CN105537306A - Method and pipe blank for reducing metal tearing area at tail end of extruded pipe - Google Patents
Method and pipe blank for reducing metal tearing area at tail end of extruded pipe Download PDFInfo
- Publication number
- CN105537306A CN105537306A CN201510984608.7A CN201510984608A CN105537306A CN 105537306 A CN105537306 A CN 105537306A CN 201510984608 A CN201510984608 A CN 201510984608A CN 105537306 A CN105537306 A CN 105537306A
- Authority
- CN
- China
- Prior art keywords
- pipe
- pusher
- chamfering
- internal diameter
- tear zone
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/08—Making wire, bars, tubes
- B21C23/085—Making tubes
-
- 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
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention provides a method and pipe blank for reducing the metal tearing area at the tail end of an extruded pipe and belongs to the field of pipeline machining processes. The method includes at least two process steps of generating an extrusion effect on the inner diameter part and/or the outer diameter part of the pipe blank, the directions of extrusion faces acting on the pipe blank in the at least two process steps of generating the extrusion effect on the inner diameter part and/or the outer diameter part of the pipe blank are reversed successively, and therefore shearing pushing portions generated by the pipe blank are reversed successively. The method and pipe blank for reducing the metal tearing area at the tail end of the extruded pipe have the advantages that implementation is simple and the metal tearing area of a metal pipe body is effectively reduced.
Description
Technical field
The invention belongs to pipeline processing technology field, particularly relate to a kind of method and the pipe thereof that reduce extrude tubes end metal tear zone.
Background technology
Hot extrusion technique is the main mode of production of one of high-alloy seamless steel pipe.In extrusion process, blank is in three-dimensional compressive stress state, and dependent variable is large, and its plasticity can be not fully exerted, and blank machinability is strong.Meanwhile, have that equipment is simple, technique is flexible.Therefore, extrusion produces difficult distortion high-alloy steel pipe is that countries in the world extensively adopt.
But first difficult distortion high alloy tubing extrusion process will have a reaming procedure, in reaming ending phase, owing to producing shearing motion between hole expansion die and metal stock, easily produces metal tears district at pipe end, form micro-flaw source.Because extrusion deformation degree is large, lengthening coefficient, usually more than 3.0, even reaches more than 10.0 sometimes.Therefore, pipe end is once form fine cracks source, and in subsequent extrusion process, by the macroscopic cracking that Formation Depth and length are doubled, as shown in Figure 2, length can reach more than 200mm sometimes.The formation of extrude tubes surface cracks, cause table in steel pipe goods discontinuous, resection is large, affects goods microstructure and property, reduces lumber recovery simultaneously.
Summary of the invention
The invention provides a kind of method and the pipe thereof that reduce extrude tubes end metal tear zone for the deficiencies in the prior art part, the feature that next stage can be utilized to make metal stock produce the technique of shearing motion itself goes the scope reducing the tear zone produced in the technique of the identical type of upper level.
Technical scheme of the present invention is to provide a kind of method and the pipe thereof that reduce extrude tubes end metal tear zone, comprise at least two to the internal diameter of pipe and or external diameter produce the processing step of squeezing action, the internal diameter to pipe described at least two and or external diameter are produced in the processing step of squeezing action successively reverse to the compressive plane direction of described pipe effect, the shearing pusher portion that described pipe is produced is successively contrary.
This embodiment of the present invention processes producing the pipe tail end shearing pusher portion in first time technique as head end in second time technique, the shearing pusher portion shearing pusher portion that produces in first time technique being corrected in second time technique simultaneously make second time technique produce can not be overlapping with the shearing pusher portion produced in first time technique, in fact think in traditional handicraft that first time technique produces and shears the pipe tail end in pusher portion and appoint and so only just superposed in the shearing pusher portion that twice technique produces as during tail end in second time technique, so pusher portions are sheared in dispersion just simple oppositely two, but in fact carry out adding man-hour as head end in second time technique when producing the pipe tail end shearing pusher portion in one-time process, the shearing pusher portion produced in technique is for the first time extruded and regenerates reverse shearing motion in second time technique, the shearing pusher portion produced in first time technique is repaired, simultaneously due in second time technique without the shearing pusher portion produced in stacking first time technique, the mobility of the material of the squeezed pressure side of pipe is strengthened, the final shearing pusher portion produced is made to be far smaller than the final shearing pusher portion produced in traditional handicraft.
As preferably of the present invention, the described internal diameter to pipe and or external diameter produce the processing step of squeezing action and comprise and the chambering process of reaming is carried out to the internal diameter of described pipe and the external diameter of described pipe is carried out the extrusion process that extrolling is stretched into pipe fitting.
In the present invention, chambering process is the extruding aperture surface of pipe being carried out to expanding, and extrusion stretching is extruding external diameter being carried out to compression, the vertical direction of the extruding of two techniques is contrary simultaneously also contrary by their horizontal direction in the method for the invention, so just can revise the shearing pusher portion produced during reaming when extrusion stretching, the shearing pusher portion produced when simultaneously reducing extrusion stretching.
