CN108838309A - Special-shaped teeth internal screwed copper tube spinning mold - Google Patents
Special-shaped teeth internal screwed copper tube spinning mold Download PDFInfo
- Publication number
- CN108838309A CN108838309A CN201810873021.2A CN201810873021A CN108838309A CN 108838309 A CN108838309 A CN 108838309A CN 201810873021 A CN201810873021 A CN 201810873021A CN 108838309 A CN108838309 A CN 108838309A
- Authority
- CN
- China
- Prior art keywords
- spinning
- ring
- steel ball
- spinning apparatus
- copper tube
- 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.)
- Pending
Links
- 238000009987 spinning Methods 0.000 title claims abstract description 179
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 56
- 239000010949 copper Substances 0.000 title claims abstract description 56
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 49
- 239000010959 steel Substances 0.000 claims abstract description 49
- 238000010586 diagram Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/08—Making helical bodies or bodies having parts of helical shape internal screw-threads
Abstract
The present invention provides special-shaped teeth internal screwed copper tube spinning mold, including rotating die sleeve, first spinning apparatus and the second spinning apparatus, die sleeve housing is rotated outside the first spinning apparatus and the second spinning apparatus, first spinning apparatus and the second spinning apparatus and rotation die sleeve coaxial arrangement, first spinning apparatus includes the first spinning ring, second spinning ring and the first steel ball group, symmetrical arcuate furrow is offered on the opposite face of first spinning ring and the second spinning ring, the arcuate furrow of the arcuate furrow of first spinning ring and the second spinning ring is opposite to form semi-circular grooves, the steel ball of first steel ball group is distributed in semi-circular grooves, second spinning apparatus includes third spinning ring, 4th spinning ring and the second steel ball group, it is characterized in that, rotation die sleeve inner wall has an annular convex platform, the boss keeps apart the first spinning apparatus and the second spinning apparatus.Two sets of spinning apparatus are mounted on the same rotating mould and put on by the present invention, and radial position and spinning force of the different spinning apparatus steel balls on spinning ring can be adjusted respectively.
Description
Technical field
The present invention relates to inner screw thread copper pipe processing technique fields, especially special-shaped teeth internal screwed copper tube spinning device field.
Background technique
Seamless internal thread copper pipe is very widely used in refrigerating field, and air conditioner condensation can be made in seamless internal thread copper pipe
Device, radiator etc., the internal thread structure of copper pipe inner wall are a significant increase the heat exchange surface area of copper pipe inner wall, improve heat exchange
Efficiency.Internal thread machining in seamless internal thread copper pipe generallys use outer mold, the mode of interior die assembly carries out machine-shaping,
Outer mold generallys use (steel ball) spinning machine；Interior mold generally includes travel core, connecting rod, screw thread core print composition, screw thread core print
Thread groove is equipped with above circumference, entire copper pipe moves under the action of traction mechanism, and copper pipe is mobile, passes through screw thread core print and steel ball
Between gap when, the high-speed rotating steel ball of spinning machine to copper pipe outer surface carry out spinning, squeeze copper pipe outer make
Copper pipe inner wall, which extends, enters the interior formation internal screw thread of thread groove of thread core head surface, demoulds after screw thread core print, after sizing
Mould just completes the process of internal screw thread tooth.Specifically, high-speed rotating steel ball needs are outer matches a pair of of spinning ring to fix
Steel ball, spinning ring need to be encased in work head again, and work head connects high-speed motor, to form the high-speed rotating spinning of steel ball
Mechanism.The processing of copper pipe internal screw thread is by the circumferential interior compression steel ball of spinning, and a pair of of spinning ring inside is arc-shaped and steel ball, rotation
Pressure ring is squeezed to steel ball direction, will form a downward pressure to steel ball, the downward pressure of steel ball and steel ball are in spinning
The dynamic lower high speed rotation around copper pipe formed of annulus forms spinning to copper pipe wall, to be pressed into screw thread core print in inside pipe wall
In mold, the processing of interior table groove tooth is formd.The circumferential inside of spinning is squeezed, then steel ball floats downwards, and spinning ring unclamps then steel ball
It will float upwards under copper pipe reaction, so as to form the adjustment of Working position.Therefore the opposite position of spinning ring and steel ball
Setting is the key that form steel ball to be pressed down against power and operating position, needs to constantly regulate in production.In order to further increase copper
The inner wall surface area of pipe, now with a kind of special-shaped teeth internal screwed copper tube, also referred to as two-wire inner screw thread copper pipe, i.e., there are two for copper pipe inner wall
The screw thread (two groups of screw threads, screw thread are different from the angle of axis) that group is interweaved, and the processing for special-shaped teeth internal screwed copper tube,
Two sets of spinning machines and corresponding two external threadings core print are needed, one kind as shown in 106623553 B of Chinese patent literature CN is double
Line forming of internal thread copper pipes device is equipped with step of threads core print, second level screw thread core print, level-one spinning machine, second level spinning machine,
But the document is not explained with regard to the spinning ring of two-stage spinning machine and how adjusting for steel ball relative position.
