CN110640017B - Composite material pipe compression molding device and method - Google Patents

Composite material pipe compression molding device and method Download PDF

Info

Publication number
CN110640017B
CN110640017B CN201810674757.7A CN201810674757A CN110640017B CN 110640017 B CN110640017 B CN 110640017B CN 201810674757 A CN201810674757 A CN 201810674757A CN 110640017 B CN110640017 B CN 110640017B
Authority
CN
China
Prior art keywords
sleeve
compression molding
composite material
material pipe
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810674757.7A
Other languages
Chinese (zh)
Other versions
CN110640017A (en
Inventor
段友智
侯倩
岳慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
Original Assignee
China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Petroleum and Chemical Corp, Sinopec Research Institute of Petroleum Engineering filed Critical China Petroleum and Chemical Corp
Priority to CN201810674757.7A priority Critical patent/CN110640017B/en
Publication of CN110640017A publication Critical patent/CN110640017A/en
Application granted granted Critical
Publication of CN110640017B publication Critical patent/CN110640017B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00Other methods for working sheet metal, metal tubes, metal profiles
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/08Screens or liners
    • E21B43/086Screens with preformed openings, e.g. slotted liners

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention provides a composite material pipe compression molding device and a method, comprising the following steps: the outer diameter of the fixed shaft is matched with the inner diameter of the pipe to be compressed; the base, be equipped with on it with the fixed recess of the tip assorted of fixed axle and center on fixed recess is radial arrangement's draw-in groove compression design sleeve, comprises a plurality of sleeve lamella, the tip of sleeve lamella with the draw-in groove phase-match. The invention can uniformly compress the pipe to be formed to the required wall thickness and ensure that the inner diameter and the length of the pipe are not changed, and the processed and formed composite material pipe not only meets the requirements on the size, but also reaches the standard in the aspects of appearance and performance. The composite material pipe compression molding device has the advantages of simple structure, safety, reliability, economy, high efficiency and simple and convenient operation, and is not only suitable for compression molding of the composite material pipe in the self-expansion sieve tube, but also suitable for compression molding of any other compressible pipe.

