CN105880288A - Internal thread mold for cold-rolled pipe - Google Patents
Internal thread mold for cold-rolled pipe Download PDFInfo
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- CN105880288A CN105880288A CN201610330196.XA CN201610330196A CN105880288A CN 105880288 A CN105880288 A CN 105880288A CN 201610330196 A CN201610330196 A CN 201610330196A CN 105880288 A CN105880288 A CN 105880288A
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- section
- internal thread
- rolling
- cold rolled
- clamp
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention relates to an internal thread mold for a cold-rolled pipe and belongs to the technical field of metal rolling. The internal thread mold for the cold-rolled pipe is a rod-shaped body and sequentially comprises a squeezing-in section, a rolling section and an extruding section, wherein the squeezing-in section, the rolling section and the extruding section are integrally connected. Threaded grooves are formed in the outer surface of the rolling section and the outer surface of the extruding section. The depths of the threaded grooves are increased gradually in the direction from the rolling section to the extruding section. According to the internal thread mold for the cold-rolled pipe, the diameter of a circle formed by the outer contour of the cross section is decreased gradually in the direction from the squeezing-in section to the extruding section. The internal thread mold for the cold-rolled pipe is suitable for internal threads of metal pipes machined through a cold rolling method, the thread pitches are uniform, the material strength is high, and both thin-wall metal pipes and thick-wall metal pipes can be rolled.
Description
Technical field
The present invention relates to metal tube rolling technical field, be specifically related to a kind of cold rolled tube internal thread mould.
Background technology
Traditional thread metal generally uses the structure of cold-drawing process machining internal thread, such as: the Chinese invention patent of Application No. CN200510013531.5 discloses the production method of a kind of cold-drawn steel tube with internal thread.
There is following defect in cold-drawing process institute production and processing technology, in Cold Drawing Process, the internal thread spacing of metal tube can produce fine difference, and the homogeneity of internal thread is the best；And owing to having the action of " pulling out " and produced pulling force thereof in Cold Drawing Process, the metal tube that therefore cold-drawing process is not suitable for tube wall is thicker or relatively thin is processed；It addition, the thread metal intensity that cold-drawing process is produced is the best.
Cold-rolling practice provides possibility as the means of machining internal thread for solving the problems referred to above, and uses cold-rolling practice machining internal thread structure to need corresponding internal thread mould to coordinate processing.
Summary of the invention
The purpose of the present invention, is to solve the problems referred to above, it is provided that a kind of cold rolled tube internal thread mould.
The technical scheme that the present invention solves the problems referred to above is as follows:
A kind of cold rolled tube internal thread mould, described cold rolled tube internal thread mould is rhabodoid, includes the section of clamp-oning, rolling section and extruding zone that one is connected successively；The outer surface of described rolling section and described extruding zone is provided with thread-like groove, and the degree of depth of described thread-like groove is gradually deepened to described extruding zone by described rolling section；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning to described extruding zone, and the diameter of a circle that the outline of cross section is formed tapers into.
Cold-drawing technology is that metal tube is carried out stretched operation, cold-rolling process is then that metal tube is carried out squash type operation, the flow direction of metal is different in cold-drawing technology and in cold-rolling process, during cold-drawing technology, thread can occur tiny deviation when stretching under the effect of mould, affect the precision of metal tube internal thread, and inner wall of metal tube is pressed against described mould by cold-rolled process, this problem would not be there is, the precision of the thread metal that cold-rolling process processes out is more preferable, it is applicable to the fields such as firearm chamber pipe, improves the precision of shooting.
The degree of depth of described thread-like groove is gradually deepened to described extruding zone by described rolling section so that the thread of internal thread gradually forms in cold-rolled process stage by stage, improves homogeneity and the stability of material of internal thread；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning to described extruding zone, the diameter of a circle that the outline of cross section is formed tapers into, metal tube is more prone to when cold rolling traveling forward, also complies with cold-rolling process rolling and metal tube is calendered or even the most thinning trend.
Preferred as technique scheme, it is curve that the diameter of a circle that the outline of described cross section is formed tapers into two long limits of the axial cross section so that described cold rolled tube internal thread mould, i.e. from the described section of clamp-oning to described extruding zone, the speed that the diameter of a circle that the outline of cross section is formed diminishes is gradually reduced.
Curvilinear long limit is for the material behavior of complexed metal pipe so that it is be easier to rolling.
Metal material itself has certain elastic force, and the amount of rolling is the most, and the power required for rolling is the biggest, and curvilinear long limit is that the flowing of metal provides additional space and promotes the inclined-plane of its flow forward in the rolling direction, and rolling is got up more laborsaving.
Preferred as technique scheme, two described long limits near described in the part of the section of clamp-oning be curve, the part near described extruding zone is straight line.
Preferred as technique scheme, described curve is a parabolical part.
The present inventor, through overtesting, finds that the trend of parabolic curvature change is more suitable for the rolling of metal material, more mates with the characteristic of metal material, therefore uses a parabolical part as the shape of curve at this.
At the outermost portion of extruding zone, the wall thickness of metal tube and internal-and external diameter have tended to sizing, it is only necessary to the mould complexed metal pipe of straight line.
Preferred as technique scheme, described in the section of clamp-oning one end of described rolling section is provided with installation portion.
Preferred as technique scheme, described installation portion for being provided with externally threaded rhabodoid, the diameter of the cross section of described installation portion be less than described in the diameter of cross section of the section of clamp-oning.
Installation portion is used for connecting and fix described internal thread mould.
Preferred as technique scheme, described in the outer surface of the section of clamp-oning be shiny surface.
Preferred as technique scheme, described extruding zone includes rolling solid section near the screw thread deepened section of described rolling section and the screw thread away from described rolling section, and in described screw thread deepened section, the degree of depth of thread-like groove gradually deepens no longer to deepen until rolling solid section to described screw thread.
In sum, the method have the advantages that
A kind of cold rolled tube internal thread mould the most of the present invention is applicable to the internal thread of cold-rolling practice processing metal tube；
The thread metal pitch stable uniform that a kind of cold rolled tube internal thread mould the most of the present invention is produced, the strength of materials is high, it is possible to roll the metal tube of relatively thin and thicker tube wall；
A kind of cold rolled tube internal thread mould complexed metal properties of materials the most of the present invention, is provided with the long limit of curve so that cold-rolled process is easier to, and feeding of metal tube is more laborsaving.
Accompanying drawing explanation
Fig. 1 is a kind of cold rolled tube internal thread mould structure schematic diagram described in embodiment 1；
Fig. 2 is a kind of cold rolled tube internal thread mould structure schematic diagram described in embodiment 2；
Fig. 3 is a kind of cold rolled tube internal thread mould structure schematic diagram described in embodiment 3；
Fig. 4 is Steel Pipe Cold and described internal thread mould fit structure schematic diagram；
In figure, the 1-section of clamp-oning, 2-rolling section, 3-extruding zone, 31-screw thread deepened section, 32-screw thread roll solid section, 4-installation portion, 5-cold tube rolling.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained under not doing creative work premise, broadly fall into the scope of protection of the invention.
With embodiment, the present invention is described in detail below in conjunction with the accompanying drawings.
Embodiment 1: a kind of cold rolled tube internal thread mould, described cold rolled tube internal thread mould is rhabodoid, includes the section of clamp-oning 1, rolling section 2 and extruding zone 3 that one is connected successively；The outer surface of the described section of clamp-oning 1 is shiny surface, and the outer surface of described rolling section 2 and described extruding zone 3 is provided with thread-like groove, and the degree of depth of described thread-like groove is gradually deepened to described extruding zone 3 by described rolling section 2；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning 1 to described extruding zone 3, and the diameter of a circle that the outline of cross section is formed tapers into；The described section of clamp-oning 1 is provided with installation portion 4 away from one end of described rolling section 2, described installation portion 4 for being provided with externally threaded rhabodoid, the diameter of the cross section of described installation portion 4 be less than described in the diameter of cross section of the section of clamp-oning 1.
Cold tube rolling 5 clamp-oned by the section of clamp-oning 1, roll conjunction mutually with thread-like groove at rolling section 2 and extruding zone 3, and is fed forward by extruding zone.
Embodiment 2: a kind of cold rolled tube internal thread mould, described cold rolled tube internal thread mould is rhabodoid, includes the section of clamp-oning 1, rolling section 2 and extruding zone 3 that one is connected successively；The outer surface of the described section of clamp-oning 1 is shiny surface, and the outer surface of described rolling section 2 and described extruding zone 3 is provided with thread-like groove, and the degree of depth of described thread-like groove is gradually deepened to described extruding zone 3 by described rolling section 2；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning 1 to described extruding zone 3, and the diameter of a circle that the outline of cross section is formed tapers into；The described section of clamp-oning 1 is provided with installation portion 4 away from one end of described rolling section 2, described installation portion 4 for being provided with externally threaded rhabodoid, the diameter of the cross section of described installation portion 4 be less than described in the diameter of cross section of the section of clamp-oning 1.
It is a parabolical part that the diameter of a circle that the outline of described cross section is formed tapers into two long limits of the axial cross section so that described cold rolled tube internal thread mould, i.e. it is gradually reduced to described extruding zone 3, the speed that the diameter of a circle that the outline of cross section is formed diminishes from the described section of clamp-oning 1.
Cold tube rolling 5 clamp-oned by the section of clamp-oning 1, roll conjunction mutually with thread-like groove at rolling section 2 and extruding zone 3, and is fed forward by extruding zone.
Embodiment 3: a kind of cold rolled tube internal thread mould, described cold rolled tube internal thread mould is rhabodoid, includes the section of clamp-oning 1, rolling section 2 and extruding zone 3 that one is connected successively；The outer surface of the described section of clamp-oning 1 is shiny surface, and the outer surface of described rolling section 2 and described extruding zone 3 is provided with thread-like groove, and the degree of depth of described thread-like groove is gradually deepened to described extruding zone 3 by described rolling section 2；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning 1 to described extruding zone 3, and the diameter of a circle that the outline of cross section is formed tapers into；The described section of clamp-oning 1 is provided with installation portion 4 away from one end of described rolling section 2, described installation portion 4 for being provided with externally threaded rhabodoid, the diameter of the cross section of described installation portion 4 be less than described in the diameter of cross section of the section of clamp-oning 1.
It is curve that the diameter of a circle that the outline of described cross section is formed tapers into two long limits of the axial cross section so that described cold rolled tube internal thread mould, i.e. from the described section of clamp-oning 1 to described extruding zone 3, the speed that the diameter of a circle that the outline of cross section is formed diminishes is gradually reduced, described in two described long limits are close, a part for the section of clamp-oning 1 is curve, and the part near described extruding zone 3 is straight line.
Described extruding zone 3 includes rolling solid section 32 near the screw thread deepened section 31 of described rolling section 2 and the screw thread away from described rolling section 2, and in described screw thread deepened section 31, the degree of depth of thread-like groove gradually deepens no longer to deepen until rolling solid section 32 to described screw thread.
Cold tube rolling 5 clamp-oned by the section of clamp-oning 1, roll conjunction mutually with thread-like groove at rolling section 2 and extruding zone 3, and is fed forward by extruding zone.
Claims (8)
1. a cold rolled tube internal thread mould, it is characterised in that: described cold rolled tube internal thread mould is rhabodoid, includes the section of clamp-oning (1), rolling section (2) and extruding zone (3) that one is connected successively；The outer surface of described rolling section (2) and described extruding zone (3) is provided with thread-like groove, and the degree of depth of described thread-like groove is gradually deepened to described extruding zone (3) by described rolling section (2)；Described cold rolled tube internal thread mould is on the direction of the described section of clamp-oning (1) to described extruding zone (3), and the diameter of a circle that the outline of cross section is formed tapers into.
A kind of cold rolled tube internal thread mould the most according to claim 1, it is characterized in that: it is curve that the diameter of a circle that the outline of described cross section is formed tapers into two long limits of the axial cross section so that described cold rolled tube internal thread mould, i.e. from the described section of clamp-oning (1) to described extruding zone (3), the speed that the diameter of a circle that the outline of cross section is formed diminishes is gradually reduced.