Summary of the invention
The object of the present invention is to provide a kind of spinning rings and steel ball relative position tune for being conducive to simplify two-stage spinning machine
Whole special-shaped teeth internal screwed copper tube spinning mold.
Special-shaped teeth internal screwed copper tube spinning mold of the invention, including rotation die sleeve, the first spinning apparatus and the second spinning
Device rotates die sleeve housing outside the first spinning apparatus and the second spinning apparatus, the first spinning apparatus and the second spinning apparatus with
Rotate die sleeve coaxial arrangement, first spinning apparatus include the first spinning ring, the second spinning ring and the first steel ball group, first
Symmetrical arcuate furrow, the arcuate furrow of the first spinning ring and the second rotation are offered on the opposite face of spinning ring and the second spinning ring
The arcuate furrow of pressure ring is opposite to form semi-circular grooves, and the steel ball of the first steel ball group is distributed in semi-circular grooves, and described the
Two spinning apparatus include third spinning ring, the 4th spinning ring and the second steel ball group, third spinning ring and the 4th spinning ring it is opposite
Symmetrical arcuate furrow, the arcuate furrow of third spinning ring and the opposite formation half of the arcuate furrow of the 4th spinning ring are offered on face
The steel ball of circular groove, the second steel ball group is distributed in semi-circular grooves, and the axial ends for rotating die sleeve is respectively fixed with first
End cap and second end cover, the inside of the first cover board have the first engaging portion being resisted against on the first spinning apparatus, in the second cover board
Side has the second engaging portion being resisted against on the second spinning apparatus, characterized in that rotation die sleeve inner wall has an annular convex platform, should
Boss keeps apart the first spinning apparatus and the second spinning apparatus.
Above-mentioned special-shaped teeth internal screwed copper tube spinning mold, which is characterized in that the first engaging portion is resisted against the first spinning ring
On, the second engaging portion is resisted against the 4th spinning ring.
Above-mentioned special-shaped teeth internal screwed copper tube spinning mold, which is characterized in that be equipped between first end cover and rotation die sleeve
Gasket.Gasket is added and subtracted between rotation die sleeve and first end cover, can be along rotation axially adjustable (displacement) first end cover of die sleeve, it can
With adjust the first spinning apparatus the first spinning ring, the second spinning ring relative axial position, and then adjust steel ball in spinning ring
Radial position and spinning force in semi-circular grooves.
Above-mentioned special-shaped teeth internal screwed copper tube spinning mold, which is characterized in that be equipped between second end cover and rotation die sleeve
Gasket.Gasket is added and subtracted between rotation die sleeve and second end cover, can be along rotation axially adjustable (displacement) second end cover of die sleeve, it can
With adjust the second spinning apparatus third spinning ring, the 4th spinning ring relative axial position, and then adjust steel ball in spinning ring
Radial position and spinning force in semi-circular grooves.
Above-mentioned special-shaped teeth internal screwed copper tube spinning mold, which is characterized in that first end cover and second end cover pass through fixation
Screw is fixed on rotating mould and puts on.
It is an advantage of the current invention that the boss design among rotation die sleeve, two sets of spinning dresses can be filled by making to rotate in die sleeve
It sets, i.e. the first spinning apparatus and the second spinning apparatus, in addition being located at the first end cover and second end cover difference at rotation die sleeve both ends
The first spinning apparatus and the second spinning apparatus are acted on, two sets of spinning apparatus work are not interfere with each other, while being advantageously implemented two sets
Spinning apparatus is mounted on the same rotating mould and puts on, but diameter of the steel ball of different spinning apparatus in spinning ring semi-circular grooves
It can be adjusted respectively to position and spinning force.
Detailed description of the invention
Fig. 1 is the inner screw thread copper pipe processing unit (plant) structural representation for having used special-shaped teeth internal screwed copper tube spinning mold of the invention
Figure.
Fig. 2 is the rotation die sleeve structure schematic diagram of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Fig. 3 is the rotation die sleeve axial end face schematic diagram of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Fig. 4 is the first end cover structural schematic diagram of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Fig. 5 is the first end cover end view of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Fig. 6 is the second end cover structural schematic diagram of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Fig. 7 is the second end cover end view of special-shaped teeth internal screwed copper tube spinning mold of the invention.
