CN103611751A - Warm extrusion method and mould for continuous equal-square channel with pre-stress structure - Google Patents
Warm extrusion method and mould for continuous equal-square channel with pre-stress structure Download PDFInfo
- Publication number
- CN103611751A CN103611751A CN201310607491.1A CN201310607491A CN103611751A CN 103611751 A CN103611751 A CN 103611751A CN 201310607491 A CN201310607491 A CN 201310607491A CN 103611751 A CN103611751 A CN 103611751A
- Authority
- CN
- China
- Prior art keywords
- mould
- die
- square
- extrusion
- warm extrusion
- 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
Images
Abstract
The invention discloses a warm extrusion method and a mould for a continuous equal-square channel with a pre-stress structure. The structural characteristics are that a reversed-bell-shaped double-layered combined concave mould pre-stress structure is adopted so that not only can mould materials be utilized effectively, but the bearing capability can also be guaranteed. The warm extrusion method comprises the following steps: analyzing a warm extrusion process of the continuous equal-square channel through finite elements by a continuous equal-square channel to obtain an optimized mould geometrical shape and a technological parameter; designing a warm extrusion experiment mould of the continuous equal-square channel according to basic requirements of low-carbon steel extrusion and molding; and improving a regular structure of a concave mould. The strength and the service life of a convex mould are not only considered in the aspect of the used materials, but also are guaranteed in the aspect of the structural design of the convex mould. With the adoption of the warm extrusion method and mould, the concave mould can be effectively prevented from being fractured; the service life of the mould is prolonged and the efficiency of experiment researches is improved; the time and the money are saved.
Description
Technical field
The present invention relates to a kind of continuous square duct temperature extension mould that waits, especially relate to a kind of employing and fall bell double-deck combined die prestressed structure, that greatly improves die life waits square duct temperature extension mould simultaneously.
Background technology
Traditional warm extrusion technology such as square duct such as grade is the pipeline that makes two angled iso-cross-sections of square extrusion Multiple through then out under drift effect, thereby accumulates enough equivalent strains, reaches the object of grain refinement.
Yet extremely severe Deng square duct extrusion process condition of work, therefore, the extruding that realizes in advance hard material under normal temperature will propose higher requirement to mould and die accuracy, intensity, rigidity and life-span.According to requirement of experiment, by square duct Warm Extrusion processes such as finite element analyses, obtained mould geometry and the technological parameter optimized, by the basic demand of mild steel extrusion molding, designed and waited square duct Warm Extrusion experiment mould; Die and punch are to extrude the parts with ultra-fine grain structural material most critical, therefore in design process, should take into full account.
Because die deformation condition is extremely severe, and the conventional structure of die need to improve, and for effectively utilizing mold materials and guaranteeing its bearing capacity, selects prestressing combination cavity die structure.Because the size of punch is affected by the physical dimension of square extrusion, thus the intensity of punch and life-span not only to consider from material used, more to guarantee from the structural design of punch.But be violent plastic deformation owing to waiting square duct warm extrusion technology, therefore, this technique is higher to mould and die accuracy, intensity, rigidity and life-span requirement, adopt traditional square duct temperature extension mould that waits to tend to the phenomenon that occurs that die breaks, the progress that has delayed experimental study and process exploitation, has wasted a large amount of time and moneys.
Summary of the invention
The object of the invention is: for the technical problem of above-mentioned existence, provide a kind of structure with two_layer pre_stress combined matrix, this structure can greatly improve die life, realize the warm extrusion technology such as square duct such as grade of ferrous metal.
For solving above-mentioned technical matters, technical scheme of the present invention is: die adopts double-deck combined die prestressed structure.Die is divided into two parts to be made, and for fear of the larger phenomenon of square extrusion burr, prestressing force lasso and die adopt down bell interference fit, and excessive swollen mould or the excessive phenomenon of burr of causing of die cavity expansive force in extrusion process can be effectively avoided in above-mentioned measure.Pushing concrete implementation step is
1. utilize line cutting technology that material is cut into diameter for 10mm, the sample that length is 83mm, and sample is carried out to full annealing;
2. before square extrusion being put into die cavity, first mould is lubricated fully, put into after square extrusion, mould and square extrusion are preheating to uniform temperature simultaneously;
3. after having pushed, square shaped extrusion carries out stress relief annealing.
