CN108907012A - A kind of hydraulic direct-acting type steel pipe overall length expanding machine - Google Patents
A kind of hydraulic direct-acting type steel pipe overall length expanding machine Download PDFInfo
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- CN108907012A CN108907012A CN201810618866.7A CN201810618866A CN108907012A CN 108907012 A CN108907012 A CN 108907012A CN 201810618866 A CN201810618866 A CN 201810618866A CN 108907012 A CN108907012 A CN 108907012A
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- Prior art keywords
- expanding
- steel pipe
- expanding head
- rack
- head rack
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- 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
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses a kind of hydraulic direct-acting type steel pipe overall length expanding machines, including expanding head, expanding machine rack, steel pipe market system, hydraulic control system and electric control system, expanding head includes expanding head rack, several direct acting hydraulic cylinders and expander die, the cylinder part of direct acting hydraulic cylinder is circumferentially fixed on its external wall along expanding head rack, one end face of expander die is fixed with direct acting hydraulic cylinder, other end is cambered surface, expanding head rack is fixed by the connecting rod in expanding machine rack side, the fixed expanding head frame side of expanding machine rack is additionally provided with steel pipe market system, connecting rod is located at immediately below expanding head rack but non-contact, direct acting hydraulic cylinder is electrically connected with hydraulic control system, the electric control system that passes through of hydraulic control system and steel pipe market system is electrically connected with external power supply.Traditional cone bevel structure has been abandoned, radial expanding power is directly generated using direct acting hydraulic cylinder, the processing of the cone and skewback that involve great expense is avoided, equipment cost is greatly reduced.
Description
Technical field
The present invention relates to steel pipe manufacturing equipment technical field, especially a kind of hydraulic direct-acting type steel pipe overall length expanding machine, tool
Say to body to be a kind of according to expanding technology requirement, the machine of " sizing " and " sizing " is realized to steel pipe overall length diameter.
Background technique
Expanding steel pipe overall length is a kind of technique being machined to thick molding steel pipe overall length, by applying to steel pipe
Certain radial force makes steel pipe generate suitable plastic deformation, reaches the diameter and circularity of technique requirement, while eliminating part steel
Pipe internal stress.Existing pipe expanding equipment is all made of cone bevel structure and transmits expanding power, specifically produced using hydraulic cylinder
Raw axial force is converted and is amplified by cone bevel structure expanding power radially, completes expanding movement.Existing cone is oblique
The expanding structure in face has the following problems：Firstly, cone structure is complicated, requirement on machining accuracy is high, and mechanical processing difficulty is big, uses
Maintenance cost is high；Secondly, generating very big friction between cone and inclined-plane during converting radial expanding power for axial force
Power not only greatly reduces the mechanical efficiency of equipment, more seriously will cause between cone and inclined-plane during the work time
Metal " stinging erosion " even " adhesion ", causes the damage of equipment, this proposes higher want to the abrasion resistance and hardness of cone material
It asks.So steel pipe overall length expanding machine, which seeks new structure, to be necessary.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of hydraulic direct-acting type steel pipe overall length expanding machine, the inventions
The first purpose is to provide a kind of simple, practical, the easy to implement novel hydraulic Direct Action Type steel pipe overall length expanding machine of structure.Mesh
Second is that the expanding function improves the reliability of production efficiency and equipment.
The technical solution adopted by the present invention to solve the technical problems is：A kind of hydraulic direct-acting type steel pipe overall length expanding machine,
It includes expanding head, expanding machine rack, steel pipe market system, hydraulic control system and electric control system, it is characterized in that：It is expanding
Head includes the expander die of expanding head rack, the direct acting hydraulic cylinder of several same sizes and several same sizes, several direct acting liquid
The cylinder part of cylinder pressure is circumferentially fixed on its external wall along expanding head rack, one end face of expander die and direct acting hydraulic cylinder
Piston rod end is fixed, and the other end of expander die is cambered surface, when several direct acting hydraulic cylinders are in range, each expander die
The cambered surface of tool is located on the circular arc of one concentric circles of expanding head rack, and expanding head rack is fixed by the connecting rod in expanding machine rack
Side, the fixed expanding head frame side of expanding machine rack are additionally provided with steel pipe market system, and steel pipe market system is parallel with connecting rod
And be located at below expanding head rack, several direct acting hydraulic cylinders are electrically connected with hydraulic control system, hydraulic control system and steel
The driving mechanism of pipe transportation system passes through electric control system and external power supply is electrically connected.
The connecting rod is cylindrical structure, and one end of cylinder is vertically fixedly connected with an end face of expanding head rack, circle
The other end of column is vertically fixedly connected with the end face that expanding machine rack is located at expanding head rack opposite side.