Description

Composite material pipe compression molding device and method
Technical Field
The invention relates to the technical field of composite material pipe forming, in particular to a composite material pipe compression forming device and method.
Background
The existing horizontal well sand control completion at home and abroad can be divided into independent screen pipe completion with an annular space between a screen pipe and a well wall and annular space filling completion with a high-permeability gravel filling layer formed between the screen pipe and the well wall according to the construction effect. The independent sieve tube well completion process is simple, the cost is relatively low, but the well completion effect is limited, and the effective period of the well completion is short; the gravel pack well completion effect is good, the effective period is long, but the well completion pipe column and the construction process are complex, the construction period is long, and the well completion cost and the risk are high.
The novel self-expansion sieve tube well completion technology can combine the advantages of gravel packing well completion technology and independent sieve tube well completion technology, achieves the purpose of realizing annular space packing well completion effect by using the independent sieve tube well completion simple technology, effectively improves the well completion validity, shortens the well completion construction period, reduces the construction risk and the well completion cost, and has just started to research on the technology in China at present.
The self-expansion sieve tube is formed by compressing a thick-wall composite material pipe with a self-expansion function to a specific thickness, and then assembling the thick-wall composite material pipe with a perforated base tube and a filter layer to cover the outer side of the sieve tube. Therefore, how to compress and form the composite material pipe is a problem to be solved in the field.
Disclosure of Invention
Features and advantages of the invention will be set forth in part in the description which follows, or may be obvious from the description, or may be learned by practice of the invention.
In order to overcome the problems of the prior art, the invention provides a composite material pipe compression molding device, which comprises:
the outer diameter of the fixed shaft is matched with the inner diameter of the pipe to be compressed;
the base is provided with a fixed groove matched with the end part of the fixed shaft and clamping grooves radially arranged around the fixed groove;
compression design sleeve comprises a plurality of sleeve lamella, the tip of sleeve lamella with the draw-in groove phase-match. More specifically, the width of the tip of sleeve lamella is unanimous with the width of draw-in groove, when compression design sleeve received pressure, the sleeve lamella can be followed the draw-in groove to the fixed axle direction removes.
In one embodiment of the invention, the device further comprises a cover plate connected to the end of the fixed shaft, and the diameter of the cover plate is larger than that of the fixed shaft.
In one embodiment of the invention, the card slot is comprised of a plurality of card slot segments of different widths.
In one embodiment of the present invention, the card slot includes n sub-card slots with different lengths or widths, and the starting points of the sub-card slots with the same length or width are located on the same circumference.
In one embodiment of the invention, the edge of the inner wall of one side of the sleeve flap is provided with a thin sheet.
In one embodiment of the invention, the upper outer walls of the sleeve petals are tapered.
In one embodiment of the invention, the cross-section of the sleeve petals is fan-shaped, and the inner wall of the sleeve petals is in contact with the outer wall of the pipe to be compressed.
In one embodiment of the invention, the number of the sleeve petals is less than or equal to the number of the slots.
In one embodiment of the present invention, the fixing groove is a circular groove or an annular groove.
In one embodiment of the invention, the device further comprises a pressurizing head which is composed of an upper pressurizing ring, a lower pressurizing ring and a connecting column for connecting the upper pressurizing ring and the lower pressurizing ring.
The invention also provides a composite material pipe compression molding method by adopting the composite material pipe compression molding device provided by any embodiment of the invention, which comprises the following steps:
fixing the fixed shaft on the base;
placing the end parts of sleeve petals of a compression shaping sleeve in a clamping groove of the base, so that a compression molding cavity is formed between the compression shaping sleeve and the fixed shaft;
placing a composite pipe to be compressed in the compression molding cavity;
and applying pressure to the compression molding sleeve to enable the sleeve petals to move towards the direction of the fixed shaft along the clamping groove.
The invention provides a composite material pipe compression molding device and a method, the device has simple structure, can efficiently and uniformly compress a composite material pipe with original thickness to the required wall thickness and ensure that the inner diameter and the length of the pipe are not changed, and the processed and molded composite material pipe not only meets the requirements in size, but also reaches the standards in appearance and performance, so that a self-expansion screen pipe meets the well descending requirements, a foundation is provided for the application of the self-expansion screen pipe completion technology, and the efficient development of an oil-gas reservoir is realized.
The features and content of these solutions will be better understood by those skilled in the art from reading the present description.
Drawings
The advantages and realisation of the invention will be more apparent from the following detailed description, given by way of example, with reference to the accompanying drawings, which are given for the purpose of illustration only, and which are not to be construed in any way as limiting the invention, and in which:
FIG. 1 is a schematic view of a composite material pipe compression molding apparatus according to an embodiment of the present invention at the beginning of compression;
FIG. 2 is a schematic view of the composite material pipe compression molding apparatus shown in FIG. 1 after compression molding;
