ends, the sectional shelf-unit are internally provided with outer pepe gripper；It is wherein described
Sectional shelf-unit is frame-type structure, and the outer pepe gripper includes that several groups are symmetrically disposed on the straight of sectional shelf-unit both lateral sides two-by-two
Being connected by a hinge on the linear drives end A of line drive A, the linear actuator A has a sliding seat；The outer tube grip
Device further includes the outer manifold clamp of two mirror symmetries setting, and the sliding seat is slidably connected to the back of outer manifold clamp, described outer
The holding tank that bottom of the radian less than 90 ° is arc surfaced is provided on the inside of manifold clamp；The outer tube inlet pipe device includes one
Axial one end of sectional shelf-unit is fixed in a outer tube sliding sleeve, one end of the outer tube sliding sleeve, on the other end of the outer tube sliding sleeve
It is fixed on support plate an A, the support plate A and is symmetrically arranged with several groups linear actuator B, the linear actuator B's
Linear drives end B is connected with one on support plate A connection one pushing plate A, the pushing plate A and slides with aforementioned outer tube sliding sleeve
The outer tube of dynamic connection pushes column, and the outer tube pushes the end of column to be provided with an annular outer tube and pushes set, and the outer tube pushes away
The middle part of dynamic set corresponds to the rotation output that outer tube pushes the end position of column to be provided with tapping motor an A, the tapping motor A
Tapping knife A is provided on end；Said inner tube inlet pipe device is set to the axial other end of sectional shelf-unit, and said inner tube inlet pipe device includes
One inner tube sliding sleeve, one end of said inner tube sliding sleeve are rotationally connected with the end of sectional shelf-unit, and the outer wall of said inner tube sliding sleeve is same
Axis is fixed with an annular driving ring gear, is provided at least two groups for driving aforementioned driving ring gear in the end of sectional shelf-unit
The rotary drive motor of rotation, is provided on the motor shaft of rotary drive motor and driving gear that aforementioned driving ring gear engages；
It is fixed on the other end of said inner tube sliding sleeve on support plate a B, the support plate B and is symmetrically arranged with several groups linear drives
The linear drives end C of device C, the linear actuator C are passed through to be connected on support plate connection one pushing plate B, the pushing plate B
One inner tube pushes set, and said inner tube pushes the end of set to be provided with annular and its inner wall section as the interior of tapered configuration
Pipe pushes ring, and said inner tube pushes the bottom of set to be fixed with a linear actuator D, the linear drives of the linear actuator D
It is provided with a tapping motor B on the D of end, tapping knife B, the tapping electricity are provided on the rotary output of the tapping motor B
The outer wall of machine B is provided with a support sleeve, and the support sleeve and inner tube push to be slidably connected between the inner wall covered.
2. a kind of steel lining stainless steel internal thread tube piece combined-machining equipment as described in claim 1, it is characterized in that：Linear drives
Device A, linear actuator B, linear actuator C are linear drives cylinder；Linear actuator D is linear stepping motor.
3. a kind of steel lining stainless steel internal thread tube piece combined-machining equipment as described in claim 1, it is characterized in that：The combination
The transverse ends of bracket are each provided with a pipe fitting outer wall and follow threading tool, and the pipe fitting outer wall follows threading tool and is fixed on a tool apron,
The tool apron between a linear actuator E and sectional shelf-unit by being flexibly connected.