A kind of cold rolled tube internal thread mould the most according to claim 2, it is characterised in that: described in two described long limits are close, a part for the section of clamp-oning (1) is curve, and the part near described extruding zone (3) is straight line.
4. according to a kind of cold rolled tube internal thread mould described in Claims 2 or 3, it is characterised in that: described curve is a parabolical part.
A kind of cold rolled tube internal thread mould the most according to claim 1, it is characterised in that the section of clamp-oning described in: (1) is provided with installation portion (4) away from one end of described rolling section (2).
A kind of cold rolled tube internal thread mould the most according to claim 5, it is characterised in that: described installation portion (4) for being provided with externally threaded rhabodoid, the diameter of the cross section of described installation portion (4) be less than described in the diameter of cross section of the section of clamp-oning (1).
A kind of cold rolled tube internal thread mould the most according to claim 1, it is characterised in that the outer surface of the section of clamp-oning described in: (1) is shiny surface.
A kind of cold rolled tube internal thread mould the most according to claim 1, it is characterized in that: described extruding zone (3) includes rolling solid section (32) near the screw thread deepened section (31) of described rolling section (2) and the screw thread away from described rolling section (2), and the degree of depth of the upper thread-like groove of described screw thread deepened section (31) gradually deepens no longer to deepen until rolling solid section (32) to described screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610330196.XA CN105880288B (en) | 2016-05-18 | 2016-05-18 | A kind of cold rolled tube internal thread mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610330196.XA CN105880288B (en) | 2016-05-18 | 2016-05-18 | A kind of cold rolled tube internal thread mould |
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| CN105880288A true CN105880288A (en) | 2016-08-24 |
| CN105880288B CN105880288B (en) | 2017-11-24 |
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| CN201610330196.XA Active CN105880288B (en) | 2016-05-18 | 2016-05-18 | A kind of cold rolled tube internal thread mould |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425696A (en) * | 1981-07-02 | 1984-01-17 | Carrier Corporation | Method of manufacturing a high performance heat transfer tube |
| GB2183519A (en) * | 1985-12-02 | 1987-06-10 | Carrier Corp | Method of and apparatus for producing helically finned tubes |
| JPH0952127A (en) * | 1995-08-14 | 1997-02-25 | Kobe Steel Ltd | Manufacture and its device for heat transfer tube with inner groove |
| CN101284297A (en) * | 2007-04-13 | 2008-10-15 | 覃昌钢 | Processing method and apparatus of internal thread aluminium pipe |
| CN201969817U (en) * | 2010-11-26 | 2011-09-14 | 宁波金田铜管有限公司 | Copper pipe internal thread forming device |
| CN104759502A (en) * | 2015-03-17 | 2015-07-08 | 中国科学院金属研究所 | Processing method for aluminum or aluminum alloy pipe with thread inner tendon |
| CN205732574U (en) * | 2016-05-18 | 2016-11-30 | 常州市环华机械有限公司 | A kind of cold rolled tube female thread mould |
-
2016
- 2016-05-18 CN CN201610330196.XA patent/CN105880288B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4425696A (en) * | 1981-07-02 | 1984-01-17 | Carrier Corporation | Method of manufacturing a high performance heat transfer tube |
| GB2183519A (en) * | 1985-12-02 | 1987-06-10 | Carrier Corp | Method of and apparatus for producing helically finned tubes |
| JPH0952127A (en) * | 1995-08-14 | 1997-02-25 | Kobe Steel Ltd | Manufacture and its device for heat transfer tube with inner groove |
| CN101284297A (en) * | 2007-04-13 | 2008-10-15 | 覃昌钢 | Processing method and apparatus of internal thread aluminium pipe |
| CN201969817U (en) * | 2010-11-26 | 2011-09-14 | 宁波金田铜管有限公司 | Copper pipe internal thread forming device |
| CN104759502A (en) * | 2015-03-17 | 2015-07-08 | 中国科学院金属研究所 | Processing method for aluminum or aluminum alloy pipe with thread inner tendon |
| CN205732574U (en) * | 2016-05-18 | 2016-11-30 | 常州市环华机械有限公司 | A kind of cold rolled tube female thread mould |
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| CN105880288B (en) | 2017-11-24 |
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