CN207563449U - A kind of cold drawing die for improving steel tube inner hole spiral defect - Google Patents
A kind of cold drawing die for improving steel tube inner hole spiral defect Download PDFInfo
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- CN207563449U CN207563449U CN201721781397.8U CN201721781397U CN207563449U CN 207563449 U CN207563449 U CN 207563449U CN 201721781397 U CN201721781397 U CN 201721781397U CN 207563449 U CN207563449 U CN 207563449U
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- Prior art keywords
- calibrating strap
- cold drawing
- steel pipe
- conical surface
- cylinder
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 59
- 239000010959 steel Substances 0.000 title claims abstract description 59
- 238000010622 cold drawing Methods 0.000 title claims abstract description 27
- 230000007547 defect Effects 0.000 title claims abstract description 18
- 230000001603 reducing effect Effects 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 5
- 238000004513 sizing Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 201000009240 nasopharyngitis Diseases 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000009785 tube rolling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Metal Extraction Processes (AREA)
Abstract
The utility model announces a kind of cold drawing die for improving steel tube inner hole spiral defect, belongs to steel pipe technical field of processing equipment.Including internal model and external mold；The first conical surface reducing band, the first cylinder calibrating strap, the second conical surface reducing band and the second cylinder calibrating strap are equipped on the periphery of the internal model successively；Multiple diversion trenches uniformly distributed along the first cylinder calibrating strap center are provided on the first cylinder calibrating strap；The both ends of the diversion trench connect respectively with the first conical surface reducing band, the second conical surface reducing band.Round-corner transition between the diversion trench both sides and the cylindrical surface of the second cylinder calibrating strap.The cold drawing die of the utility model is in Cold Drawing Process, during first cylinder calibrating strap of the steel pipe Jing Guo internal model, metal can be forced to flow to diversion trench bottom direction, steel pipe just produces the flowing of circumferencial direction, and the wall thickness difference of originally axial wall thickness is just homogenized.The utility model improves the endoporus Metal Distribution of steel pipe, thoroughly eliminates steel tube inner hole spiral defect.
Description
Technical field
It is specifically a kind of to improve the cold of steel tube inner hole spiral defect the utility model is related to steel pipe technical field of processing equipment
Draft has.
Background technology
Cold-drawing technology avoids the machining of metal, and stock utilization is made significantly to be promoted.As Chinese patent is announced
" there is reducing twice and twice the Tube Drawing mold of setting ", the patent No.：201210095216.1 make in Cold Drawing Process
Mold generally comprises internal model and external mold, as shown in Figure 1；Cold-drawn efficiency also improves decades of times than lathe machining mode,
Just because of the efficient material-saving of cold-drawn, cold drawing steel tube is largely used when oil cylinder produces.
The steel pipe that domestic cold-drawn is typically chosen single chassis Tube Rolling Train with Semi Finished Hot-finished tube or continuous rolling-tube unit produces：
For single chassis pipe mill：In process of production, by the roll with oblique angle of three rotations, the rotation of steel pipe side is driven
Turn advance side and reduce wall thickness, since all in screw, axially Wall-Thickness Difference is just produced along steel pipe for steel pipe and hole inner core rod at this time
Value, which advances in shape of threads, here it is the mechanism of production of endoporus spiral, as shown in Fig. 2, the spiral is characterized in that steel pipe is every
The top of a cross section and lower part wall thickness value are and asymmetric all in sinusoidal variation, and the center line in all sections is along steel pipe
Axially in the shape of a spiral；Such steel pipe is in cold-drawn and subsequent endoporus shaving action, due to cold drawing die and Shave tool all
It floats up and down in steel pipe axis, so this endoporus spiral can not be eliminated by cold-drawn and shaving action, uses the drawn tube
The hydraulic cylinder of manufacture will generate shake and the creeping phenomenon of cylinder piston rod during the motion；
For continuous rolling-tube unit：When subtracting wall production, steel pipe is non-rotary, is directly advanced axially relative, so steel pipe does not have
Endoporus spiral defect can meet cold-drawn needs, but continuous rolling-tube unit needs 100 tons of ordering amount or more.Due to cold
It is all small lot to pull out production, multiple batches of, general primary 5 ~ 10 tons of order, it is impossible to reach hundreds of tons, so, when ordering goods one
As be merely able to the steel pipe of selection single chassis Tube Rolling Train production.
In order to solve the problems, such as steel tube inner hole spiral, it is usually in the prior art：
（1）By endoporus metal cutting process, endoporus spiral defect turnery processing is fallen with machining mode, but, it cuts
It is big to cut allowance, metal lumber recovery only has 60% or so, has nearly 40% tube material to be cut to cut for iron, wastes former material
Material；
（2）Cold-drawing technology metal lumber recovery can reach more than 90%, and still, cold-drawn processing method is due to inner die for cold-drawn process meeting
It floats in steel tube inner hole, the thickness of steel pipe difference of each cross section is unable to reach homogenization, so steel tube inner hole spiral shell can not be eliminated
Rotation is merely able to carry out steel tube inner hole reparation by subsequently increasing a honing process.Honing method not only increase processing charges,
Time influences delivery, and if raw steel pipe has serious endoporus spiral defect that can not also repair, is merely able to scrap processing.