As preferably of the present invention, described shearing pusher portion comprises reaming windrow portion and extruding windrow portion.
As preferably of the present invention, comprise the steps
Step one, determines feed end and the pusher end of pipe;
Step 2, pushes hole expansion die from described pusher end, makes described reaming windrow portion result from described feed end while the internal diameter of described pipe is expanded;
Step 3, thrust unit is arranged at described pusher end, described feed end extrudes to extrusion die by described thrust unit, makes described extruding windrow portion result from described pusher end while making described pipe extend into pipe fitting.
As preferably of the present invention, the center of described pipe is provided with central through hole, and the port that described central through hole is positioned at one end of described pusher end is provided with the first chamfering, and the port, outside that described pipe is positioned at described feed end one end is provided with the second chamfering.
As preferably of the present invention, the first described chamfering coordinates with hole expansion die, and the second described chamfering coordinates with extrusion die.
The present invention has following beneficial effect:
It is simple that the present invention has enforcement, and effectively reduce the advantage in the metal tears district of metal tube.
Accompanying drawing explanation
Fig. 1 is the pipe structural representation of the embodiment of the present invention;
Fig. 2 is the shearing pusher portion structural representation of the embodiment of the present invention;
Fig. 3 is the hole expansion die structural representation of the embodiment of the present invention;
Fig. 4 is the structure of extrusion schematic diagram of the embodiment of the present invention;
In figure, 1-pipe; 2-shears pusher portion; 3-extrusion die; 4-thrust unit; 5-hole expansion die; 101-feed end; 102-pusher end; 103-first chamfering; 104-second chamfering; 2a-reaming windrow portion; 2b-extrudes windrow portion.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment of the method for the present invention comprise at least two to the internal diameter of pipe 1 and or external diameter produce the processing step of squeezing action, at least two internal diameters to pipe 1 and or external diameter are produced the compressive plane direction acted on pipe 1 in the processing step of squeezing action successively reverse, the shearing pusher portion 2 that pipe 1 is produced is successively contrary.Wherein to the internal diameter of pipe 1 and or the external diameter processing step that produces squeezing action comprise and the chambering process of reaming carried out to the internal diameter of pipe 1 and the external diameter of pipe 1 is carried out the extrusion process that extrolling is stretched into pipe fitting.As shown in Figure 2, mentioned in embodiment of the method for the present invention shearing pusher portion 2 comprises reaming windrow portion 2a and extruding windrow portion 2b.
Embodiment of the method for the present invention comprises the steps
Step one, as shown in Figure 1, determines feed end 101 and the pusher end 102 of pipe 1;
Step 2, as shown in Figure 3, pushes hole expansion die 5 from pusher end 102, and make reaming windrow portion 2a result from feed end 101 while the internal diameter of pipe 1 is expanded, wherein the end of the reamer of hole expansion die 5 is conical head;
Step 3, as shown in Figure 4, thrust unit 4 is arranged at pusher end 102, feed end 101 extrudes to extrusion die 3 by thrust unit 4, makes extruding windrow portion 2b result from pusher end 102 while making pipe 1 extend into pipe fitting.
Because extruding front end deformation extent is little, metal flow rates is slow, is not easy to produce metal non-continuous event, and surface cracks phenomenon reduces greatly.The present invention not only can improve extrude tubes crack defects of inner surface, improves extrude tubes quality, greatly can improve the lumber recovery of extrude tubes simultaneously.
As shown in Figure 1, in the embodiment of pipe of the present invention, the center of pipe 1 is provided with central through hole, the port that central through hole is positioned at one end of pusher end 102 is provided with the first chamfering 103, the port, outside that pipe 1 is positioned at feed end 101 one end is provided with the angle of the second chamfering 104, first chamfering 103 and the second chamfering 104 according to the concrete size adjusting of equipment.Wherein the first chamfering 103 coordinates with hole expansion die 5, and the second chamfering 104 coordinates with extrusion die 3.
Embodiment recited above is only be described the preferred embodiment of the present invention, not limits the spirit and scope of the present invention.Under the prerequisite not departing from design concept of the present invention; the various modification that this area ordinary person makes technical scheme of the present invention and improvement; all should drop into protection scope of the present invention, the technology contents of request protection of the present invention, all records in detail in the claims.
Claims (6)
1. one kind reduces the method for extrude tubes end metal tear zone, comprise at least two to the internal diameter of pipe (1) and or external diameter produce the processing step of squeezing action, it is characterized in that: it is successively reverse the internal diameter to pipe (1) described at least two and or external diameter to be produced the compressive plane direction acted on described pipe (1) in the processing step of squeezing action, and the shearing pusher portion (2) that described pipe (1) is produced is successively contrary.
2. a kind of method reducing extrude tubes end metal tear zone according to claim 1, is characterized in that: the described internal diameter to pipe (1) and or external diameter produce the processing step of squeezing action and comprise and the chambering process of reaming is carried out to the internal diameter of described pipe (1) and the external diameter of described pipe (1) is carried out the extrusion process that extrolling is stretched into pipe fitting.