FIG. 3 is a schematic structural view of a fixed shaft in the composite material pipe compression molding device shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a cover plate in the composite material pipe compression molding device shown in FIG. 1;
FIG. 5 is a schematic view of a compression setting sleeve of the composite material pipe compression molding apparatus shown in FIG. 1;
FIG. 6 is a schematic view of the configuration of the sleeve petals in the compression sizing sleeve of FIG. 5;
FIG. 7 is a schematic view of a pressing head of the composite material pipe compression molding apparatus shown in FIG. 1;
FIG. 8 is a schematic structural view of a base plate in the composite material pipe compression molding apparatus shown in FIG. 1;
FIG. 9 is a top view of a base plate according to another embodiment of the present invention;
fig. 10 is a top view of a base plate according to another embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, the present invention provides a composite material pipe compression molding apparatus, including: base 10, fixed axle 20, compression setting sleeve 30. Wherein:
the outer diameter of the fixed shaft 20 is matched with the inner diameter of the pipe to be compressed, so that the inner diameter and the inner side shape of the composite material pipe can be kept unchanged under the condition of strong extrusion in the compression process. The base 10 is provided with a fixing groove 11 for matching with an end of the fixing shaft 20 and locking grooves 12 radially arranged around the fixing groove 11. In practical implementation, the first end of the fixing shaft 20 is placed in the fixing groove 11, and the fixing of the fixing shaft to the base 10 is completed. A compression molding cavity is formed between the compression molding sleeve 30 and the fixed shaft 20, and the compression molding sleeve 30 is composed of a plurality of sleeve petals 31; the ends of the sleeve flaps 31 mate with the slots 12. More specifically, the width of the end of the sleeve flap 31 is the same as the width of the slot, and when the compression setting sleeve is pressed, the sleeve flap 31 can move along the slot 12 towards the direction of the fixed shaft 20. Generally, the cross section of the sleeve flap 31 is fan-shaped, the slot 12 may be long, and the end of the sleeve flap 31 may be transversely placed in the slot 12.
In order to prevent the longitudinal deformation of the tube during the compression process, which causes the length of the tube to change, a cover plate 50 is further included, which is attached to the end of the stationary shaft 20, the diameter of the cover plate 50 being greater than the diameter of the stationary shaft 20. In this embodiment, as shown in fig. 4, the cover plate 50 is circular and is connected to the upper end of the fixing shaft by a screw, and the diameter of the cover plate 50 may be the same as the outer diameter of the composite material pipe after compression molding. The cover plate 50 may further be provided with a boss 51 matching with the upper port of the fixing shaft, and the boss 51 may extend into the inner cavity of the fixing shaft. It should be noted that the fixed shaft 20 may be solid or tubular, and if solid, its upper end may be provided with a groove matching with the boss 51.
Referring to fig. 5 and fig. 6, the number of the sleeve petals 31 in the compression-molding sleeve 30 is related to the diameter of the composite material pipe to be compressed and the required compression amount, and generally ranges from 4 to 180 petals. The inner wall of the sleeve petals 31 is in contact with the outer wall of the tubing to be compressed. The pipe to be compressed is placed in a compression setting cavity formed by the fixed shaft 20 and the compression setting sleeve 30, the outer diameter of the molding cavity is the outer diameter of the composite pipe before compression initially, a certain gap exists between the sleeve petals 31, a pressing device such as a press is used for applying pressure to the outer wall of the sleeve, the sleeve petals are gradually folded, the pipe is compressed along with the sleeve petals, and after the sleeve petals 31 are completely folded without gaps, the inner diameter of the molding cavity is the final outer diameter required by the pipe, and the pipe is compressed in place.
For extruding from lamella space during preventing to compress tubular product, the sleeve is to the wrappage nature of combined material tubular product during the assurance compression, guarantees the smoothness of combined material tubular product outer wall behind the compression moulding, in this embodiment, as shown in fig. 4, the inner wall edge of one side of sleeve lamella is equipped with thin slice 63. The thin slice can be set up on sleeve lamella 31 through modes such as welding, and the length of thin slice 63 is the same with sleeve lamella 31, and its width exceeds sleeve lamella and before compressing tubular product, wraps up the maximum clearance of tubular product.
The upper portion outer wall of sleeve lamella 31 has certain tapering (1 ~ 89 degrees), and the tapering can be adjusted according to the difference of tubular product diameter and required wall thickness. The outer wall of the upper part of the compression shaping sleeve 30 consisting of the sleeve flaps 31 is conical, and the lower part is cylindrical. In this embodiment, a pressing head 40 is further included, and referring to fig. 1, fig. 2 and fig. 7, the pressing head 40 is composed of an upper pressing ring 41, a lower pressing ring 42 and a connecting column 43 for connecting the upper pressing ring 41 and the lower pressing ring 42. The upper press ring 41 receives the upper pressure and is conducted to the lower press ring 42 by the intermediate connecting cylinder. The lower pressurizing ring 42 gradually moves from the conical small-diameter part of the compression shaping sleeve to the cylindrical bottom in the pressurizing process, so that the petals of the compression shaping sleeve gradually change from a divergent state to a closed state, the axial pressure is converted into radial pressure, the molding cavity shrinks, and the composite material pipe is compressed and shaped. The upper pressure ring is also provided with handrails 44 to facilitate installation and withdrawal.