Specific embodiment
When the embodiment of the present invention refers to the ordinal numbers such as " first ", " second ", unless based on context its express really it is suitable
The meaning of sequence, it should be understood that only play differentiation and be used.
In the following, the present invention is described further in conjunction with attached drawing and specific embodiment,
In conjunction with Fig. 1, abnormity teeth internal screwed copper tube spinning mold use provided by the invention is in internal screw thread copper tube processing device
In, which includes the traction mechanism of the pre- drawing-die 7 of tube reducing for being located at 6 outside of copper pipe, driving copper pipe movement
(not shown), copper pipe is interior to be equipped with connecting rod 61, and one end of the connecting rod 61 is equipped with prestretching core print corresponding with the pre- drawing-die 7 of tube reducing
71, the connecting rod other end is equipped with step of threads core print 81 and second level screw thread core print 82, the outside of copper pipe and the corresponding position of screw thread core print
Equipped with special-shaped teeth internal screwed copper tube spinning mold 9.Special-shaped teeth internal screwed copper tube spinning mold, including rotation die sleeve 1, the first spinning
Device 2 and the second spinning apparatus 3 rotate die sleeve housing outside the first spinning apparatus and the second spinning apparatus, the first spinning apparatus
With the second spinning apparatus and rotation die sleeve coaxial arrangement, first spinning apparatus includes the first spinning ring 21, the second spinning
Offer symmetrical arcuate furrow on the opposite face of ring 22 and the first steel ball group 23, the first spinning ring and the second spinning ring, first
The arcuate furrow of the arcuate furrow of spinning ring and the second spinning ring is opposite to form semi-circular grooves, the steel ball distribution of the first steel ball group
In semi-circular grooves, second spinning apparatus includes third spinning ring 31, the 4th spinning ring 32 and the second steel ball group 33,
Symmetrical arcuate furrow, the arcuate furrow of third spinning ring and are offered on the opposite face of third spinning ring and the 4th spinning ring
The arcuate furrow of four spinning rings is opposite to form semi-circular grooves, and the steel ball of the second steel ball group is distributed in semi-circular grooves, rotation
The axial ends of die sleeve be respectively fixed with annular first end cover 4 and annular second end cover 5, in conjunction with Fig. 4, first end cover it is interior
Side has the first engaging portion 44 being resisted against on the first spinning ring, and in conjunction with Fig. 6, the inside of second end cover, which has, is resisted against the 4th rotation
Second engaging portion 53 of pressure ring, in conjunction with Fig. 2 and Fig. 3, rotating die sleeve inner wall has an annular convex platform 11, and the boss is by the first spinning
Device and the second spinning apparatus are kept apart, and two sets of spinning apparatus work are not interfere with each other.In conjunction with Fig. 1, first end cover and rotating mould
It is equipped with gasket 41 between set, is equipped with gasket 51 between second end cover and rotation die sleeve.It puts on and is equipped in conjunction with Fig. 2 and Fig. 3 rotating mould
One group of totally 3 through-hole 13 being axially arranged of totally 3 threaded holes 12 being axially arranged and one group, threaded hole 12, through-hole 13 are along rotation
The circumferential direction of die sleeve is uniformly distributed, and first end cover is equipped with one group of totally 3 counterbores 42 corresponding with threaded hole 12 and one group totally 3 and through-hole
13 corresponding holes 43, each counterbore 42 and through-hole 13 are uniformly distributed along the circumferential direction of first end cover, and second end cover is equipped with one group of totally 3 and through-hole
13 corresponding threaded holes 52, the counterbore 42 that the first fixed screw 14 passes through first end cover is combined with threaded hole 12, by first end cover
It is fixed on rotation die sleeve, the second screw 15 passes through hole 43 and through-hole 13 along first end cover and combined with threaded hole 52, by second end cover
It is fixed on rotation die sleeve, i.e. first end cover 4 and second end cover 5 is fixed by screws in rotating mould and puts on.By in rotation die sleeve
Gasket 41 is added and subtracted between first end cover, it can be along rotation axially adjustable (displacement) first end cover 4 of die sleeve, adjustment the first spinning dress
The first spinning ring, the second spinning ring relative axial position set, and then the steel ball for adjusting the first steel ball group is semicircle in spinning ring
Radial position and spinning force on groove；It, can be along rotating mould by adding and subtracting gasket between rotation die sleeve and second end cover
Axially adjustable (displacement) first end cover 4 is covered, third spinning ring, the 4th axially opposing position of spinning ring of the second spinning apparatus are adjusted
It sets, and then adjusts radial position and spinning force of the steel ball of the first steel ball group in spinning ring semi-circular grooves.Boss 11 has
It is mounted on the same rotating mould conducive to two sets of spinning apparatus of realization to put on, but the steel ball of different spinning apparatus is semicircle in spinning ring
Radial position and spinning force on groove can be adjusted respectively, not interfere with each other.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection scope of the claims in the present invention
Within.
