CN112547824A - Automatic aligning outer die holder for cold drawing of steel pipe - Google Patents
Automatic aligning outer die holder for cold drawing of steel pipe Download PDFInfo
- Publication number
- CN112547824A CN112547824A CN202011507766.0A CN202011507766A CN112547824A CN 112547824 A CN112547824 A CN 112547824A CN 202011507766 A CN202011507766 A CN 202011507766A CN 112547824 A CN112547824 A CN 112547824A
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- China
- Prior art keywords
- aligning
- die
- die sleeve
- hole
- sleeve
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- 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
- B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
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- 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
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- 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
- B21C3/12—Die holders; Rotating dies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Extraction Processes (AREA)
Abstract
The invention discloses an automatic aligning outer die holder for cold drawing of a steel pipe, which comprises: the base, be equipped with the mounting hole in the base, insert in the mounting hole and be equipped with the aligning die sleeve, the aligning die sleeve passes through the bearing and installs in the mounting hole, be equipped with annular flange on the preceding port of mounting hole, aligning die sleeve front end offsets with annular flange and leans on, be equipped with the aligning boss on the outer lane lateral wall of aligning die sleeve, the bearing housing is in the outside of aligning boss, be equipped with the anticreep board on the rear end of aligning die sleeve, be equipped with the through-hole on the anticreep board, wear to be equipped with the anticreep bolt in the through-hole, insert in the aligning die sleeve and be equipped with the die ring, be equipped with the fixed plate on the rear end of die ring, be provided with. The self-aligning die sleeve in the outer die holder can drive the outer die to swing through the self-aligning boss and the bearing along with the fluctuation of the wall thickness to automatically and slightly align, so that the straightness of the steel pipe can be improved, the wall thickness difference can be reduced, in addition, the outer die can be uniformly stressed, and the service life of the outer die can be greatly prolonged.
Description
Technical Field
The invention relates to the field of steel pipe cold-drawing die tools, in particular to an automatic aligning outer die holder for steel pipe cold drawing.
Background
The outer diameter of the steel pipe can be reduced after the steel pipe is drawn and passes through the outer die. The external mold is installed in the external mold seat, and the structure of current external mold seat includes: the base is provided with a mounting hole which penetrates through the base from front to back, and the outer die is mounted in the mounting hole. The wall thickness of the blank pipe has errors, the outer die cannot be aligned by the conventional outer die holder along with the fluctuation of the wall thickness of the blank pipe, so that the reduction amount of the wall thickness of each part of the blank pipe during diameter reduction can be different, the straightness of the steel pipe after cold drawing can be influenced, the wall thickness difference is increased, in addition, the outer die is stressed unevenly, the outer die is usually made of tungsten steel, and the tungsten steel is easy to break when stressed unevenly, so that the service life of the outer die is greatly reduced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: an automatic aligning outer die holder for cold drawing of steel pipes is provided, which can automatically align with the fluctuation of the wall thickness of a blank pipe.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the utility model provides a steel pipe is automatic aligning outer die holder for cold drawing, includes: the base is provided with the mounting hole that runs through the base around one in the base, its characterized in that: an annular aligning die sleeve is inserted in the mounting hole, an outer die for cold drawing of the steel pipe is mounted in the aligning die sleeve, the aligning die sleeve is mounted in the mounting hole through a bearing, so that the aligning die sleeve can rotate in the mounting hole, an annular flange is arranged on a front port of the mounting hole, the front end of the aligning die sleeve abuts against the annular flange, the front end face of the aligning die sleeve is spherical, the end face abutting against the aligning die sleeve on the annular flange is also spherical, an annular aligning boss is arranged on the outer ring side wall of the aligning die sleeve, the bearing sleeve is mounted on the outer side of the aligning boss, the surface of the aligning boss is a cambered surface, an anti-falling plate is arranged on the rear end of the aligning die sleeve, a through hole is formed in the anti-falling plate, an anti-falling bolt screwed into the base is arranged in the through hole in a penetrating manner, the anti-falling bolt is used for preventing the aligning die sleeve from moving backwards to leave the base but not locking the aligning die sleeve in, and the clearance between anticreep bolt and the through-hole enables the anticreep bolt not to hinder aligning die sleeve swing aligning, inserts in aligning die sleeve and is equipped with an annular moulding-die ring, and the moulding-die ring is used for pushing down the external mold of installing in aligning die sleeve to can prevent that the external mold from moving backward and break away from aligning die sleeve, is provided with a fixed plate on the rear end of moulding-die ring, is provided with the fixed orifices on the fixed plate, wears to be equipped with the locking bolt of screw in to the anticreep board in the fixed orifices, and the locking bolt is used for locking moulding-die ring and aligning die sleeve mutually.