In an embodiment of the present invention, the inner diameters of the upper and lower pressure rings 41, 42 are the same, the minimum outer diameter of the tapered portion of the upper part of the compression setting sleeve 30 is smaller than the inner diameters of the pressure rings of the upper and lower pressure rings 41, 42, and the outer diameter of the cylindrical portion of the lower part of the compression setting sleeve 30 is the same as the inner diameters of the upper and lower pressure rings 41, 42, which may have a certain tolerance. In another embodiment of the present invention, the inner diameters of the upper and lower pressing rings 41 and 42 are different, the inner diameter of the upper pressing ring 41 is the same as the minimum outer diameter of the tapered portion of the upper portion of the compression setting sleeve 30, and the inner diameter of the lower pressing ring 42 is the same as the inner diameter of the cylindrical portion of the lower portion of the compression setting sleeve 30.
Referring to fig. 1, 2 and 8, the base 10 is used for placing the compression-molding sleeve 30, the pipe to be compressed and the fixing shaft 20. Radial clamping grooves 12 are formed in the base 10 and used for placing sleeve petals to achieve positioning and guiding effects. In this embodiment, the number of the slots 12 corresponds to the number of the sleeve petals 31, and the circumferential dimension of the initial position of the slot 12 is the original dimension of the outer diameter of the composite material pipe before compression. The center of the base 10 is further provided with a fixing groove 11 for placing the fixing shaft 20, in this embodiment, the fixing groove 11 is a circular groove; annular step 13 has still been processed to circular recess outside, and the external diameter of annular step 13 is the external diameter size after the compression design of combined material tubular product, and at this moment, the outward flange of annular step 13 can play limiting displacement, and the compression design sleeve removes the outward flange of step 13 and just no longer compresses. Although not shown in the drawings, the circular groove 11 may be replaced with an annular groove. In addition, in order to adapt to pipes to be compressed with different inner diameters, a circular groove and an annular groove can be arranged at the same time, the diameter of the circular groove is smaller than the inner diameter of the annular groove, and the circular groove and the annular groove are coaxially arranged.
Referring to fig. 9, in another embodiment of the present invention, the fixing groove 71 on the base 70 is an annular groove, and at this time, the fixing shaft may be tubular, and the thickness of the fixing shaft matches the annular groove; if the fixed shaft is of a solid structure, the bottom end of the fixed shaft can be provided with an annular bulge matched with the annular groove. The card slot 72 on the base 70 is composed of a plurality of card slot segments of different widths, generally, the width of the card slot segment closer to the fixing groove 71 is smaller. At the moment, the pipe to be compressed with different thicknesses can be better adapted under the condition that the base is not replaced.
Referring to fig. 10, in another embodiment of the present invention, the fixing groove 81 on the base 80 is an annular groove, and at this time, the fixing shaft may be tubular, and the thickness of the fixing shaft matches with the annular groove; if the fixed shaft is of a solid structure, the bottom end of the fixed shaft can be provided with an annular bulge matched with the annular groove. The card slots on the base 80 include n sub-card slots 83 and 85 with different lengths or widths, the starting points of the sub-card slots with the same length or width are located on the same circumference, in this embodiment, the sub-card slot 83 is smaller than the width of the sub-card slot 85, and at this time, the radius of the circumference corresponding to the starting position of the sub-card slot 83 is smaller than the radius of the circumference corresponding to the starting position of the sub-card slot 85. At this time, the widths of the sleeve lobes corresponding to the daughter card slots 83 and 85 are also different, and the number of the sleeve lobes may be smaller than the number of the card slots. It should be noted that the daughter card slots with starting positions on different circumferences may also have the same width. At the moment, the pipe to be compressed with different thicknesses can be better adapted under the condition that the base is not replaced.
The invention also provides a composite material pipe compression molding method which can be carried out by adopting the composite material pipe compression molding device provided by any embodiment of the invention, and the method specifically comprises the following steps:
s1, fixing the fixed shaft on the base;
the fixing in step S1 mainly means that the fixing shaft and the base are fixed in position, and need not be fixedly connected, and of course, the implementation of the present invention is not affected by fixedly connecting the fixing shaft and the base together.
S2, placing the end parts of the sleeve petals of the compression shaping sleeve in the clamping grooves of the base, and forming a compression shaping cavity between the compression shaping sleeve and the fixing shaft;
s3, placing the composite material pipe to be compressed in the compression molding cavity;
and S4, applying pressure to the compression molding sleeve to enable the sleeve petals to move towards the direction of the fixed shaft along the clamping groove.
In specific implementation, the pressure can be applied by a press and a pressing head as shown in fig. 7, the pressing head moves downwards from the upper end of the compression shaping sleeve to gradually contract the compression shaping sleeve, so that the compression cavity becomes smaller, the composite material pipe is compressed, and when the pressing head runs to the bottom of the sleeve, the pipe is compressed in place.
The composite material pipe compression molding device and the method provided by the invention can uniformly compress the pipe to be molded to the required wall thickness and ensure that the inner diameter and the length of the pipe are not changed, and the size of the processed and molded composite material pipe meets the requirements and the appearance and the performance of the pipe meet the standards. The composite material pipe compression molding device has the advantages of simple structure, safety, reliability, economy, high efficiency and simple and convenient operation, and is not only suitable for compression molding of the composite material pipe in the self-expansion sieve tube, but also suitable for compression molding of any other compressible pipe.
While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, those skilled in the art will appreciate that various modifications can be made to the present invention without departing from the scope and spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined in the appended claims.