Claims (9)
1. special-shaped teeth internal screwed copper tube spinning mold, including rotation die sleeve (1), the first spinning apparatus (2) and the second spinning apparatus
(3), rotation die sleeve housing is outside the first spinning apparatus and the second spinning apparatus, the first spinning apparatus and the second spinning apparatus and rotation
Revolving die set coaxial arrangement, first spinning apparatus include the first spinning ring (21), the second spinning ring (22) and the first steel ball
Symmetrical arcuate furrow, the arc of the first spinning ring are offered on the opposite face of group (23), the first spinning ring and the second spinning ring
The arcuate furrow of groove and the second spinning ring is opposite to form semi-circular grooves, and the steel ball of the first steel ball group is distributed in semi-circular grooves
Interior, second spinning apparatus includes third spinning ring (31), the 4th spinning ring (32) and the second steel ball group (33), third rotation
Symmetrical arcuate furrow, the arcuate furrow and the 4th spinning of third spinning ring are offered on the opposite face of pressure ring and the 4th spinning ring
The arcuate furrow of ring is opposite to form semi-circular grooves, and the steel ball of the second steel ball group is distributed in semi-circular grooves, rotates die sleeve
Axial ends is respectively fixed with the first cover board (4) and the second cover board (5), and the inside of the first cover board, which has, is resisted against the first spinning dress
The first engaging portion set, the second cover board inside have the second engaging portion being resisted against on the second spinning apparatus, characterized in that rotation
Revolving die set inner wall has an annular convex platform (11), which keeps apart the first spinning apparatus and the second spinning apparatus.
2. abnormity teeth internal screwed copper tube spinning mold according to claim 1, which is characterized in that the first engaging portion is resisted against
On first spinning ring, the second engaging portion is resisted against the 4th spinning ring.
3. abnormity teeth internal screwed copper tube spinning mold according to claim 1 or 2, which is characterized in that the first cover board and rotation
Gasket is equipped between revolving die set.
4. abnormity teeth internal screwed copper tube spinning mold according to claim 1 or 2, which is characterized in that the second cover board and rotation
Gasket is equipped between revolving die set.
5. abnormity teeth internal screwed copper tube spinning mold according to claim 3, which is characterized in that the second cover board and rotating mould
Gasket is equipped between set.
6. abnormity teeth internal screwed copper tube spinning mold according to claim 1 or 2, which is characterized in that the first cover board (4) and
Second cover board (5) is fixed by screws in rotating mould and puts on.
7. abnormity teeth internal screwed copper tube spinning mold according to claim 3, which is characterized in that the first cover board (4) and the
Two cover boards (5) are fixed on rotating mould by fixed screw and put on.
8. abnormity teeth internal screwed copper tube spinning mold according to claim 4, which is characterized in that the first cover board (4) and the
Two cover boards (5) are fixed on rotating mould by fixed screw and put on.