4. a kind of steel lining stainless steel internal thread tube piece combined-machining equipment as described in claim 1, it is characterized in that：The straight line
Driver E is linear drives cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962558.6A CN108889859B (en) | 2018-08-22 | 2018-08-22 | Composite processing equipment for stainless steel internal thread pipe fitting with steel lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962558.6A CN108889859B (en) | 2018-08-22 | 2018-08-22 | Composite processing equipment for stainless steel internal thread pipe fitting with steel lining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108889859A true CN108889859A (en) | 2018-11-27 |
| CN108889859B CN108889859B (en) | 2024-03-12 |
Family
ID=64358234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810962558.6A Active CN108889859B (en) | 2018-08-22 | 2018-08-22 | Composite processing equipment for stainless steel internal thread pipe fitting with steel lining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108889859B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB515415A (en) * | 1938-07-26 | 1939-12-05 | Superflexit | Improvements in or relating to a method of attaching unions to flexible tubing |
| CN2567427Y (en) * | 2002-04-29 | 2003-08-20 | 国世波 | Compositedtube joint and pipeline connecting device with the joint |
| CN1943907A (en) * | 2006-11-02 | 2007-04-11 | 李国鳌 | Double screw hot rolling composite device and its composite process for bimetal pipe |
| EP2067590A2 (en) * | 2007-12-05 | 2009-06-10 | J.H. & Wilhelm Finger GmbH & CO. KG | Composite pipe and method for its production |
| CN201470785U (en) * | 2009-08-03 | 2010-05-19 | 江苏众信绿色管业科技有限公司 | Bimetal multi-unit tube metal spinning combined device |
| CN102359697A (en) * | 2011-10-18 | 2012-02-22 | 华汇建设集团有限公司 | Full corrosion-resistant connection structure of steel lining plastic composite pipeline |
| CN203635711U (en) * | 2014-01-07 | 2014-06-11 | 宜昌利民管业科技有限公司 | Composite pipe machine with stainless steel lining |
| CN104338862A (en) * | 2014-09-29 | 2015-02-11 | 李世昌 | Equipment for molding and pressurizing composite pipe with stainless steel lining and operation method thereof |
| DE102015104334A1 (en) * | 2015-03-23 | 2016-09-29 | Zs Zylinder-Service Gmbh | Apparatus for producing a double-walled pipe |
| CN206617673U (en) * | 2017-02-20 | 2017-11-07 | 新昌县广远管业有限公司 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
| CN107497951A (en) * | 2017-08-21 | 2017-12-22 | 海隆管道工程技术服务有限公司 | A kind of lined composite steel tube socket joint welding system and hold insertion method |
| CN107790848A (en) * | 2017-11-01 | 2018-03-13 | 周亮 | A kind of air-conditioning copper pipe welding fixed equipment |
| CN208772309U (en) * | 2018-08-22 | 2019-04-23 | 江苏众信绿色管业科技有限公司 | A kind of steel lining stainless steel internal thread tube piece combined-machining equipment |
-
2018
- 2018-08-22 CN CN201810962558.6A patent/CN108889859B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB515415A (en) * | 1938-07-26 | 1939-12-05 | Superflexit | Improvements in or relating to a method of attaching unions to flexible tubing |
| CN2567427Y (en) * | 2002-04-29 | 2003-08-20 | 国世波 | Compositedtube joint and pipeline connecting device with the joint |
| CN1943907A (en) * | 2006-11-02 | 2007-04-11 | 李国鳌 | Double screw hot rolling composite device and its composite process for bimetal pipe |
| EP2067590A2 (en) * | 2007-12-05 | 2009-06-10 | J.H. & Wilhelm Finger GmbH & CO. KG | Composite pipe and method for its production |
| CN201470785U (en) * | 2009-08-03 | 2010-05-19 | 江苏众信绿色管业科技有限公司 | Bimetal multi-unit tube metal spinning combined device |
| CN102359697A (en) * | 2011-10-18 | 2012-02-22 | 华汇建设集团有限公司 | Full corrosion-resistant connection structure of steel lining plastic composite pipeline |
| CN203635711U (en) * | 2014-01-07 | 2014-06-11 | 宜昌利民管业科技有限公司 | Composite pipe machine with stainless steel lining |
| CN104338862A (en) * | 2014-09-29 | 2015-02-11 | 李世昌 | Equipment for molding and pressurizing composite pipe with stainless steel lining and operation method thereof |
| DE102015104334A1 (en) * | 2015-03-23 | 2016-09-29 | Zs Zylinder-Service Gmbh | Apparatus for producing a double-walled pipe |
| CN206617673U (en) * | 2017-02-20 | 2017-11-07 | 新昌县广远管业有限公司 | The screw connection structure of liner two-phase stainless steel composite steel pipe |
| CN107497951A (en) * | 2017-08-21 | 2017-12-22 | 海隆管道工程技术服务有限公司 | A kind of lined composite steel tube socket joint welding system and hold insertion method |
| CN107790848A (en) * | 2017-11-01 | 2018-03-13 | 周亮 | A kind of air-conditioning copper pipe welding fixed equipment |
| CN208772309U (en) * | 2018-08-22 | 2019-04-23 | 江苏众信绿色管业科技有限公司 | A kind of steel lining stainless steel internal thread tube piece combined-machining equipment |
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| Publication number | Publication date |
|---|---|
| CN108889859B (en) | 2024-03-12 |
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