Claims (9)

1. A composite material pipe compression molding device is characterized by comprising:
the outer diameter of the fixed shaft is matched with the inner diameter of the pipe to be compressed;
the base is provided with a fixed groove matched with the end part of the fixed shaft and clamping grooves radially arranged around the fixed groove;
the compression shaping sleeve consists of a plurality of sleeve petals, and the end parts of the sleeve petals are matched with the clamping grooves; a compression molding cavity is formed between the compression molding sleeve and the fixed shaft, and the pipe to be compressed is placed in the compression molding cavity;
the cross section of the sleeve petal is fan-shaped, and the inner wall of the sleeve petal is contacted with the outer wall of the pipe to be compressed.
2. The composite material pipe compression molding apparatus of claim 1, further comprising a cover plate attached to an end of the stationary shaft, the cover plate having a diameter larger than a diameter of the stationary shaft.
3. The composite material pipe compression molding apparatus as claimed in claim 1, wherein said neck is comprised of a plurality of neck segments of different widths.
4. The composite material pipe compression molding device according to claim 1, wherein the clamping grooves comprise n types of sub-clamping grooves with different lengths or widths, and the starting points of the sub-clamping grooves with the same length or width are located on the same circumference.
5. The composite material pipe compression molding device according to claim 1, wherein the inner wall edge of one side of the sleeve flap is provided with a thin sheet.
6. The composite tubing compression molding apparatus of claim 1, wherein the upper outer walls of the sleeve lobes are tapered.
7. The composite tubing compression molding apparatus of claim 1, wherein the number of the sleeve lobes is less than or equal to the number of the slots.
8. The composite material pipe compression molding device according to claim 1, further comprising a pressurizing head, which is composed of an upper pressurizing ring, a lower pressurizing ring and a connecting column for connecting the upper pressurizing ring and the lower pressurizing ring.
9. A composite material pipe compression molding method using the composite material pipe compression molding apparatus according to any one of claims 1 to 8, comprising:
fixing the fixed shaft on the base;
placing the end parts of sleeve petals of a compression shaping sleeve in a clamping groove of the base, so that a compression molding cavity is formed between the compression shaping sleeve and the fixed shaft;
placing a composite pipe to be compressed in the compression molding cavity;
and applying pressure to the compression molding sleeve to enable the sleeve petals to move towards the direction of the fixed shaft along the clamping groove.
CN201810674757.7A 2018-06-27 2018-06-27 Composite material pipe compression molding device and method Active CN110640017B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810674757.7A CN110640017B (en) 2018-06-27 2018-06-27 Composite material pipe compression molding device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810674757.7A CN110640017B (en) 2018-06-27 2018-06-27 Composite material pipe compression molding device and method