Invention content
In order to solve the above technical problems, the utility model provides a kind of cold drawing die for improving steel tube inner hole spiral defect,
The utility model improves steel tube inner hole spiral during cold-drawn, so as to save subsequent processing program.
The utility model is achieved through the following technical solutions：A kind of cold drawing die for improving steel tube inner hole spiral defect, packet
Include internal model and external mold；The first conical surface reducing band, the first cylinder calibrating strap, second conical surface are equipped on the periphery of the internal model successively
Reducing band and the second cylinder calibrating strap；It is provided on the first cylinder calibrating strap multiple uniformly distributed along the first cylinder calibrating strap center
Diversion trench；The both ends of the diversion trench connect respectively with the first conical surface reducing band, the second conical surface reducing band.
Preferably：Round-corner transition between the diversion trench both sides and the cylindrical surface of the second cylinder calibrating strap.
Preferably：The diversion trench shares 10.
Preferably：There are one cylindrical through-hole, the tapered faces in external mold through-hole one end for the external mold.
Common cold drawing die is merely able to the wall thickness reduction for making steel pipe in each section, along steel pipe axial wall thickness difference
It can not eliminate, the center of circle still equally up-and-down variation of spiral in each section of steel pipe can not change, spiral phenomenon is always
In the presence of, so, common cold drawing die can not change the spiral phenomenon of steel pipe.
The cold drawing die of the utility model is in Cold Drawing Process, can be strong during first cylinder calibrating strap of the steel pipe Jing Guo internal model
Urgent metal flows to diversion trench bottom direction, and steel pipe just produces the wall thickness difference of the flowing of circumferencial direction, originally axial wall thickness
Just it is homogenized.When Tube Drawing is to the second cylinder calibrating strap, the metal at diversion trench bottom flattens again, and metal is in circumference side
To secondary flow has been carried out, just mitigate the endoporus spiral phenomenon of steel pipe and even thoroughly disappear.
Compared with prior art, the beneficial effects of the utility model are：During cold-drawn, internal model forces steel tube inner hole metal in horizontal stroke
Section generates circumferential flow, improves the endoporus Metal Distribution of steel pipe, thoroughly eliminates steel tube inner hole spiral defect.
Description of the drawings
Fig. 1 is involved a kind of cold drawing die in background technology；
Fig. 2 is steel tube inner hole helical structure schematic diagram；
Fig. 3 is the utility model structure diagram；
Fig. 4 is the left view of internal model；
Fig. 5 is A-A direction views in Fig. 4.
In figure：1st, internal model；1-1, the first conical surface reducing band；1-2, the first cylinder calibrating strap；1-3, the second conical surface reducing band；
1-4, the second cylinder calibrating strap；1-5, diversion trench；2nd, external mold.
Specific embodiment
It is a specific embodiment of the utility model below, the utility model is described further in conjunction with attached drawing.
As shown in figure 3, a kind of cold drawing die for improving steel tube inner hole spiral defect, including internal model 1 and external mold 2；External mold 2 has
One cylindrical through-hole, the 2 tapered face in through-hole one end of external mold.External mold 2 is consistent with structure commonly used in the prior art, this implementation
Example does not repeat.
The improvements of the present embodiment with：
In conjunction with shown in Fig. 4 and Fig. 5,1 center of internal model is provided with through-hole, for being connect with pull rod；On the periphery of internal model 1 according to
It is secondary to be equipped with the first conical surface reducing band 1-1, the first cylinder calibrating strap 1-2, the second conical surface reducing band 1-3 and the second cylinder calibrating strap 1-
4；10 are provided on first cylinder calibrating strap 1-2 along the uniformly distributed diversion trench 1-5 in the first cylinder calibrating strap 1-2 centers；Diversion trench 1-5
Both ends respectively with the first conical surface reducing band 1-1, the second conical surface reducing band 1-3 connect；Determine with the second cylinder diversion trench 1-5 both sides
Round-corner transition between cylindrical surface of the diameter with 1-4；The corner angle of diversion trench 1-5 are grinding into arc transition；
Preferably：Second cylinder calibrating strap 1-4 a diameter of 160mm, width 30mm；Second conical surface reducing band 1-3 is tilted
10°；First cylinder calibrating strap 1-2 a diameter of 157mm, width 20mm；Diversion trench 1-5 depths is 1mm, and lowest part is a diameter of
155mm；First conical surface reducing band 1-1 tilts 6 °；1 total length of internal model is 140mm.Two calibrating strap diameters differ 3mm, ensure have
Enough pressure makes metal not generate the phenomenon that steel tube inner hole is rough by being driven plain during the second calibrating strap.
The utility model is consistent with the application method of existing cold drawing die, can be applied to domestic Assel（Assel）
On the products such as pipe mill, Accu-Roll pipe mills；
The course of work：
By internal model 1, external mold 2 and penstock installation to be drawn on drawbench, patent is referred to " with reducing twice and twice
The Tube Drawing mold for the function that shapes ", the patent No.：201210095216.1 as shown in Figure 1；
In Cold Drawing Process, steel pipe passes through in the gap that internal model is formed with external mold, under 400 tons of pulling force effects, steel pipe from
The left side starts to move；
During by the first cylinder calibrating strap 1-2, steel pipe metal can be forced to flow to diversion trench 1-5 bottom directions, steel pipe just produces
The mountain peak of raw 10 width 20mm highests 1mm and the mountain valley of 10 minimum 1mm of width 20mm, at this point, steel pipe metal material can be certainly
The small direction flowing of trend resistance, then just produces the deformation of metal circumferencial direction；
Continue cold-drawn,
Steel pipe movement is to the second cylinder calibrating strap 1-4, on the right under the crunch effect of 3mm tube reducings, by steel pipe upper ripple
Peak is flattened with trough, and metal is in the trough that 20mm wide is flowed to from the wave crest of 20mm width, in the flow process of metal, progress
The secondary uniform distribution of wall thickness, another improves the spiral defect of steel pipe.
The cold drawing die of the utility model, force steel pipe have occurred two minor metals from wall thickness to the free flow at the thin place of wall
It is dynamic, according to flow of metal principle, position --- the thinnest part of material of its meeting automatic stream resistance minimum, so the utility model
Cold drawing die thoroughly solve steel pipe wall thickness deviation generate spiral phenomenon.It is processed by the cold drawing die of the utility model
Steel pipe out, evenness of wall thickness is more preferable, and endoporus spiral defect is thoroughly eliminated, would not in this way in subsequent process
The hole size fluctuation of hydraulic cylinder cylinder barrel is generated, the endoporus spiral phenomenon of oil cylinder is also just completely eliminated, has prevented oil cylinder
It shakes, phenomenon of making sound.
Claims (4)
1. a kind of cold drawing die for improving steel tube inner hole spiral defect, including internal model（1）And external mold（2）；It is characterized in that：It is described
Internal model（1）Periphery on successively be equipped with the first conical surface reducing band（1-1）, the first cylinder calibrating strap（1-2）, the second conical surface reducing
Band（1-3）With the second cylinder calibrating strap（1-4）；The first cylinder calibrating strap（1-2）On be provided with it is multiple along the first cylinder sizing
Band（1-2）The uniformly distributed diversion trench in center（1-5）；The diversion trench（1-5）Both ends respectively with the first conical surface reducing band（1-1）、
Second conical surface reducing band（1-3）Connection.
2. a kind of cold drawing die for improving steel tube inner hole spiral defect according to claim 1, it is characterised in that：It is described to lead
Chute（1-5）Both sides and the second cylinder calibrating strap（1-4）Cylindrical surface between round-corner transition.
3. a kind of cold drawing die for improving steel tube inner hole spiral defect according to claim 1, it is characterised in that：It is described to lead
Chute（1-5）Share 10.
4. a kind of cold drawing die for improving steel tube inner hole spiral defect according to claim 1, it is characterised in that：It is described outer
Mould（2）There are one cylindrical through-hole, external molds（2）The tapered face in through-hole one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721781397.8U CN207563449U (en) | 2017-12-19 | 2017-12-19 | A kind of cold drawing die for improving steel tube inner hole spiral defect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721781397.8U CN207563449U (en) | 2017-12-19 | 2017-12-19 | A kind of cold drawing die for improving steel tube inner hole spiral defect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207563449U true CN207563449U (en) | 2018-07-03 |
Family
ID=62685591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721781397.8U Withdrawn - After Issue CN207563449U (en) | 2017-12-19 | 2017-12-19 | A kind of cold drawing die for improving steel tube inner hole spiral defect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207563449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107891068A (en) * | 2017-12-19 | 2018-04-10 | 王家聪 | Improve the cold drawing die of steel tube inner hole spiral defect |
-
2017
- 2017-12-19 CN CN201721781397.8U patent/CN207563449U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107891068A (en) * | 2017-12-19 | 2018-04-10 | 王家聪 | Improve the cold drawing die of steel tube inner hole spiral defect |
| CN107891068B (en) * | 2017-12-19 | 2023-11-24 | 王家聪 | Cold drawing die for improving spiral defect of inner hole of steel pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180703 Effective date of abandoning: 20231124 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180703 Effective date of abandoning: 20231124 |