Further, aforementioned automatic aligning outer die holder is used in steel pipe cold drawing, wherein: the fixing hole is a gourd-shaped hole which is formed by connecting a small hole and a large hole, the diameter of the large hole is larger than that of the locking bolt head, and the diameter of the small hole is smaller than that of the locking bolt head.
Further, aforementioned automatic aligning outer die holder is used in steel pipe cold drawing, wherein: an annular anti-blocking inclined plane is arranged on the outer ring at the front end of the pressing die ring.
Further, aforementioned automatic aligning outer die holder is used in steel pipe cold drawing, wherein: the bearing is an annular plane ball bearing.
Further, aforementioned automatic aligning outer die holder is used in steel pipe cold drawing, wherein: an annular guide inclined plane is arranged on the side wall of the inner ring at the rear end of the pressing die ring.
Further, aforementioned automatic aligning outer die holder is used in steel pipe cold drawing, wherein: the diameters of the two spherical surfaces at the abutting positions of the aligning die sleeve and the annular flanges are equal.
The invention has the advantages that: the self-aligning die sleeve in the automatic self-aligning outer die base for cold drawing of the steel pipe can drive the outer die to swing through the self-aligning boss and the bearing along with the fluctuation of the wall thickness to automatically and slightly align, so that the reduction amount of the wall thickness of each part of the blank pipe during diameter reduction tends to be consistent, the straightness of the steel pipe after cold drawing can be improved, the wall thickness difference can be reduced, in addition, the outer die can be uniformly stressed, and the service life of the outer die can be greatly prolonged.
Drawings
Fig. 1 is a schematic structural view of an automatic aligning outer die holder for cold drawing of a steel tube according to the present invention.
Fig. 2 is a right-view structural diagram of fig. 1.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and the attached drawings.
As shown in fig. 1 and 2, an automatic aligning outer die holder for cold drawing of steel pipes includes: the steel pipe cold drawing device comprises a base 1, wherein a mounting hole 2 penetrating through the base from front to back is formed in the base 1, an annular aligning die sleeve 3 is inserted into the mounting hole 2, an outer die 9 used for cold drawing of a steel pipe is mounted in the aligning die sleeve 3, the aligning die sleeve 3 is mounted in the mounting hole 2 through a bearing 4, so that the aligning die sleeve 3 can rotate in the mounting hole 2, an annular flange 5 is arranged at the front end of the mounting hole 2, the front end of the aligning die sleeve 3 abuts against the annular flange 5, the front end face of the aligning die sleeve 3 is a spherical surface, the end face of the annular flange 5 abutting against the aligning die sleeve 3 is also a spherical surface, an annular aligning boss 6 is arranged on the outer ring side wall of the aligning die sleeve 3, the bearing 4 is sleeved outside the aligning boss 6, the surface of the aligning boss 6 is a spherical surface, an anti-off plate 31 is arranged at the rear end of the aligning die sleeve 3, a through hole 32 is arranged on the anti-off plate 31, an anti-falling bolt screwed into the base 1 penetrates through the through hole 32, the anti-falling bolt is not shown in the figure, the anti-falling bolt is used for preventing the aligning die sleeve 3 from moving backwards to leave the base 1, but the aligning die sleeve 3 is not locked in the axial direction, the anti-falling bolt can be enabled to be free from preventing the aligning die sleeve 3 from swinging and aligning through a gap between the anti-falling bolt and the through hole 32, an annular pressing die ring 7 is inserted into the aligning die sleeve 3, the pressing die ring 7 is used for pressing the outer die 9 installed in the aligning die sleeve 3 so as to prevent the outer die 9 from moving backwards to leave the aligning die sleeve 3, a fixing plate 71 is arranged at the rear end of the pressing die ring 7, a fixing hole 72 is formed in the fixing plate 71, a locking bolt screwed into the anti-falling plate 31 penetrates through the fixing hole 72, and is not shown in the figure, and the locking bolt is used for locking the pressing die ring 7 and the aligning.
The front end face of the aligning die sleeve 3 is a spherical face, and the end face, which is abutted against the aligning die sleeve 3, on the annular flange 5 is also a spherical face, so that the aligning die sleeve 3 can drive the outer die 9 to swing through the aligning boss 6 and the bearing 4 along with the fluctuation of the wall thickness to automatically and slightly align, and the reduction amount of the wall thickness at each position during reducing the diameter of the blank pipe can tend to be consistent, thereby improving the straightness of the steel pipe after cold drawing and reducing the wall thickness difference.
