CN108405623A - A method of Mannesmann effect is studied by rotary compression - Google Patents
A method of Mannesmann effect is studied by rotary compression Download PDFInfo
- Publication number
- CN108405623A CN108405623A CN201810172323.7A CN201810172323A CN108405623A CN 108405623 A CN108405623 A CN 108405623A CN 201810172323 A CN201810172323 A CN 201810172323A CN 108405623 A CN108405623 A CN 108405623A
- Authority
- CN
- China
- Prior art keywords
- blank
- rotary compression
- mannesmann
- mannesmann effect
- effect
- 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.)
- Granted
Links
- 230000006835 compression Effects 0.000 title claims abstract description 45
- 238000007906 compression Methods 0.000 title claims abstract description 45
- 230000000694 effects Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000011160 research Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000000155 melt Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- -1 ferrous metals Chemical class 0.000 claims 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 12
- 239000000956 alloy Substances 0.000 description 12
- 238000005242 forging Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Forging (AREA)
Abstract
A method of Mannesmann effect is studied by rotary compression, is included the following steps：1), according to needed for research contents, determining that blank and size, blank one end be drilled with blind hole；2) blank, is heated to experimental temperature in heating furnace；3) blank after, being heated on a hydraulic press to step 2) according to the parameter of setting and method carries out rotary compression, the method that the present invention passes through rotary compression blank, by controlling reduction in pass, measure the deformation of blind hole diameter and blank end, observe the Mannesmann effect under blank different distortion amount, by using this stabilization, swaging technology simple to operation, with unique advantage, closer to the deformation principle of roll piercing, the Mannesmann effect during roll piercing is more accurately probed into.
Description
Technical field
The present invention relates to roll piercing processing technique fields, more particularly to a kind of to study Mannesmann's effect by rotary compression
The method answered.
Background technology
During oblique milling, Mannesmann effect (forging and pressing effect) refers to blank during rotary compression repeatedly, the heart
The phenomenon that tensile stress that portion generates can be substantially reduced the deformation drag of perforation.Due to Mannesmann's effect during roll piercing
It should not yet study clear, easily occur top serious wear in perforation procedure, temperature in deformation process rises excessively high, or even can be more than
100-200 DEG C, the problems such as microstructure of acquisition is undesirable.
It is current studies have shown that being to pass through skew rolling mill mostly for the research of the Mannesmann effect during roll piercing
What experiment was completed, but this method is higher to equipment requirement, and the Mannesmann effect under small deformation amount can not be observed.For carbon steel
The research majority of Mannesmann effect tested by shallow pass to observe heart check, but only effective for continuous casting billet, forging stock
Fail to observe the appearance of crackle with strip plate, therefore crackle is not unique characterization of Mannesmann effect, how to be observed graceful
The tensile stress that Mannesmann effect is provided is the content for needing to study at present.Likewise, in the forging process of solid steel ingot
It will appear Mannesmann effect, but this method is only axially compressed motion process, it is larger with oblique milling process variances.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide one kind studied by rotary compression it is graceful
The method of Mannesmann effect observes the deformation of blind hole diameter and blank end by the method for rotary compression blank, it was demonstrated that
During roll piercing, blank center portion there are Mannesmann effects.
In order to achieve the above object, the technical solution adopted by the present invention is：
A method of Mannesmann effect is studied by rotary compression, is included the following steps：
Step 1：
Blank type and size are determined according to research contents as research object using cylindrical blank, in blank one end
Face center is drilled with blind hole, the tensile stress provided its object is to can more intuitively observe Mannesmann effect；
Step 2：
Blank is heated to experimental temperature in heating furnace；
Step 3：
Between blank after being heated on a hydraulic press to step 2 according to the parameter of setting and method is placed on upper and lower mould, into
Row multi-pass rotary compression；
Step 4：
Rotary compression after two weeks, melts down benefit temperature, waits for that blank is reheated to after experimental temperature, repeat the behaviour in step 3
Make；
Step 5：
It, can be by the dilatation and blank end face of center portion aperture along vertical when accumulative deflection reaches 8%~15%
Upward difference in height analyzes the effect degree of its Mannesmann effect.
Further, in step 1, the material of blank be carbon constructional quality steel, high-alloy steel, titanium alloy, aluminium alloy or
Other nonferrous metal and alloys.
Further, heating temperature is 450 DEG C~1200 DEG C in step 2.
Further, in step 3, upper and lower mould is all made of flat-die, and wherein hydraulic press lower die holder is fixed, upper mold compression speed
For 2mm/s.
Further, single depression rate is 2%~3% in step 4, and it is 10% to add up deflection, every time after pressure deformation
Blank is rotated clockwise 15 °.
Further, the Mannesmann effect under different distortion amount can be directly observed in step 5.
The blank is respectively TC4 and 45 steel, and specification is 100 × 100mm of Φ；It is bored in blank end face center
There is the blind hole of 6 × 10mm of Φ.
The beneficial effects of the invention are as follows：
The present invention observes the deformation of blind hole diameter and blank end by the method for rotary compression blank, it was demonstrated that
During roll piercing, blank center portion there are Mannesmann effects.The tensile stress accumulated at blank center by it into
Eleven punch 11 can reduce top puncture resistance to a certain extent, reduce the Wen Sheng in perforation procedure, keep deformation process smooth
It carries out, finally obtains ideal heterogeneous microstructure.
Description of the drawings
Fig. 1 is that rotary compression tests schematic diagram.
Fig. 2 is the experiment original complexion of blank.
Fig. 3 is macroscopical complexion after TC4 rotary compressions.
Fig. 4 is macroscopical complexion after 45 steel rotary compressions.
Fig. 5 is TC4 rotary compressions rear end macroscopic view complexion.
Fig. 6 is 45 steel rotary compression rear end macroscopic view complexions.
Specific implementation mode
Narration in detail is made to the present invention with reference to embodiment.
A method of Mannesmann effect is studied by rotary compression, is included the following steps：
1) blank type and size, are determined according to research contents as research object using cylindrical blank；
2) blank, is heated to experimental temperature in heating furnace；
3) blank after, being heated on a hydraulic press to step 2) according to the parameter of setting and method carries out multi-pass rotation pressure
Contracting.
4), rotary compression after two weeks, melts down benefit temperature, waits for that blank is reheated to after experimental temperature, repeat in step 3)
Operation
5) dilatation that can be by center portion aperture, when accumulative deflection reaches 8%~15% and blank end face edge
Longitudinal difference in height analyzes the effect degree of its Mannesmann effect.
In step 1), blank is respectively TC4 (forging stock) and 45 steel (strip plate), and specification is 100 × 100mm of Φ；In blank
End face center is drilled with the blind hole of 6 × 10mm of Φ, and its object is to can more intuitively observe Mannesmann effect to be carried
The tensile stress of confession.
It is different according to material category in step 2), within the scope of 450 DEG C~1200 DEG C of heating temperature, the material packet of blank
It includes：Carbon constructional quality steel, high-alloy steel (containing stainless steel) and the nonferrous metal and alloys such as titanium alloy and aluminium alloy.
In step 3), upper and lower mould is all made of flat-die, and wherein hydraulic press lower die holder is fixed, and upper mold compression speed is 2mm/s.
Single depression rate is 3%~4% in step 4), and it is 10% to add up deflection.It is after pressure deformation that blank is suitable every time
Hour hands rotate 15 °, and accumulating compression melts down benefit temperature after two weeks, repeats the above process.
The Mannesmann effect under different distortion amount can be directly observed in step 5).
Embodiment 1
It is 100 × 100mm of Φ bars as original blank that machined method, which obtains size, on TC4 alloy forging stocks,
Blank end face center is drilled with the blind hole of 6 × 10mm of Φ.TC4 alloy heating temperatures are set as 980 DEG C.Hydraulic press lower die holder
Fixed, upper mold decrease speed is 2mm/s, and it is 4% to depress deformation rate every time, every time rotates clockwise blank after pressure deformation
15 °, accumulating compression melts down benefit temperature after two weeks, repeats the above process.
When accumulative deformation rate reaches 10%, i.e., after outer diameter is compressed to Φ 90mm by Φ 100mm, observe TC4 alloy blanks
Macro morphology, the center portion thereof position blind hole is apparent before comparing compression to be expanded.Its blind hole diameter is expanded by 6mm after the compression of TC4 alloys
12mm is arrived greatly, and enlarging rate reaches 100%.The longitudinal terminal surface macro morphology of TC4 alloy blanks is observed, twin drum deformation occurs.TC4
Alloy plays drum position away from edge 18mm, plays drum peak and differs 3mm with center portion extreme lower position.
