CN111229959A - Efficient necking machine for sectional pipes - Google Patents
Efficient necking machine for sectional pipes Download PDFInfo
- Publication number
- CN111229959A CN111229959A CN202010093182.7A CN202010093182A CN111229959A CN 111229959 A CN111229959 A CN 111229959A CN 202010093182 A CN202010093182 A CN 202010093182A CN 111229959 A CN111229959 A CN 111229959A
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- angle
- core
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- 238000001125 extrusion Methods 0.000 claims abstract description 9
- 230000003139 buffering effect Effects 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 5
- 101000713575 Homo sapiens Tubulin beta-3 chain Proteins 0.000 claims 2
- 102100036790 Tubulin beta-3 chain Human genes 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 210000003739 neck Anatomy 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D41/00—Application of procedures in order to alter the diameter of tube ends
- B21D41/04—Reducing; Closing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The invention discloses a high-efficiency necking machine for a segment pipe, which structurally comprises a bottom operating box, a belt pipe and a necking body, wherein the bottom of a main operating box is connected with the upper surface of the bottom operating box, a butt angle is butted on a pipe body in a large area, a gap of each necking block in the moving process is butted by a seam extrusion edge, the inner butt angle supports the necking blocks in a certain radian, when the necking blocks on two sides are stressed, the necking blocks are movably extruded into required diameters according to the adjustment requirement, the bent mouths of the necking blocks are bent and extruded, when the necking machine necks the plate pipe, flaring gaps between the necking blocks are continuously attached, the necking blocks cannot be stretched due to gaps, when a connecting port arranged on the outer side of an outer bag body and the inner part is attached by butt arcs, the end of the necking machine has an inner arc bag effect, a certain force is supported by a hard inclined block and a force-extending angle, the pipe can be treated when the pipe body is positioned in the inner part, the other section is arranged on the outer side to carry out attached protection on the part at the middle end of the other section.
Description
Technical Field
The invention belongs to the field of necking machines, and particularly relates to an efficient necking machine for a segmented pipe.
Background
The connecting pipes are connected together by a plurality of sections of pipe joints, the diameters of the pipe joints are different, and the port of the pipe joint needs to be reduced and adjusted by a reducing machine to be in a corresponding diameter size.
Based on the findings of the inventor, the existing efficient necking machine mainly has the following defects, such as:
1. when the processed pipe body is rolled and combined by sheets, the pipe body is placed into a necking machine to carry out omnibearing necking, and when the opening of the pipe body is placed between gaps, the two sides are simultaneously stressed, and the opening can be stretched in the gap without interference force.
2. When the necking machine is used for necking the pipe body, a certain inclined radian exists between a necking part and an unprocessed part, and when a bent angle is supported at the outer end of the necking part to be hard extruded, the pipe body is easy to bend and break.
Therefore, a high-efficiency necking machine for the segmented pipe is needed.
Disclosure of Invention
In order to solve the problems that when the processed pipe body is rolled and combined by a sheet shape, the pipe body is placed into a necking machine to be subjected to omnibearing necking, when the joint of the pipe body is placed between gaps, stress is simultaneously carried out on two sides, the joint can be stretched out in the gap without interference force, when the pipe body is subjected to necking processing by the necking machine, a certain inclined radian exists between the necking part and the unprocessed part, and when a bent angle is propped against the outer end of the necking to be hard extruded, the pipe body is easy to bend and break.
The invention relates to a purpose and an effect of a high-efficiency necking machine for a sectional pipe, which are achieved by the following specific technical means:
the structure of the device comprises a bottom operating box, a belt pipe, a necking body and a main operating box.
The bottom of the main control box is connected with the upper surface of the bottom control box, the belt pipe is embedded into the inner part of the reducing body, and the reducing body is arranged at the upper end of the bottom control box.
As a further improvement of the invention, the necking body comprises an outer limit ring, a resisting angle, a necking block and a seam extrusion edge, the necking block is propped against the inner wall of the outer limit ring, the resisting angle is connected with the necking block, the seam extrusion edge is arranged on the outer surface of the necking block, the necking blocks are uniformly distributed in a circular shape, and the outer limit ring is of a circular ring-shaped structure.