In this embodiment, the fixing hole 72 is a gourd-shaped hole, the gourd-shaped hole is formed by connecting a small hole and a large hole, the diameter of the large hole is larger than that of the locking bolt head, and the diameter of the small hole is smaller than that of the locking bolt head, so that the die pressing ring 7 is convenient to mount and dismount after the fixing hole is arranged. An annular anti-sticking inclined surface 73 is provided on the outer ring of the front end of the die ring 7. The bearing 4 is an annular flat ball bearing. An annular guide slope 74 is provided on the inner ring side wall at the rear end of the die ring 7. The diameters of the two spherical surfaces at the abutting positions of the aligning die sleeve 3 and the annular flanges 5 are equal.
Claims (6)
1. The utility model provides a steel pipe is automatic aligning outer die holder for cold drawing, includes: the base is provided with the mounting hole that runs through the base around one in the base, its characterized in that: an annular aligning die sleeve is inserted in the mounting hole, an outer die for cold drawing of the steel pipe is mounted in the aligning die sleeve, the aligning die sleeve is mounted in the mounting hole through a bearing, so that the aligning die sleeve can rotate in the mounting hole, an annular flange is arranged on a front port of the mounting hole, the front end of the aligning die sleeve abuts against the annular flange, the front end face of the aligning die sleeve is spherical, the end face abutting against the aligning die sleeve on the annular flange is also spherical, an annular aligning boss is arranged on the outer ring side wall of the aligning die sleeve, the bearing sleeve is mounted on the outer side of the aligning boss, the surface of the aligning boss is a cambered surface, an anti-falling plate is arranged on the rear end of the aligning die sleeve, a through hole is formed in the anti-falling plate, an anti-falling bolt screwed into the base is arranged in the through hole in a penetrating manner, the anti-falling bolt is used for preventing the aligning die sleeve from moving backwards to leave the base but not locking the aligning die sleeve in, and the clearance between anticreep bolt and the through-hole enables the anticreep bolt not to hinder aligning die sleeve swing aligning, inserts in aligning die sleeve and is equipped with an annular moulding-die ring, and the moulding-die ring is used for pushing down the external mold of installing in aligning die sleeve to can prevent that the external mold from moving backward and break away from aligning die sleeve, is provided with a fixed plate on the rear end of moulding-die ring, is provided with the fixed orifices on the fixed plate, wears to be equipped with the locking bolt of screw in to the anticreep board in the fixed orifices, and the locking bolt is used for locking moulding-die ring and aligning die sleeve mutually.
2. The automatic aligning outer die holder for cold drawing of the steel tube according to claim 1, wherein: the fixing hole is a gourd-shaped hole which is formed by connecting a small hole and a large hole, the diameter of the large hole is larger than that of the locking bolt head, and the diameter of the small hole is smaller than that of the locking bolt head.
3. The automatic aligning outer die holder for cold drawing of the steel tube according to claim 1, wherein: an annular anti-blocking inclined plane is arranged on the outer ring at the front end of the pressing die ring.
4. The automatic aligning outer die holder for cold drawing of the steel tube according to claim 1, wherein: the bearing is an annular plane ball bearing.
5. The automatic aligning outer die holder for cold drawing of the steel tube according to claim 1, wherein: an annular guide inclined plane is arranged on the side wall of the inner ring at the rear end of the pressing die ring.
6. The automatic aligning outer die holder for cold drawing of the steel tube according to claim 1, wherein: the diameters of the two spherical surfaces at the abutting positions of the aligning die sleeve and the annular flanges are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011507766.0A CN112547824A (en) | 2020-12-18 | 2020-12-18 | Automatic aligning outer die holder for cold drawing of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011507766.0A CN112547824A (en) | 2020-12-18 | 2020-12-18 | Automatic aligning outer die holder for cold drawing of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112547824A true CN112547824A (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011507766.0A Pending CN112547824A (en) | 2020-12-18 | 2020-12-18 | Automatic aligning outer die holder for cold drawing of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112547824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570670A (en) * | 2022-05-06 | 2022-06-03 | 张家港保税区亚鑫精密制管有限公司 | Necking pipe fitting necking strength detection tool |
-
2020
- 2020-12-18 CN CN202011507766.0A patent/CN112547824A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114570670A (en) * | 2022-05-06 | 2022-06-03 | 张家港保税区亚鑫精密制管有限公司 | Necking pipe fitting necking strength detection tool |
| CN114570670B (en) * | 2022-05-06 | 2022-08-05 | 张家港保税区亚鑫精密制管有限公司 | Necking pipe fitting necking strength detection tool |
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