9. abnormity teeth internal screwed copper tube spinning mold according to claim 5, which is characterized in that the first cover board (4) and the
Two cover boards (5) are fixed on rotating mould by fixed screw and put on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810873021.2A CN108838309A (en) | 2018-08-02 | 2018-08-02 | Special-shaped teeth internal screwed copper tube spinning mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810873021.2A CN108838309A (en) | 2018-08-02 | 2018-08-02 | Special-shaped teeth internal screwed copper tube spinning mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108838309A true CN108838309A (en) | 2018-11-20 |
Family
ID=64192397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810873021.2A Pending CN108838309A (en) | 2018-08-02 | 2018-08-02 | Special-shaped teeth internal screwed copper tube spinning mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108838309A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209320U (en) * | 1986-11-22 | 1987-12-09 | 电子工业部第十二研究所 | Double-layer ball spinning mould |
| DE4241811C1 (en) * | 1992-12-11 | 1994-02-03 | Leifeld Gmbh & Co | Appts. for producing a pot-shaped workpiece with internal thread - having protruding rod-shaped bodies for cutting circumferential grooves across the threading as workpiece is produced |
| US20020104350A1 (en) * | 2000-06-06 | 2002-08-08 | Tetsuya Sumitomo | Apparatus for manufacturing internal grooved tube |
| RU2199035C1 (en) * | 2001-06-11 | 2003-02-20 | Анна Евгеньевна Тер-Нерсесьянц | Spring nut and method of manufacture of spring nuts |
| CN101284297A (en) * | 2007-04-13 | 2008-10-15 | 覃昌钢 | Processing method and apparatus of internal thread aluminium pipe |
| CN202129326U (en) * | 2011-05-26 | 2012-02-01 | 哈尔滨工程大学 | Radial clearance adjustable double-layer roll ball spinning device |
| CN202169307U (en) * | 2011-08-16 | 2012-03-21 | 江苏兴荣美乐铜业有限公司 | Synchronous type planet steel-ball rotary pressing device capable of increasing the extensibility of an internal thread copper pipe |
| CN202199657U (en) * | 2011-09-01 | 2012-04-25 | 江苏兴荣美乐铜业有限公司 | Spinning device applied to machining of small internal threaded copper pipe |
| CN203972573U (en) * | 2014-08-13 | 2014-12-03 | 江苏仓环铜业股份有限公司 | The formed spinning device that a kind of on-line control Mick is heavy |
| CN204247792U (en) * | 2014-11-15 | 2015-04-08 | 广东龙丰精密铜管有限公司 | Seamless riffled tube formed spinning mould |
| CN204724658U (en) * | 2015-06-23 | 2015-10-28 | 江苏兴荣美乐铜业有限公司 | Light-duty high accuracy dynamic balancing chip removal inner screw thread copper pipe spinning device |
| CN207343540U (en) * | 2017-08-23 | 2018-05-11 | 佛山市顺德区精艺万希铜业有限公司 | For manufacturing the spinning ring of copper pipe internal thread |
| CN208527975U (en) * | 2018-08-02 | 2019-02-22 | 海亮奥托铜管（广东）有限公司 | Special-shaped teeth internal screwed copper tube spinning mold |
-
2018
- 2018-08-02 CN CN201810873021.2A patent/CN108838309A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209320U (en) * | 1986-11-22 | 1987-12-09 | 电子工业部第十二研究所 | Double-layer ball spinning mould |
| DE4241811C1 (en) * | 1992-12-11 | 1994-02-03 | Leifeld Gmbh & Co | Appts. for producing a pot-shaped workpiece with internal thread - having protruding rod-shaped bodies for cutting circumferential grooves across the threading as workpiece is produced |
| US20020104350A1 (en) * | 2000-06-06 | 2002-08-08 | Tetsuya Sumitomo | Apparatus for manufacturing internal grooved tube |
| RU2199035C1 (en) * | 2001-06-11 | 2003-02-20 | Анна Евгеньевна Тер-Нерсесьянц | Spring nut and method of manufacture of spring nuts |
| CN101284297A (en) * | 2007-04-13 | 2008-10-15 | 覃昌钢 | Processing method and apparatus of internal thread aluminium pipe |
| CN202129326U (en) * | 2011-05-26 | 2012-02-01 | 哈尔滨工程大学 | Radial clearance adjustable double-layer roll ball spinning device |
| CN202169307U (en) * | 2011-08-16 | 2012-03-21 | 江苏兴荣美乐铜业有限公司 | Synchronous type planet steel-ball rotary pressing device capable of increasing the extensibility of an internal thread copper pipe |
| CN202199657U (en) * | 2011-09-01 | 2012-04-25 | 江苏兴荣美乐铜业有限公司 | Spinning device applied to machining of small internal threaded copper pipe |
| CN203972573U (en) * | 2014-08-13 | 2014-12-03 | 江苏仓环铜业股份有限公司 | The formed spinning device that a kind of on-line control Mick is heavy |
| CN204247792U (en) * | 2014-11-15 | 2015-04-08 | 广东龙丰精密铜管有限公司 | Seamless riffled tube formed spinning mould |
| CN204724658U (en) * | 2015-06-23 | 2015-10-28 | 江苏兴荣美乐铜业有限公司 | Light-duty high accuracy dynamic balancing chip removal inner screw thread copper pipe spinning device |
| CN207343540U (en) * | 2017-08-23 | 2018-05-11 | 佛山市顺德区精艺万希铜业有限公司 | For manufacturing the spinning ring of copper pipe internal thread |
| CN208527975U (en) * | 2018-08-02 | 2019-02-22 | 海亮奥托铜管（广东）有限公司 | Special-shaped teeth internal screwed copper tube spinning mold |
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