Publications (2)

Publication Number Publication Date
CN110640017A CN110640017A (en) 2020-01-03
CN110640017B true CN110640017B (en) 2021-06-22

Family

ID=68988818

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810674757.7A Active CN110640017B (en) 2018-06-27 2018-06-27 Composite material pipe compression molding device and method

Country Status (1)

Country Link
CN (1) CN110640017B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116001166A (en) * 2023-03-16 2023-04-25 泓欣科创(北京)科技有限公司 Automatic forming device and forming method for threaded pipe

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201389572Y (en) * 2009-05-05 2010-01-27 钱宗富 Pipe cold extrusion reducing device
CN203044671U (en) * 2013-01-14 2013-07-10 苏州宝成汽车冲压有限公司 Pipe fitting local hole shrinkage stamping die

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US7735714B2 (en) * 2005-05-18 2010-06-15 Midgett Steven G Composite metal tube and ring and a process for producing a composite metal tube and ring
US8127447B2 (en) * 2008-11-19 2012-03-06 Baker Hughes Incorporated Method for downhole screen manufacturing
CN104511537B (en) * 2014-11-14 2016-08-31 镇江利奥排气技术有限公司 A kind of eight lobe waist contracting moulds
CN106424395B (en) * 2016-05-28 2018-07-27 镇江市恒源汽车零部件有限公司 A kind of scalable mouth processing mold of pipe fitting
CN207131367U (en) * 2017-07-07 2018-03-23 中石化石油工程技术服务有限公司 A kind of casing annulus packer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201389572Y (en) * 2009-05-05 2010-01-27 钱宗富 Pipe cold extrusion reducing device
CN203044671U (en) * 2013-01-14 2013-07-10 苏州宝成汽车冲压有限公司 Pipe fitting local hole shrinkage stamping die

Also Published As

Publication number Publication date
CN110640017A (en) 2020-01-03

Similar Documents

Publication Publication Date Title
JPH0215298B2 (en)
CN110640017B (en) Composite material pipe compression molding device and method
CN105081096A (en) Pipe end contraction machining die
CN102319783A (en) Heat-push bending method for producing pipe fittings with equal diameters and equal wall thicknesses
CN107453564B (en) Shaping tool and shaping method for stator core
CN107186100B (en) Pipe rotary groove preforming method and pipe
CN106734819B (en) A kind of processing mold and its method of multisection type helical tooth
CN208680332U (en) A kind of thin walled aperture cylindrical component flaring sizing die
CA1148795A (en) Method of producing a corrugated, multi-ply metal bellows
JP2004291072A (en) Working method of end of piping, and manufacturing method of piping joint with flange
CN103335018A (en) Inner-ring small-flange separation type conical roller bearing and assembling method thereof
CN109443107B (en) Self-sealing bottom paper tube with lead wire and manufacturing method thereof
CN102356245B (en) Screw element, screw connection and method for producing screw element
CN105499417A (en) Necking device for metal pipe ends
US6305266B1 (en) Piston or plunger and a method for making the same
CN103097074B (en) In workpiece, load the method for screw shell and be connected structure
CN211915990U (en) Rubber joint's overcoat extrusion die
CN101934326B (en) Method for manufacturing automobile wheel spokes by utilizing steel tubes
CN2156961Y (en) Rounding type expanding mould
US4435894A (en) Ductile cast iron pipe having constricted end casing
CN204108864U (en) A kind of press-moulding die of emery wheel joint block
CN110253481B (en) Shrinkage assembly method and device for spherical capsule
CN208427001U (en) A kind of pressing structure of dry granulating machine
CN204934352U (en) Pipe end shrink mouth processing mold
CN217941487U (en) Guiding core rod for pressing wave of corrugated pipe and pressing wave tool

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant