CN108380680A - A kind of cold drawing die having dust blowing function - Google Patents
A kind of cold drawing die having dust blowing function Download PDFInfo
- Publication number
- CN108380680A CN108380680A CN201810211369.5A CN201810211369A CN108380680A CN 108380680 A CN108380680 A CN 108380680A CN 201810211369 A CN201810211369 A CN 201810211369A CN 108380680 A CN108380680 A CN 108380680A
- Authority
- CN
- China
- Prior art keywords
- external mold
- internal model
- cylinder barrel
- scraping ring
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 title claims abstract description 38
- 238000007664 blowing Methods 0.000 title claims abstract description 19
- 238000010622 cold drawing Methods 0.000 title claims abstract description 18
- 238000007790 scraping Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims description 15
- 238000004513 sizing Methods 0.000 claims description 11
- 238000005516 engineering process Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 239000003818 cinder Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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
- B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
- B21C3/02—Dies; Selection of material therefor; Cleaning thereof
-
- 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
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The present invention relates to a kind of cold drawing dies having dust blowing function, it is characterized in that it includes core bar, external mold dust scraping ring, internal model dust scraping ring, external mold and internal model；Internal model is relied on and is threadedly secured on core bar；Internal model is located in the endoporus of external mold, and internal model is overlapped with the center of external mold；External mold inner wall is equipped with an internal channel, and an external mold dust scraping ring is equipped in internal channel；It is equipped with an outer channel on the outer surface of internal model on rear side of external mold dust scraping ring, an internal model dust scraping ring is installed in outer channel；It is cylinder barrel cold-drawn processing district between external mold and internal model.The present invention has the remnant that can strike off cylinder barrel surface in advance before cylinder barrel drawing deformation, effectively prevents the grit in remnant and pulls cylinder barrel and die surface, the advantages of capable of improving the surface quality of cylinder barrel and extend the service life of mold.
Description
Technical field
The present invention relates to a kind of cold drawing dies, and in particular to a kind of Barrel of Hydraulic Cylinders cold-drawn mould with dust blowing function
Tool.
Background technology
In recent years, with the extensive use of hard-drawn technique, the cylinder barrel of hydraulic cylinder also generally uses the technique of cold-drawn to be made.
Blank first passes through the pretreatment procedures such as pickling, phosphatization and saponification, and processing then is formed to cylinder barrel using cold-drawing technology again.It is cold
During pulling out, the plastic deformation of the inside and outside mould constraint material on drawbench forms the inside and outside round table of high-precision cold drawing steel tube
Face.Cold-drawn processing technology not only has the characteristics that high in machining efficiency, stock utilization is high, and machined material also has machinery
Performance is good, the advantage that dimensional accuracy is high, surface roughness is low.
But cold-drawing technology also has its shortcoming, is exactly steel pipe in Cold Drawing Process, surfaces externally and internally is easy to form axis
To drawing trace.If the axial drawing trace on cylinder barrel is not thorough, removing is clean, and hydraulic cylinder is in use, and stress collection can be formed at trace by drawing
In.Stress concentration eventually results in cylinder barrel surface and cracks, to cause the fracture failure of hydraulic cylinder.
If cold-drawn is not thorough with blank pickling, rushes and does not wash clean, steel tube inner hole can leave anvil cinder, phosphatization slag and saponification powder
Equal remnants.In Cold Drawing Process, remnant is brought between inside and outside mold and workpiece, and the grit in remnant can cause cylinder
Cylinder surface occurs drawing trace.Grit in remnant simultaneously can also plucking die surface, the smoothness on mold damage surface.It is impaired
If mold be continuing with, can also pull cylinder barrel surface.So how to avoid cylinder barrel surface from generating draws trace, it is Cold Drawing Process
The middle key point for needing priority control.
Currently, in published data there are no introduce how to avoid in Cold Drawing Process generating the axial invention for drawing trace or
Document.Traditional processing method is：For the drawing trace of cylinder barrel outer circle, the method that polishing may be used is removed；For cylinder barrel
The drawing trace of endoporus, still not no good treating method, can only first carry out following process at present.In if following process can completely eliminate
Trace is drawn in hole, then cylinder barrel can be continuing with, if following process can not completely eliminate drawing trace, whole cylinder barrel will be scrapped.
Invention content
For disadvantage mentioned above, the purpose of the present invention is to provide a kind of cold drawing dies having dust blowing function；It is in cold-drawn
Cheng Zhong first strikes off the remnant on surfaces externally and internally, then carries out deformation processing again after cylinder barrel material enters inside and outside mold；Dust blowing
Function and deformation processing are integrated into one set of die, are not only effectively prevented generating on cylinder barrel and are drawn trace, and mould structure is simple
Reliably, at low cost.
The technology contents of the present invention are a kind of cold drawing die having dust blowing function, are scraped it is characterized in that it includes core bar, external mold
Konisphere, internal model dust scraping ring, external mold and internal model；Internal model is relied on and is threadedly secured on core bar；Internal model is located in the endoporus of external mold, internal model
It is overlapped with the center of external mold；External mold inner wall is equipped with an internal channel, and an external mold dust scraping ring is equipped in internal channel；In external mold dust blowing
The outer surface for enclosing the internal model of rear side is equipped with an outer channel, and an internal model dust scraping ring is equipped in outer channel；Between external mold and internal model
For cylinder barrel cold-drawn processing district；Cylinder barrel cold-drawn processing district includes dust blowing area, diameter reducing area, wall-thickness reduction zone and sizing area successively；It is cold in cylinder barrel
During pulling out, dust blowing area is mainly used for being struck off in advance by the remnant of cold-drawn cylinder barrel surfaces externally and internally；Diameter reducing area is mainly used for reducing
The outer diameter of cylinder barrel；Wall-thickness reduction zone is mainly used for that the wall thickness of cylinder barrel is thinned；Sizing area is mainly used for the internal-and external diameter ruler of sizing cylinder barrel
It is very little.
Possessed advantage is the present invention compared with prior art：Cold-drawn mold according to the present invention, can be in cylinder
The remnant for striking off cylinder barrel surface before cylinder drawing deformation in advance, effectively prevents the grit in remnant and pulls cylinder barrel and mold
Surface, not only increases the surface quality of cylinder barrel, and extends the service life of mold.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Specific implementation mode
As shown in Figure 1, a kind of cold drawing die having dust blowing function, it is characterized in that it include core bar 1, it is external mold dust scraping ring 2, interior
Mould dust scraping ring 3, external mold 4 and internal model 5；Internal model 5 is relied on and is threadedly secured on core bar 1；Internal model 5 is located in the endoporus of external mold 4, internal model
5 overlap with the center of external mold 4；4 inner wall of external mold is equipped with an internal channel 4.1, and an external mold dust scraping ring 2 is equipped in internal channel 4.1；
It is equipped with an outer channel 5.1 on the outer surface of the internal model 5 of 2 rear side of external mold dust scraping ring, an internal model dust blowing is installed in outer channel 5.1
Circle 3；It is cylinder barrel cold-drawn processing district between external mold 4 and internal model 5；Cylinder barrel cold-drawn processing district successively include dust blowing area I, diameter reducing area II,
Wall-thickness reduction zone III and sizing area IV；In cylinder barrel Cold Drawing Process, dust blowing area I is mainly used for being struck off in advance by appearance in cold-drawn cylinder barrel 6
The remnant in face；Diameter reducing area II is mainly used for reducing the outer diameter of cylinder barrel 6；Wall-thickness reduction zone III is mainly used for that the wall of cylinder barrel 6 is thinned
It is thick；Sizing area IV is mainly used for the inside/outside diameter size of sizing cylinder barrel 6.
The operation principle of the present invention is that the present invention is fixed on by external mold 4 on the die holder of drawbench, and in Cold Drawing Process, cylinder
Cylinder 6 passes sequentially through external mold 4, the dust blowing area I that internal model 5 is formed, diameter reducing area II, subtracts wall under the pulling force effect of drawbench master cylinder
Area III and sizing area IV；When cylinder barrel 6 enters dust blowing area I, external mold dust scraping ring 2 strikes off the remnant of 6 periphery of cylinder barrel first,
Then internal model dust scraping ring 3 strikes off the remnant of 6 endoporus of cylinder barrel again；When cylinder barrel 6 enters diameter reducing area II, under the constraint of external mold 4,
The outer diameter of cylinder barrel 6 reduces；When cylinder barrel 6 enters wall-thickness reduction zone III, under the constraint of internal model 5, the wall thickness reduction of cylinder barrel 6；Work as cylinder barrel
When 6 entrance sizing area IV, under the common constraint of external mold 4 and internal model 5, the outer circle and endoporus of cylinder barrel 6 are shaped, and diameter dimension reaches
The size limited to mold；Cylinder barrel 6 continues through mold under the pulling force effect of drawbench master cylinder, you can continuous cold extracts symbol
Close desired cylinder barrel.
Claims (1)
1. a kind of cold drawing die having dust blowing function, it is characterized in that it includes core bar, external mold dust scraping ring, internal model dust scraping ring, external mold
And internal model；Internal model is relied on and is threadedly secured on core bar；Internal model is located in the endoporus of external mold, and internal model is overlapped with the center of external mold；Outside
Mould inner wall is equipped with an internal channel, and an external mold dust scraping ring is equipped in internal channel；The appearance of internal model on rear side of external mold dust scraping ring
Face is equipped with an outer channel, and an internal model dust scraping ring is equipped in outer channel；It is cylinder barrel cold-drawn processing district between external mold and internal model；Cylinder
Cylinder cold-drawn processing district includes dust blowing area, diameter reducing area, wall-thickness reduction zone and sizing area successively；In cylinder barrel Cold Drawing Process, dust blowing area is main
For being struck off in advance by the remnant of cold-drawn cylinder barrel surfaces externally and internally；Diameter reducing area is mainly used for reducing the outer diameter of cylinder barrel；Subtract wall
Area is mainly used for that the wall thickness of cylinder barrel is thinned；Sizing area is mainly used for the inside/outside diameter size of sizing cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810211369.5A CN108380680A (en) | 2018-03-14 | 2018-03-14 | A kind of cold drawing die having dust blowing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810211369.5A CN108380680A (en) | 2018-03-14 | 2018-03-14 | A kind of cold drawing die having dust blowing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108380680A true CN108380680A (en) | 2018-08-10 |
Family
ID=63067439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810211369.5A Pending CN108380680A (en) | 2018-03-14 | 2018-03-14 | A kind of cold drawing die having dust blowing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108380680A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857278A (en) * | 2021-09-29 | 2021-12-31 | 大连开成钢管有限公司 | GY type internal mold for cold-drawing steel pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143859U (en) * | 1978-03-31 | 1979-10-05 | ||
| JP2003112218A (en) * | 2001-09-28 | 2003-04-15 | Usui Internatl Ind Co Ltd | Method for manufacturing thick-wall thin-diameter tube |
| CN202224462U (en) * | 2011-08-08 | 2012-05-23 | 浙江海亮股份有限公司 | Non-indentation continuous stretching device |
| JP2012115907A (en) * | 2012-02-06 | 2012-06-21 | Showa Denko Kk | Device and method of drawing metal tube |
| JP2013010143A (en) * | 2012-10-01 | 2013-01-17 | Showa Denko Kk | Method for manufacturing aluminum pipe for photoconductive drum base body |
| CN207929782U (en) * | 2018-03-14 | 2018-10-02 | 江阴市洪腾机械有限公司 | A kind of cold drawing die having dust blowing function |
| CN209094195U (en) * | 2018-09-06 | 2019-07-12 | 青岛东方永顺钢管有限公司 | It is a kind of for producing the cold drawing die of galvanized pipe |
-
2018
- 2018-03-14 CN CN201810211369.5A patent/CN108380680A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54143859U (en) * | 1978-03-31 | 1979-10-05 | ||
| JP2003112218A (en) * | 2001-09-28 | 2003-04-15 | Usui Internatl Ind Co Ltd | Method for manufacturing thick-wall thin-diameter tube |
| CN202224462U (en) * | 2011-08-08 | 2012-05-23 | 浙江海亮股份有限公司 | Non-indentation continuous stretching device |
| JP2012115907A (en) * | 2012-02-06 | 2012-06-21 | Showa Denko Kk | Device and method of drawing metal tube |
| JP2013010143A (en) * | 2012-10-01 | 2013-01-17 | Showa Denko Kk | Method for manufacturing aluminum pipe for photoconductive drum base body |
| CN207929782U (en) * | 2018-03-14 | 2018-10-02 | 江阴市洪腾机械有限公司 | A kind of cold drawing die having dust blowing function |
| CN209094195U (en) * | 2018-09-06 | 2019-07-12 | 青岛东方永顺钢管有限公司 | It is a kind of for producing the cold drawing die of galvanized pipe |
Non-Patent Citations (1)
| Title |
|---|
| 李连诗等: "《钢管塑性变形原理 下册》", 四川科学技术出版社, pages: 196 - 198 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113857278A (en) * | 2021-09-29 | 2021-12-31 | 大连开成钢管有限公司 | GY type internal mold for cold-drawing steel pipe |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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