Embodiment 2
Using 45 steel as blank, the machined size that obtains is the bar of 100 × 100mm of Φ on its forging stock, in base
Material end face center is drilled with the blind hole of 6 × 10mm of Φ.After chamber type electric resistance furnace is heated to 1200 DEG C, carry out on a hydraulic press
Rotary compression is tested, and experiment parameter and method are in the same manner as in Example 1.45 steel blanks after rotary compression, blind hole diameter by
6mm is expanded to 10mm, and enlarging rate reaches 80%；45 steel play drum position near surface, 5mm are differed with edge, bulging position is most
High point differs 9mm with center portion lowest point.
Cylindrical specimens are radially loaded as shown in Figure 1 and carry out multi-pass rotary compression experiment, every time rotation angle
Degree is 0 °, 45 °, 90 ° and 135 °.Rotary compression after two weeks, melts down benefit temperature, waits for that blank is reheated to after experimental temperature, weight
The multiple operation.It, can be by the dilatation and blank end face of center portion aperture along vertical when accumulative deflection reaches 8%~15%
Upward difference in height analyzes the effect degree of its Mannesmann effect.
It is illustrated in figure 2 experiment original blank used, specification is 100 × 100mm of Φ.In blank end face center
It is drilled with the blind hole of 6 × 10mm of Φ, the tensile stress provided its object is to can more intuitively observe Mannesmann effect.
Macroscopical complexion is illustrated in figure 3 after TC4 rotary compressions, and specific implementation method is shown in embodiment 1.TC4 alloys rotation pressure
The accumulative deformation rate of contracting is 10%, i.e. outer diameter is compressed to Φ 90m by Φ 100mm, and blind hole diameter is expanded to 12mm by 6mm, expanding
Rate reaches 100%.
Macroscopical complexion is illustrated in figure 4 after 45 steel rotary compressions, and specific implementation method is shown in embodiment 2.45 steel rotary compressions
Accumulative deformation rate be 10%, i.e. outer diameter is compressed to Φ 90m by Φ 100mm, and blind hole diameter is expanded to 10mm, enlarging rate by 6mm
Reach 80%.
It is illustrated in figure 5 the longitudinal terminal surface macro morphology of TC4 alloy blanks, it is observed that TC4 alloys are in rotary compression
Twin drum deformation occurs afterwards.TC4 alloys play drum position away from edge 18mm, play drum peak and differ 3mm with center portion extreme lower position.
45 steel rotary compression rear end macroscopic view complexions are illustrated in figure 6, the change of twin drum type equally occurs after rotary compression
Shape.45 steel play drum position near surface, and 5mm is differed with edge, and bulging position peak differs 9mm with center portion lowest point.
Claims (7)
1. a kind of method for studying Mannesmann effect by rotary compression, which is characterized in that include the following steps：
Step 1：
Blank type and size are determined according to research contents as research object using cylindrical blank, in blank end face
Heart position is drilled with blind hole, the tensile stress provided its object is to can more intuitively observe Mannesmann effect；
Step 2：
Blank is heated to experimental temperature in heating furnace；
Step 3：
Between blank after being heated on a hydraulic press to step 2 according to the parameter of setting and method is placed on upper and lower mould, carry out more
Passage rotary compression；
Step 4：
Rotary compression after two weeks, melts down benefit temperature, waits for that blank is reheated to after experimental temperature, repeat the operation in step 3；
Step 5：
When accumulative deflection reaches 8%~15%, can by the dilatation of center portion aperture and blank end face along longitudinal direction on
Difference in height analyze the effect degree of its Mannesmann effect.
2. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
The material for stating blank in step 1 is carbon constructional quality steel, high-alloy steel, titanium alloy, aluminium alloy or other non-ferrous metals and conjunction
Gold.
3. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
It is 450 DEG C~1200 DEG C to state heating temperature in step 2.
4. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
It states upper and lower mould in step 3 and is all made of flat-die, wherein hydraulic press lower die holder is fixed, and upper mold compression speed is 2mm/s.
5. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
It is 2%~3% to state single depression rate in step 4, and it is 10% to add up deflection, every time revolves blank clockwise after pressure deformation
Turn 15 °.
6. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
State the Mannesmann effect that can be directly observed in step 5 under different distortion amount.