As a further improvement of the invention, the seam extrusion edge comprises a butting angle, a rear arc strip, a superposed arc angle, a core pulling strip and a middle expansion core, wherein the butting angle is arranged between the core pulling strip and the middle expansion core, the superposed arc angle is attached to the outer surface of the rear arc strip, the middle expansion core is in a shape of a pointed end at two sides of a middle bulge, and four butting angles are arranged, and two butting angles are in a group.
As a further improvement of the invention, the rear arc strip comprises a fixing ball, two supporting angles, two force isolation layers and two bent openings, the supporting angles are arranged on the outer surface of the fixing ball and connected with the force isolation layers, the bent openings are attached to one ends, far away from the supporting angles, of the force isolation layers, the fixing ball is of a ball structure, the bent openings are of an arc structure, and the supporting angles are two.
As a further improvement of the invention, the core pulling strip comprises an arc edge, an elliptical section core, a rubber support strip and two arc support surfaces, the rubber support strip is connected with the arc edge, the rubber support strip is arranged on the outer surface of the elliptical section core, the arc support surfaces are arranged on the sides of the elliptical section core, the elliptical section core is of an elliptical structure, the rubber support strip is made of rubber materials and has certain pulling performance, the arc support surfaces are of a semi-arc structure, and the two arc edges are arranged.
As a further improvement of the invention, the outer limit ring comprises two arc-supporting parts, two directional arc heads, two inclination-supporting cores and an outer pocket body, wherein the arc-supporting parts are connected with the directional arc heads, the directional arc heads are installed on the outer surface of the inclination-supporting cores, the inclination-supporting cores are welded on the inner wall of the outer pocket body, and the inclination-supporting cores are provided with two inclination-supporting cores.
As a further improvement of the invention, the directional arc head comprises a top ball, a hard inclined block, a middle buffering ball and a force extending angle, wherein the force extending angle is arranged on the outer surface of the top ball, the hard inclined block is embedded in the middle buffering ball, the top ball is of a spherical structure, and the middle buffering ball is made of spherical rubber and has a buffering effect.
As a further improvement of the invention, the arc-resisting device comprises a rubber surface, rubber isolating strips, surface extending layers and rear isolating blocks, wherein the rubber surface is attached to the outer surface of the surface extending layers, the rubber isolating strips are arranged between the surface extending layers at intervals and connected with the rear isolating blocks, the number of the rubber surfaces is three, the rubber surfaces are in an arc structure, and the number of the rubber isolating strips is three.
Compared with the prior art, the invention has the following beneficial effects:
1. the large-area butt joint of the abutting angle is on the pipe body, the gap of the necking block in the moving process is butted by the seam extrusion edge, the inner abutting angle supports the necking block in a certain radian, when the necking blocks on two sides are stressed, the necking block is extruded into a required diameter according to the adjustment of the required movement, the bending of the necking block is subjected to bending extrusion, a fixed bending point is arranged when the necking block is integrally stressed, the stressed elliptic section core and the rubber supporting strip are bent and moved, the necking block can be released again after being stretched, when the necking machine performs necking on the plate pipe, the flaring gap between the necking block and the necking block is continuously attached, and the necking block cannot be stretched due to gaps.
2. When arranging one section and inside linking port in outer pocket body outside in, will be contradicted by the arc and follow attached, let separate the supplementary glued surface of adhesive tape and carry out inseparable following protection to the body, the outer end supports directional arc head by supporting the core that inclines, has the effect that an inner arc was held to its holistic end, supports certain power to it by the piece of inclining firmly with delaying the power angle, can be in the inside processing of body one section, another section is arranged in the outside and is carried out attached protection to the position of its middle-end.
Drawings
Fig. 1 is a schematic structural view of a high-efficiency necking machine for a segmented pipe of the invention.
Fig. 2 is a schematic front view of the internal structure of the necking body according to the present invention.
FIG. 3 is a schematic view of an internal structure of a seam piping according to the present invention.
FIG. 4 is a schematic front view of the inner structure of a rear arc bar according to the present invention.
FIG. 5 is a front view of an internal structure of a core pulling strip according to the present invention.
FIG. 6 is a left-side view of the inner structure of an outer limit ring according to the present invention.
Fig. 7 is a schematic front view of the inner structure of the directional arc head according to the present invention.
FIG. 8 is a schematic view of an internal structure of an arc striking device according to the present invention.
In the figure: a bottom operating box-tt 01, a belt tube-tt 01, a necking body-tt 01, a main operating box-tt 01, an outer limit ring-qw 01, an angle-qw 01, a necking block-qw 01, a seam extrusion edge-qw 01, an angle-a 1 01, a rear arc strip-a 2 01, an arc folding angle-a 3 01, a core pulling strip-a 4 01, a middle expansion core-a 5 01, a solid ball-www 01, a thrust angle-www 01, a force isolation layer-www 01, a bending opening-www 01, an arc edge-g 01, an oval core-g 01, a glue supporting strip-g 01, a supporting arc-g 01, an arc-zxc 01, an orientation arc-zxc 01, a tilting core-zxc 01, an outer body-zc 01, a ball-zxc 01, a glue holding ball-ddy-01, a top extension strip-ddy 01, a hard extension strip-ddy 01, a rear extension strip-ddy 01, a hard extension-01, a delayed extension strip-ddy 3, a hard extension-01, a hard extension strip-ddy 3, a soft extension layer-b 01.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
as shown in figures 1 to 5:
the invention provides a high-efficiency necking machine for a segmented pipe, which structurally comprises a bottom operation box tt01, a belt pipe tt02, a necking body tt03 and a main control box tt 04.
The bottom of the main control box tt04 is connected with the upper surface of a bottom control box tt01, the belt tube tt02 is embedded in a reducing body tt03, and the reducing body tt03 is arranged at the upper end of the bottom control box tt 01.
The notch body tt03 comprises an outer limit ring qw11, a resisting angle qw22, a notch block qw33 and a notch squeezing edge qw44, wherein the notch block qw33 is propped against the inner wall of an outer limit ring qw11, the resisting angle qw22 is connected with the notch block qw33, the notch squeezing edge qw44 is installed on the outer surface of the notch block qw33, the notch blocks qw33 are circularly and uniformly distributed, the outer limit ring qw11 is of a circular ring structure, the resisting angle qw22 can be in large-area interference with the surface of a required notch, the notch block qw33 is squeezed into a required diameter according to required movement adjustment, the notch squeezing edge qw44 plays an interference role in a gap of position movement, and the outer limit ring qw11 limits the maximum range.
The seam extrusion edge qw44 comprises a butting angle a1a, a rear arc strip a2a, a folding arc angle a3a, a core pulling strip a4a and a middle expansion core a5a, the butting angle a1a is installed between the core pulling strip a4a and the middle expansion core a5a, the folding arc angle a3a is attached to the outer surface of the rear arc strip a2a, the middle expansion core a5a is in a shape of a pointed head at two sides which are convex, the butting angle a1a is provided with four or two, the four or two cores form a group, the middle expansion core a5a is arranged at the middle ends of the two sides and plays a role in pushing the two sides reversely, the butting angle a1a enables the outer layer to have a certain tendency to be positioned, and the core pulling strip a4a is in a state of pulling and stretching when being integrally stressed.
The rear arc strip a2a comprises a fixed force ball www1, a supporting angle www2, a spacing layer www3 and a bent opening www4, wherein the supporting angle www2 is installed on the outer surface of the fixed force ball www1, the supporting angle www2 is connected with the spacing layer www3, one end, away from the supporting angle www2, of the spacing layer www3 is attached with the bent opening www4, the fixed force ball www1 is of a spherical structure and is provided with two, the bent opening www4 is of an arc structure, the supporting angle www2 is provided with two, the fixed force ball www1 fixes a force bearing point, the supporting angle www2 enables the outer layer of the whole body to have a inclined guide, the spacing layer www3 exerts a spacing force on two sides, and the bent opening www4 fixes a bending point when the whole body is bent.
The core pulling strip a4a comprises an arc edge g11, an oval core g22, a rubber supporting strip g33 and a supporting arc surface g44, the rubber supporting strip g33 is connected with the arc edge g11, the rubber supporting strip g33 is installed on the outer surface of the oval core g22, the supporting arc surface g44 is arranged on the side of the oval core g22, the oval core g22 is of an oval structure, the rubber supporting strip g33 is made of rubber and has certain pulling performance, the supporting arc surface g44 is of a semi-arc structure, the number of the arc edge g11 is two, the stressed points on two sides of the fixed position of the arc edge g11 are points, the overall stressed nodes can be uniformly distributed on the oval core g22, the rubber supporting strip g33 is in an extending and contracting state when the overall stress is applied, so that the rubber supporting strip g44 can be pulled in time and abutted against the large-area external object surface.
The specific use mode and function of the embodiment are as follows:
in the invention, a pipe body needing necking is placed into a necking body tt03, a necking block qw33 in the necking body tt03 is shrunk to a required diameter by the operation of a main operation box tt04, a supporting angle qw22 is in large-area contact with the pipe body, a gap of the necking block qw33 in the moving process is in contact with a seam squeezing edge qw44, stretching and zooming are carried out by the moving distance of a necking block qw33 between a core pulling strip a4a and two sides, the supporting angle a1a in the inner part supports the pipe body in a certain radian, when the necking blocks qw33 on the two sides are stressed, a supporting arc g44 is continuously attached to the surface of the pipe body, when the gap of the necking block qw33 is continuously shrunk and combined, a rear arc strip a2a drives the supporting angle www 84 to warp inwards, so that the curved opening www4 is subjected to bending and squeezing, the supporting arc 465 a is connected with a rear arc a and is connected in a pulling strip in the core pulling core to transfer the stretching and expanding core pulling strip 585, the supporting core pulling strip 585 a and the core pulling 465 a in the core pulling strip 465, when the gap of the necking piece qw33 is continuously reduced, the core pulling strip a4a and the abutting angle a1a will be squeezed into the middle expansion core a5a, and after the necking piece qw33 is stretched, the core pulling strip will be released again.
Example 2:
as shown in fig. 6 to 8:
the outer limit ring qw11 includes an arc zxc1, an arc orientation zxc2, an inclination core zxc3 and an outer pocket zxc4, the arc zxc1 is connected with the arc orientation zxc2, the arc orientation zxc2 is mounted on the outer surface of the inclination core zxc3, the inclination core zxc3 is welded on the inner wall of the outer pocket zxc4, two arc orientations zxc1 are provided, two inclination cores zxc3 are provided, the arc orientations zxc1 change along with the surface shape of an external object, the arc orientation zxc2 has an inner arc pocket effect on the whole end of the arc orientation zxc2, and the inclination core zxc3 supports the outer layer with a certain force.
The directional arc head zxc2 includes top end ball dd01, hard incline block dd02, well slow ball dd03, power extension angle dd04, power extension angle dd04 is installed in top end ball dd01 surface, hard incline block dd02 is embedded inside well slow ball dd03, top end ball dd01 is the spheroid structure, well slow ball dd03 is spheroid rubber material, has the effect of buffering, top end ball dd01 carries out protection to a certain extent to its tip of atress, power extension angle dd04 lets the outer layer have the slope support of an angle, well slow ball dd03 is when internal support power expands outward, plays the effect of protection, hard incline block dd02 drives certain hard power.
The arc pushing zxc1 comprises a rubber surface ss1, rubber separating strips ss2, a surface extending layer ss3 and a rear spacing block ss4, wherein the rubber surface ss1 is attached to the outer surface of the surface extending layer ss3, the rubber separating strips ss2 are arranged between the surface extending layers ss3 at intervals, the rubber separating strips ss2 are connected with the rear spacing block ss4, the rubber surfaces ss1 are three and arc-shaped, the rubber separating strips ss2 are three, the rubber separating strips ss2 are spaced at stressed end parts and cannot be pressed together, the rubber surfaces ss1 can collide with foreign objects in a large area, and the rear spacing block ss4 supports the approximate whole area according to the change of the surface morphology of the foreign objects.
The specific use mode and function of the embodiment are as follows:
in the invention, when the pipe body is arranged in the outer limit ring qw11 for processing, one end is arranged in the inner part and the other end is arranged on the outer side, when one end arranged on the outer side of the outer pocket body zxc4 is connected with an inner connection port, the abutting arc zxc1 is abutted, followed and attached, the adhesive surface ss1 is supported at the connection position of the necking part of the pipe body and the outer side in a large area, the rear spacing block ss4 fixes the approximate position of the adhesive surface ss1, the adhesive spacing strip ss2 is used for assisting the adhesive surface ss1 to carry out tight following protection on the pipe body, the outer end is supported by the abutting core zxc3 to carry out the directional arc zxc2, the ball dd01 at the top end of the directional arc zxc2 is abutted against the outermost side of the adhesive surface ss1 by hard force, and the hard inclined block dd02 and the extension angle 04 are used for supporting the directional arc zxc1 to wrap the outer side smoothly.
The technical solutions of the present invention or similar technical solutions designed by those skilled in the art based on the teachings of the technical solutions of the present invention are all within the scope of the present invention to achieve the above technical effects.
Claims (8)
1. A high-efficient necking machine of section pipe, its structure includes bottom control box (tt01), takes pipe (tt02), throat body (tt03), main control box (tt04), its characterized in that:
the bottom of the main control box (tt04) is connected with the upper surface of the bottom control box (tt01), the belt pipe (tt02) is embedded in the reducing body (tt03), and the reducing body (tt03) is installed at the upper end of the bottom control box (tt 01).
2. The efficient necking machine for the segmented pipes, according to claim 1, is characterized in that: the mouth reducing body (tt03) comprises an outer limit ring (qw11), a butt angle (qw22), a mouth reducing block (qw33) and a seam squeezing edge (qw44), wherein the mouth reducing block (qw33) butts against the inner wall of the outer limit ring (qw11), the butt angle (qw22) is connected with the mouth reducing block (qw33), and the seam squeezing edge (qw44) is installed on the outer surface of the mouth reducing block (qw 33).
3. The efficient necking machine for the segmented pipes, according to claim 2, is characterized in that: the seam extrusion edge (qw44) comprises a butt angle (a1a), a rear arc strip (a2a), a folding arc angle (a3a), a core pulling strip (a4a) and a middle expansion core (a5a), wherein the butt angle (a1a) is installed between the core pulling strip (a4a) and the middle expansion core (a5a), and the folding arc angle (a3a) is attached to the outer surface of the rear arc strip (a2 a).
4. The efficient necking machine for the segmented pipes, according to claim 3, is characterized in that: the rear arc strip (a2a) comprises a solid force ball (www1), a supporting angle (www2), a force isolation layer (www3) and a bent opening (www4), wherein the supporting angle (www2) is installed on the outer surface of the solid force ball (www1), the supporting angle (www2) is connected with the force isolation layer (www3), and the bent opening (www4) is attached to one end, away from the supporting angle (www2), of the force isolation layer (www 3).
5. The efficient necking machine for the segmented pipes, according to claim 3, is characterized in that: it includes arc limit (g11), oval festival core (g22), glue support strip (g33), holds in the palm cambered surface (g44) to pull core strip (a4a), glue and hold in the palm strip (g33) and be connected with arc limit (g11), glue and hold in the palm strip (g33) and install in oval festival core (g22) surface, hold in the palm cambered surface (g44) and locate oval festival core (g22) side.
6. The efficient necking machine for the segmented pipes, according to claim 2, is characterized in that: the outer limit ring (qw11) comprises an arc abutting (zxc1), an oriented arc head (zxc2), an inclination abutting core (zxc3) and an outer pocket body (zxc4), wherein the arc abutting (zxc1) is connected with the oriented arc head (zxc2), the oriented arc head (zxc2) is installed on the outer surface of the inclination abutting core (zxc3), and the inclination abutting core (zxc3) is welded on the inner wall of the outer pocket body (zxc 4).
7. The efficient necking machine for the segmented pipes, according to claim 6, is characterized in that: the orientation arc head (zxc2) comprises a top ball (dd01), a hard inclined block (dd02), a middle buffering ball (dd03) and a force extending angle (dd04), wherein the force extending angle (dd04) is installed on the outer surface of the top ball (dd01), and the hard inclined block (dd02) is embedded in the middle buffering ball (dd 03).
8. The efficient necking machine for the segmented pipes, according to claim 6, is characterized in that: the arc pushing device is characterized in that the arc pushing (zxc1) comprises a rubber surface (ss1), a rubber separation strip (ss2), a surface extending layer (ss3) and a rear separation block (ss4), wherein the rubber surface (ss1) is attached to the outer surface of the surface extending layer (ss3), the rubber separation strip (ss2) is mounted between the surface extending layers (ss3) at intervals, and the rubber separation strip (ss2) is connected with the rear separation block (ss 4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093182.7A CN111229959B (en) | 2020-02-14 | 2020-02-14 | Efficient necking machine for sectional pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010093182.7A CN111229959B (en) | 2020-02-14 | 2020-02-14 | Efficient necking machine for sectional pipes |
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| Publication Number | Publication Date |
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| CN111229959A true CN111229959A (en) | 2020-06-05 |
| CN111229959B CN111229959B (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010093182.7A Active CN111229959B (en) | 2020-02-14 | 2020-02-14 | Efficient necking machine for sectional pipes |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020464A (en) * | 2021-03-29 | 2021-06-25 | 四川慧海杨帆贸易有限公司 | Necking machine for die processing machinery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3600927A (en) * | 1968-12-30 | 1971-08-24 | Continental Can Co | Necking die with floating center post |
| CN2136084Y (en) * | 1992-09-29 | 1993-06-16 | 第一汽车制造厂工艺处 | Floating arbor type precision diameter reducing mould for thin-walled tube |
| CN204396712U (en) * | 2014-12-22 | 2015-06-17 | 重庆江华橡塑制造有限公司 | Leaf spring back bush undergauge frock |
| CN110193562A (en) * | 2019-07-03 | 2019-09-03 | 浙江宏泽自动化设备有限公司 | Short tube material necking machine |
-
2020
- 2020-02-14 CN CN202010093182.7A patent/CN111229959B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3600927A (en) * | 1968-12-30 | 1971-08-24 | Continental Can Co | Necking die with floating center post |
| CN2136084Y (en) * | 1992-09-29 | 1993-06-16 | 第一汽车制造厂工艺处 | Floating arbor type precision diameter reducing mould for thin-walled tube |
| CN204396712U (en) * | 2014-12-22 | 2015-06-17 | 重庆江华橡塑制造有限公司 | Leaf spring back bush undergauge frock |
| CN110193562A (en) * | 2019-07-03 | 2019-09-03 | 浙江宏泽自动化设备有限公司 | Short tube material necking machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020464A (en) * | 2021-03-29 | 2021-06-25 | 四川慧海杨帆贸易有限公司 | Necking machine for die processing machinery |
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| CN111229959B (en) | 2021-08-06 |
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Effective date of registration: 20210720 Address after: 264000 No. 6, No. 88, Jialingjiang Road, Yantai Economic and Technological Development Zone, Yantai area, China (Shandong) pilot Free Trade Zone, Jinan City, Shandong Province Applicant after: YANTAI DONGXING AIR-CONDITIONER PIPELINE Co.,Ltd. Address before: 315100 Block C, No. 66, Qingyi Road, high tech Zone, Ningbo, Zhejiang Applicant before: Tan Dengfu |
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