3. a kind of method reducing extrude tubes end metal tear zone according to claim 2, is characterized in that: described shearing pusher portion (2) comprises reaming windrow portion (2a) and extruding windrow portion (2b).
4. a kind of method reducing extrude tubes end metal tear zone according to claim 3, is characterized in that: comprise the steps
Step one, determines feed end (101) and the pusher end (102) of pipe (1);
Step 2, pushes hole expansion die (5) from described pusher end (102), makes described reaming windrow portion (2a) result from described feed end (101) while the internal diameter of described pipe (1) is expanded;
Step 3, thrust unit (4) is arranged at described pusher end (102), described feed end (101) extrudes to extrusion die (3) by described thrust unit (4), makes described extruding windrow portion (2b) result from described pusher end (102) while making described pipe (1) extend into pipe fitting.
5. a kind of pipe (1) reducing extrude tubes end metal tear zone according to claim 4, it is characterized in that: the center of described pipe (1) is provided with central through hole, the port that described central through hole is positioned at one end of described pusher end (102) is provided with the first chamfering (103), and the port, outside that described pipe (1) is positioned at described feed end (101) one end is provided with the second chamfering (104).
6. a kind of pipe (1) reducing extrude tubes end metal tear zone according to claim 5, it is characterized in that: described the first chamfering (103) coordinates with hole expansion die (5), described the second chamfering (104) coordinates with extrusion die (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984608.7A CN105537306A (en) | 2015-12-25 | 2015-12-25 | Method and pipe blank for reducing metal tearing area at tail end of extruded pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510984608.7A CN105537306A (en) | 2015-12-25 | 2015-12-25 | Method and pipe blank for reducing metal tearing area at tail end of extruded pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105537306A true CN105537306A (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510984608.7A Pending CN105537306A (en) | 2015-12-25 | 2015-12-25 | Method and pipe blank for reducing metal tearing area at tail end of extruded pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105537306A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237405A (en) * | 2018-03-02 | 2018-07-03 | 湄洲湾职业技术学院 | Lead sinker production equipment |
| CN113182373A (en) * | 2021-05-18 | 2021-07-30 | 山西太钢不锈钢股份有限公司 | Extrusion method of nickel-based alloy seamless steel pipe |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861913A (en) * | 1981-10-09 | 1983-04-13 | Nippon Steel Corp | Manufacture of hot extrusion alloy material |
| JPH0191910A (en) * | 1987-10-02 | 1989-04-11 | Sumitomo Metal Ind Ltd | Pipe manufacturing method for hot extrusion |
| WO1999051370A1 (en) * | 1998-03-20 | 1999-10-14 | International Extruded Products, Llp | Clad tubular product and method of manufacturing same |
| CN103920743A (en) * | 2014-04-18 | 2014-07-16 | 新兴铸管股份有限公司 | Production method of difficultly-deforming alloy composite double-layer tubular product |
| CN204429880U (en) * | 2015-01-09 | 2015-07-01 | 江苏佳汇光电科技有限公司 | Cable seamless aluminium tubing extrusion die |
| CN104826890A (en) * | 2015-05-09 | 2015-08-12 | 山西太钢不锈钢股份有限公司 | Manufacturing method of super austenitic stainless steel seamless tube |
-
2015
- 2015-12-25 CN CN201510984608.7A patent/CN105537306A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5861913A (en) * | 1981-10-09 | 1983-04-13 | Nippon Steel Corp | Manufacture of hot extrusion alloy material |
| JPH0191910A (en) * | 1987-10-02 | 1989-04-11 | Sumitomo Metal Ind Ltd | Pipe manufacturing method for hot extrusion |
| WO1999051370A1 (en) * | 1998-03-20 | 1999-10-14 | International Extruded Products, Llp | Clad tubular product and method of manufacturing same |
| CN103920743A (en) * | 2014-04-18 | 2014-07-16 | 新兴铸管股份有限公司 | Production method of difficultly-deforming alloy composite double-layer tubular product |
| CN204429880U (en) * | 2015-01-09 | 2015-07-01 | 江苏佳汇光电科技有限公司 | Cable seamless aluminium tubing extrusion die |
| CN104826890A (en) * | 2015-05-09 | 2015-08-12 | 山西太钢不锈钢股份有限公司 | Manufacturing method of super austenitic stainless steel seamless tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237405A (en) * | 2018-03-02 | 2018-07-03 | 湄洲湾职业技术学院 | Lead sinker production equipment |
| CN108237405B (en) * | 2018-03-02 | 2023-09-12 | 湄洲湾职业技术学院 | Production equipment for lead-made sinker |
| CN113182373A (en) * | 2021-05-18 | 2021-07-30 | 山西太钢不锈钢股份有限公司 | Extrusion method of nickel-based alloy seamless steel pipe |
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| PB01 | Publication | ||
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Application publication date: 20160504 |