7. a kind of method for studying Mannesmann effect by rotary compression according to claim 1, which is characterized in that institute
The blank stated is respectively TC4 and 45 steel, and specification is 100 × 100mm of Φ；Blank end face center be drilled with Φ 6 ×
The blind hole of 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810172323.7A CN108405623B (en) | 2018-03-01 | 2018-03-01 | A method of Mannesmann effect is studied by rotary compression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810172323.7A CN108405623B (en) | 2018-03-01 | 2018-03-01 | A method of Mannesmann effect is studied by rotary compression |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108405623A true CN108405623A (en) | 2018-08-17 |
| CN108405623B CN108405623B (en) | 2019-09-03 |
Family
ID=63129863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810172323.7A Expired - Fee Related CN108405623B (en) | 2018-03-01 | 2018-03-01 | A method of Mannesmann effect is studied by rotary compression |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108405623B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06513A (en) * | 1992-06-15 | 1994-01-11 | Nkk Corp | Piercing method for preventing inside surface flaw of seamless tube |
| WO2013041043A1 (en) * | 2011-09-22 | 2013-03-28 | 中国科学院金属研究所 | Forging method for high-efficiency closing of porous defects in steel ingots or billets |
| CN104907474A (en) * | 2014-11-03 | 2015-09-16 | 秦皇岛燕大现代集成制造技术开发有限公司 | Aluminum alloy wheel forging forming technology |
| CN106694768A (en) * | 2015-11-15 | 2017-05-24 | 内蒙古北方重工业集团有限公司 | Manufacturing method of H13 hollow core rod |
-
2018
- 2018-03-01 CN CN201810172323.7A patent/CN108405623B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06513A (en) * | 1992-06-15 | 1994-01-11 | Nkk Corp | Piercing method for preventing inside surface flaw of seamless tube |
| WO2013041043A1 (en) * | 2011-09-22 | 2013-03-28 | 中国科学院金属研究所 | Forging method for high-efficiency closing of porous defects in steel ingots or billets |
| CN104907474A (en) * | 2014-11-03 | 2015-09-16 | 秦皇岛燕大现代集成制造技术开发有限公司 | Aluminum alloy wheel forging forming technology |
| CN106694768A (en) * | 2015-11-15 | 2017-05-24 | 内蒙古北方重工业集团有限公司 | Manufacturing method of H13 hollow core rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108405623B (en) | 2019-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104191166B (en) | A kind of roll-forming method of aluminium alloy height cylinder thin-walled ring | |
| CN103691855A (en) | Method for rolling rectangular structural steel ring blank to form irregularly-shaped thin-walled ring part | |
| US10774411B2 (en) | Nickel-based alloy tubes and method for production thereof | |
| CN105328096A (en) | Forming method of die forging clamps made of titanium alloy | |
| CN103722107A (en) | Method of rolling titanium alloy rectangular ring blanks into special-shaped thin-walled rings | |
| RU2301845C1 (en) | Method of production of items from high-temperature wrought nickel alloy | |
| CN105382157A (en) | Forming method for large special-shaped structural steel multi-step ring piece | |
| EP2080571B1 (en) | Method and apparatus for producing a high-strength process material | |
| CN108405623B (en) | A method of Mannesmann effect is studied by rotary compression | |
| CN104607579A (en) | Rolling forming method for aluminium alloy thick wall ring forge piece | |
| CN109482791A (en) | A kind of C-shaped cross section ring centre embryo material preparation process | |
| CN103706736A (en) | Method for rolling aluminum alloy rectangular ring blank to form specially-shaped thin-wall ring | |
| CN103691854A (en) | Method for rolling cobalt-based high-temperature alloy rectangular ring blank into special-shaped thin-walled ring component | |
| CN106862863A (en) | A kind of preparation processing method of the ultra-thin titanium alloy shell of great diameter and long | |
| CN104550584A (en) | Roll forming method for cobalt-based superalloy thick-wall ring forgings | |
| CN104148550A (en) | Method for rolling iron-based high temperature alloy rectangular ring blank to form special-shaped thin wall ring piece | |
| CN112475180A (en) | Forging die and method for step shaft type forge piece | |
| CN112139417A (en) | Forging forming method of super-large deep blind hole shell | |
| RU2361687C1 (en) | Method of long-measuring blanks receiving with fine-grained structure | |
| CN109482792A (en) | A kind of C-shaped cross section centre embryo preparation process | |
| CN105382155A (en) | Roll forming method for alpha-beta two-phase titanium alloy thick-wall ring forged piece | |
| CN104550586A (en) | Rolling and forming method for iron-based high-temperature alloy thick-walled ring forging | |
| CN115055617A (en) | Integral hot-working forming method for oil cylinder | |
| CN104624879B (en) | The roll-forming method of bearing steel heavy wall ring forging | |
| CN103658168A (en) | Method for rolling rectangular die block steel ring blank into abnormal-shaped thin-wall ring member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190903 |