The expanding head rack is column structure, and there are retaining wall, expanding head machine in expanding head rack post external wall both ends outer
Several direct acting hydraulic cylinders of the circumferentially spaced fixation of cylinder outer wall between the retaining wall of frame both ends, retaining wall outer height are greater than expander die
Cambered surface height when off working state, cambered surface height when less than expander die working condition.
The cylinder of the expanding head rack is structure as a whole with the retaining wall for being located at its outer wall both ends outer.
The expanding head rack offer along its length through-hole formed connecting hole, the axle center of the connecting hole with it is expanding
The axle center of head rack is overlapped.
The aperture of the connecting hole and the aperture of connecting rod are adapted, and expanding head rack passes through the one of connecting hole and connecting rod
End is fixedly connected.
The outer wall of the columnar part of the expanding head rack is regular polygon structure, and each of them side is vertically fixed to be connected
It is connected to a direct acting hydraulic cylinder.
The outer wall of the columnar part of the expanding head rack is octagon structure, wherein eight direct acting hydraulic cylinders hang down respectively
Directly it is fixedly connected in the eight sides of expanding head rack columnar part outer wall.
The steel pipe market system be located at the underface of expanding head rack and with expanding head rack contact it is disconnected, steel pipe is defeated
Sending system position is that the axle center to expanding steel pipe for ensuring to place in steel pipe market system is overlapped with the axle center of expanding head rack.
The steel pipe market system is composed of a fixed connection by several carrying rollers for having lifting and rotation function.
The invention has the advantages that compared with prior art, which has abandoned traditional expanding structure in cone inclined-plane,
Radial expanding power is directly generated using direct moving type hydraulic cylinder, avoids processing and the long draw of the cone and skewback that involve great expense
The cost of equipment can be greatly reduced in structure.The present invention is more traditional, and expanding machine structure is more simple and compact, has novel innovation knot
Structure, design rationally, it is easy to maintain, while reducing equipment cost and use and maintenance cost, also improve production efficiency and
The reliability of equipment.The expanding power of the present invention is directly generated by direct moving type hydraulic cylinder, and huge friction between cone and inclined-plane is not present
Power, therefore the whole efficiency of expanding machine can be multiplied.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the partial view of A of the invention to expanding head off working state；
Fig. 3 is the partial view of A of the invention to expanding head working condition；
Fig. 4 is working condition sectional view of the invention；
Fig. 5 is working condition sectional view of the invention；
Fig. 6 is working condition sectional view of the invention；
In figure：1, expanding head；2, expanding machine rack；3, steel pipe market system；4, hydraulic control system；5, electric control system；
6, connecting rod；7, expanding head rack；8, direct acting hydraulic cylinder；9, expander die；10, connecting hole；11, carrying roller；12, to expanding steel
Pipe.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of hydraulic direct-acting type steel pipe overall length expanding machine, it includes expanding head 1, expanding machine rack 2, steel pipe market system 3, hydraulic
Control system 4 and electric control system 5, it is characterized in that：Expanding head 1 includes the direct acting liquid of expanding head rack 7, several same sizes
The cylinder part of the expander die 9 of cylinder pressure 8 and several same sizes, several direct acting hydraulic cylinders 8 is circumferentially fixed along expanding head rack 7
On its external wall, 9 one end face of expander die and the piston rod end of direct acting hydraulic cylinder 8 are fixed, the other end of expander die 9
Face is cambered surface, and when several direct acting hydraulic cylinders 8 are in range, the cambered surface of each expander die 9 is located at expanding head rack 7 one together
On the circular arc of heart circle, expanding head rack 7 is fixed on 2 side of expanding machine rack by connecting rod 6, and the fixation of expanding machine rack 2 is expanding
7 side of head rack is additionally provided with steel pipe market system 3, and steel pipe market system 3 is parallel with connecting rod 6 and is located under expanding head rack 7
Side, several direct acting hydraulic cylinders 8 are electrically connected with hydraulic control system 4, the drive of hydraulic control system 4 and steel pipe market system 3
Motivation structure passes through electric control system 5 and external power supply is electrically connected.
The present invention has abandoned traditional cone bevel structure, is directly generated using the direct acting hydraulic cylinder 8 of several same sizes
Radial expanding power, avoids the processing of the cone and skewback that involve great expense, equipment cost is greatly reduced.It is expanding head rack 7, several
The direct acting hydraulic cylinder 8 of same size and the expander die 9 of several same sizes constitute an expanding head 1；Electrical control system
System 5 is electrically connected with external power supply, and the driving mechanism of steel pipe market system 3 is electrical by electric control system 5 and external power supply
Connection, under the control of electric control system 5, the pipe end to expanding steel pipe 12 is moved into expanding head 1 by steel pipe market system 3, and
Realize that the axle center to expanding steel pipe 12 is aligned with the axle center of expanding head 1；Several direct acting hydraulic cylinders 8 are electric with hydraulic control system 4
Property connection, the driving mechanism of hydraulic control system 4 passes through electric control system 5 and external power supply and is electrically connected, in electric-controlled
System 5 processed, hydraulic control system 4 control under, several direct acting hydraulic cylinders 8 drive expander dies 9, and radially synchronous reciprocating moves,
Realize the expansion for treating expanding 12 caliber of steel pipe；Pipe end to expanding steel pipe 12 is removed expanding head by last steel pipe market system 3
1, the expanding work of pipe end is completed at this time.Expanding head rack 7 is fixed on 2 side of expanding machine rack by connecting rod 6, strengthens expanding
The stability of head rack 7, equipment working service is at low cost, and connecting rod 6 is parallel with steel pipe market system 3, steel pipe market system 3
Traffic direction is consistent with the traffic direction to expanding steel pipe 12, and connecting rod 6 ensure that the expanding stroke of overall length to expanding steel pipe 12.
Embodiment 2
As shown in Figure 1, Figure 2 and Figure 3, it is to improve on the basis of embodiment 1, and the expanding head rack 7 is column structure, is expanded
There is retaining wall in 7 cylinder outer wall both ends outer of diameter head rack, and the cylinder outer wall between 7 both ends retaining wall of expanding head rack is circumferentially spaced
Fixed several direct acting hydraulic cylinders 8, retaining wall outer height are greater than cambered surface height when 9 off working state of expander die, are less than expanding
Cambered surface height when 9 working condition of mold.
The cylinder of the expanding head rack 7 is structure as a whole with the retaining wall for being located at its outer wall both ends outer.
The expanding head rack 7 offers through-hole along its length and forms connecting hole 10, the axle center of the connecting hole 10
It is overlapped with the axle center of expanding head rack 7.
There is a retaining wall in the 7 cylinder outer wall both ends outer of expanding head rack of column structure, the cylinder of expanding head rack 7 and its outside
The retaining wall of wall both ends outer is structure as a whole, and expanding head rack 7 offers concentric pylone connecting hole 10 along its length, connection
Hole 10 facilitates the fixed installation of expanding head rack 7, simple and compact for structure, and equipment dependability is high, improves job stability, the present invention
Hydraulic direct-acting type steel pipe overall length expanding machine during use, it is readily replaceable if there is environment division parts damages, drop
Low equipment cost.Several direct acting hydraulic cylinders 8 of the circumferentially spaced fixation of cylinder outer wall between 7 both ends retaining wall of expanding head rack,
The piston rod end of direct acting hydraulic cylinder 8 is fixed with an end face of expander die 9, another end face of expander die 9 is cambered surface,
The cambered surface of each expander die 9 is located on the circular arc of 7 one concentric circles of expanding head rack, and cambered surface adapts to the pipe to expanding steel pipe 12
Diameter, both ends armlet forms the operation interval of expander die 9, under electric control system 5, the drive control of hydraulic control system 4,
Expander die 9 does radial expansion and contractile motion under the drive of direct acting hydraulic cylinder 8, realizes to expanding 12 overall length caliber of steel pipe
Expansion.By generating expanding power by direct acting hydraulic cylinder 8, huge frictional force between cone and inclined-plane, is eliminated in customer service existing structure
To expanding steel pipe 12 and expander die 9 " stinging erosion " or " adhesion " in the course of work, therefore can be by the whole efficiency of expanding machine at double
Increase, reduces while equipment is faked and improve production efficiency.
Embodiment 3
As shown in Figures 1 to 6, it is to improve on the basis of embodiment 1, and the connecting rod 6 is cylindrical structure, one end of cylinder
It is vertically fixedly connected with an end face of expanding head rack 7, the other end and expanding machine rack 2 of cylinder are located at expanding head rack 7
The end face of opposite side is vertically fixedly connected.
The aperture of the connecting hole 10 and the aperture of connecting rod 6 are adapted, and expanding head rack 7 passes through connecting hole 10 and connection
One end of bar 6 is fixedly connected.
6 one end of connecting rod and expanding machine rack 2 are fixed, and the other end of connecting rod 6, which nests into, realizes connection in connecting hole 10
The fixation of bar 6 and expanding head rack 7, according to the different manufacturing technique requirents to expanding steel pipe 12, some wait for expanding steel pipe 12
Need to length range carry out it is expanding, can improve the service life of equipment with the size of flexible choice connecting rod 6, reduce and set
Standby cost.
Embodiment 4
As shown in Figures 2 and 3, it is to improve on the basis of embodiment 1, the outer wall of the columnar part of the expanding head rack 7
It is regular polygon structure, each of them side is vertically fixedly connected with a direct acting hydraulic cylinder 8.
The outer wall of the columnar part of the expanding head rack 7 is octagon structure, wherein eight direct acting hydraulic cylinders 8 are distinguished
Vertically it is fixedly connected in the eight sides of 7 columnar part outer wall of expanding head rack.
The cylinder outer wall of expanding head rack 7 is regular polygon structure, convenient uniformly fixed direct acting hydraulic cylinder 8, and then is driven
Radially synchronous reciprocating moves expander die 9, different expander dies 9 is corresponded to the diameter of expanding steel pipe 12 according to difference, directly
The quantity of hydrodynamic cylinder pressure 8 can be designed arrangement as required, at this time the quantity on the side of regular polygon structure and direct acting hydraulic cylinder 8
Quantity be consistent, realize and various specifications waited for the applicability of expanding steel pipe 12.
Embodiment 5
As shown in Fig. 1, Fig. 4, Fig. 5 and Fig. 6, it is to improve on the basis of embodiment 1,
The steel pipe market system 3 is located at the underface of expanding head rack 7 and contacts with expanding head rack 7 disconnected, and steel pipe is defeated
Sending 3 position of system is the axle center weight in the axle center and expanding head rack 7 to expanding steel pipe 12 for ensuring to place in steel pipe market system 3
It closes.
The steel pipe market system 3 is composed of a fixed connection by several carrying rollers 11 for having lifting and rotation function.
The driving mechanism of steel pipe market system 3 is electrically connected by electric control system 5 and external power supply, in electrical control
Under the control of system 5, steel pipe market system 3 will move into expanding head 1 to expanding steel pipe 12, and realize the axle center to expanding steel pipe 12
It is aligned with the axle center of expanding head 1, particularly the axle center to expanding steel pipe 12 and expanding head rack 7 are realized in the lifting of carrying roller 11
The rotation of center alignment, carrying roller 11 is realized to expanding steel pipe 12 into and out expanding head 1.Expanding head 1, which is expanded, can only once expand
Diameter waits for the certain width i.e. operation interval of expanding steel pipe 12, and steel pipe market system 3 will deliver again one to expanding steel pipe 12
Operation interval, the steel pipe of this expanding interval range repeat the above method, until completing entirely to expanding 12 overall length width model of steel pipe
That encloses is expanding.
Steel pipe market system 3 and carrying roller 11 are existing mature technology, and specific lifting and rotation are in the present invention not specifically
It is bright, the protection scope of non-present invention.
The above description is only an embodiment of the present invention, is not intended to limit scope of patent protection of the invention, all utilizations
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content of the invention, is applied directly or indirectly in other phases
The technical field of pass, is included within the scope of the present invention.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not the present invention claims protection scope within.
Claims (10)
1. a kind of hydraulic direct-acting type steel pipe overall length expanding machine, it includes expanding head（1）, expanding machine rack（2）, steel pipe market system
（3）, hydraulic control system（4）And electric control system（5）, it is characterized in that：Expanding head（1）Including expanding head rack（7）, it is several
The direct acting hydraulic cylinder of same size（8）With the expander die of several same sizes（9）, several direct acting hydraulic cylinders（8）Cylinder body
Divide along expanding head rack（7）It is circumferentially fixed on its external wall, the expander die（9）One end face and direct acting hydraulic cylinder（8）Work
Stopper rod end is fixed, expander die（9）Other end be cambered surface, several direct acting hydraulic cylinders（8）It is each to expand when in range
Diameter mold（9）Cambered surface be located at expanding head rack（7）On the circular arc of one concentric circles, expanding head rack（7）Pass through connecting rod（6）
It is fixed on expanding machine rack（2）Side, expanding machine rack（2）Fixed expanding head rack（7）Side is additionally provided with steel pipe market system
（3）, steel pipe market system（3）And connecting rod（6）In parallel and it is located at expanding head rack（7）Lower section, several direct acting hydraulic cylinders（8）?
With hydraulic control system（4）It is electrically connected, hydraulic control system（4）And steel pipe market system（3）Driving mechanism pass through electricity
Gas control system（5）It is electrically connected with external power supply.
2. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 1, it is characterized in that：The connecting rod（6）
It is cylindrical structure, one end of cylinder and expanding head rack（7）An end face be vertically fixedly connected, the other end of cylinder and expanding
Machine rack（2）Positioned at expanding head rack（7）The end face of opposite side is vertically fixedly connected.
3. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 1, it is characterized in that：The expanding head rack
（7）It is column structure, expanding head rack（7）There are retaining wall, expanding head rack in cylinder outer wall both ends outer（7）Between the retaining wall of both ends
Several direct acting hydraulic cylinders of the circumferentially spaced fixation of cylinder outer wall（8）, retaining wall outer height is greater than expander die（9）Inoperative shape
Cambered surface height when state is less than expander die（9）Cambered surface height when working condition.
4. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 3, it is characterized in that：The expanding head rack
（7）Cylinder be located at its outer wall both ends outer retaining wall be structure as a whole.
5. a kind of according to claim 1, hydraulic direct-acting type steel pipe overall length expanding machine described in 3 or 4, it is characterized in that：It is described expanding
Head rack（7）Through-hole is offered along its length forms connecting hole（10）, the connecting hole（10）Axle center and expanding head machine
Frame（7）Axle center be overlapped.
6. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 5, it is characterized in that：The connecting hole（10）
Aperture and connecting rod（6）Aperture be adapted, expanding head rack（7）Pass through connecting hole（10）And connecting rod（6）One end it is solid
Fixed connection.
7. a kind of according to claim 1, hydraulic direct-acting type pipe end expanding machine described in 3 or 4, it is characterized in that：It is described expanding
Head rack（7）The outer wall of columnar part be regular polygon structure, each of them side is vertically fixedly connected with a direct acting
Hydraulic cylinder（8）.
8. a kind of hydraulic direct-acting type pipe end expanding machine according to claim 7, it is characterized in that：The expanding head rack
（7）The outer wall of columnar part be octagon structure, wherein eight direct acting hydraulic cylinders（8）Be respectively perpendicular be fixedly connected on it is expanding
Head rack（7）In the eight sides of columnar part outer wall.
9. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 1, it is characterized in that：The steel pipe market system
System（3）Positioned at expanding head rack（7）Underface and with expanding head rack（7）Contact disconnected, steel pipe market system（3）Position
To ensure steel pipe market system（3）Upper placement to expanding steel pipe（12）Axle center and expanding head rack（7）Axle center be overlapped.
10. a kind of hydraulic direct-acting type steel pipe overall length expanding machine according to claim 7, it is characterized in that：The steel pipe market
System（3）Has the carrying roller of lifting and rotation function by several（11）It is composed of a fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618866.7A CN108907012A (en) | 2018-06-15 | 2018-06-15 | A kind of hydraulic direct-acting type steel pipe overall length expanding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810618866.7A CN108907012A (en) | 2018-06-15 | 2018-06-15 | A kind of hydraulic direct-acting type steel pipe overall length expanding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108907012A true CN108907012A (en) | 2018-11-30 |
Family
ID=64420384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810618866.7A Pending CN108907012A (en) | 2018-06-15 | 2018-06-15 | A kind of hydraulic direct-acting type steel pipe overall length expanding machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN108907012A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895407A (en) * | 2021-01-26 | 2021-06-04 | 宜宾学院 | Thermoplastic pipeline expanding device |
| CN117920875A (en) * | 2024-03-21 | 2024-04-26 | 山东沃亚森曼机械科技有限公司 | Lever type steel pipe end expanding machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847527A (en) * | 1981-09-14 | 1983-03-19 | Nippon Kokan Kk <Nkk> | Hydraulic pipe expanding device |
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
| CN204470435U (en) * | 2015-02-04 | 2015-07-15 | 常州市腾田液压机械有限公司 | The expanding building mortion of heavy caliber composite bimetal pipe material |
-
2018
- 2018-06-15 CN CN201810618866.7A patent/CN108907012A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847527A (en) * | 1981-09-14 | 1983-03-19 | Nippon Kokan Kk <Nkk> | Hydraulic pipe expanding device |
| CN2363809Y (en) * | 1999-03-18 | 2000-02-16 | 武湘川 | Pipe expander |
| CN204470435U (en) * | 2015-02-04 | 2015-07-15 | 常州市腾田液压机械有限公司 | The expanding building mortion of heavy caliber composite bimetal pipe material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895407A (en) * | 2021-01-26 | 2021-06-04 | 宜宾学院 | Thermoplastic pipeline expanding device |
| CN117920875A (en) * | 2024-03-21 | 2024-04-26 | 山东沃亚森曼机械科技有限公司 | Lever type steel pipe end expanding machine |
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Application publication date: 20181130 |