The invention has the beneficial effects as follows: waiting square duct bent angle extrusion process is violent plastic history, in extrusion process, mould will bear higher die cavity tension, therefore, Deng square duct warm extrusion technology, mould strength is had to higher requirement, some originally can cold-extruded material but adopted hot extrude or warm extrusion, yet temperature raises and has also caused a series of variation, there is growing up as crystal grain, the phenomenons such as scaling loss, be unfavorable for preparing block super fine crystal material, in actual process, die life is very low simultaneously.Therefore, on finite element analysis basis, wait square duct temperature extension mould design can effectively improve the intensity of mould, make the mould of design can meet the resistance of deformation of cold extrusion material, the deformation characteristics of square duct warm extrusion technology such as can meet again.The mould by improvement with prestressed structure, has realized the cold-extrusion technology that waits square duct bent angle ferrous metal, has widened the scope that waits square duct Warm Extrusion metal.
Accompanying drawing explanation
Fig. 1 is the square extrusion assay maps such as of the present invention.
Fig. 2 is assembly drawing of die of the present invention.
Fig. 3 is the prestressing combination cavity die structure in Fig. 2.
Fig. 4 is squeezing passage design details skill in prestressing combination die in Fig. 3.
Being labeled as in above-mentioned figure:
A kind of 1. lower bolster 2. guide pillar 3. soket head cap screw 4. guide pin bushing 5. cope match-plate pattern 6. punch retainer 7. setting circle pin 8. convex mould pad 9. soket head cap screw 10. punch 11. die pressing plate 12. die gland 13. die 14. cushion block 15. die backing plates that wait square duct Warm Extrusion extrusion die installation diagram with prestressing combination cavity die structure of Fig. 2.
The specific embodiment
From the prestressing combination cavity die structure of assembly drawing of die of the present invention, Fig. 2 shown in Fig. 2 and the prestressing combination die of Fig. 3, squeezing passage design details skill can be found out, the present invention mainly contains the compositions such as 1. lower bolster 2. guide pillar 3. soket head cap screw 4. guide pin bushing 5. cope match-plate pattern 6. punch retainer 7. cushion block 8. setting circle pin 9. convex mould pad 10. soket head cap screw 11. punch 12. die pressing plate 13. second layer die gland 14. ground floor die gland 15. die 16. die backing plates.In extrusion process, first extrusion experiment material therefor is passed through to line cutting stock, then by cutting process, being processed into diameter is 10mm, length is the sample of 80mm, after annealing in process, putting into a kind of square duct Warm Extrusion extrusion die that waits with prestressing combination cavity die structure pushes, Deng the design of square duct temperature extension mould, be different from conventional cold extrusion die, prodigiosin such as warm-extrusion die such as square duct such as grade of the present invention is realized square extrusion side direction and is extruded continuously, need in combined die and prestressing force lasso, process square extrusion and extrude passage.At mould, complete after a crush stroke, square extrusion is put into die cavity again and push, so repeatedly can extrude continuously square extrusion.Owing to adopting prestressing combination cavity die structure, be improved die life, improved success rate and the extruding efficiency of experiment.
Die corner type cavity configuration of the present invention, the prestressed structure of falling bell; all can adopt prior art; the present invention is not limited to above-mentioned cited concrete form of implementation; all those skilled in the art, without the getable improvement of creative work, all belong in protection scope of the present invention.
Equipment required for the present invention is punching machine or hydraulic press.
Claims (3)
1. continuous square duct Warm Extrusion method and the mould of waiting with prestressed structure comprises as lower component: a lower bolster, guide pillar, soket head cap screw, guide pin bushing, cope match-plate pattern, punch retainer, cushion block, setting circle pin, convex mould pad, soket head cap screw, punch, die pressing plate, second layer die gland ground floor die gland, die and die backing plate, is characterized in that:
(a) this mould adopts double-deck combined die prestressed structure, adopts the prestressed structure of interference fit can increase substantially mould strength, can realize repeatedly extruding of square blank material, and then obtains the material with nanometer microstructure;
(b) ECAP mould of the present invention can be realized square extrusion side direction and extrudes continuously, processes square extrusion and extrude passage in combined die and prestressing force lasso;
At mould, complete after a crush stroke, square extrusion is put into die cavity again and push, so repeatedly can extrude continuously square extrusion;
(c) pre-stress die value of interference fit and physical dimension: D=275mm, d1=150mm, u1=0.984, d2=(2.45～3.25) d==223.75mm, considers gland perforate, d2=230mm, u2==0.4674, u is d place radial interference amount.
2. a kind of continuous square duct Warm Extrusion method and mould of waiting with prestressed structure according to claim 1, it is characterized in that: die is divided into two parts to be made, the cavity structure having due to mould is two angled iso-cross-section pipelines, is divided into two parts makes for the ease of processing die.
3. a kind of continuous square duct Warm Extrusion method and mould of waiting with prestressed structure according to claim 1, it is characterized in that: for fear of the larger phenomenon of square extrusion burr, prestressing force lasso and die adopt down bell interference fit, along with the increase of extruding force can effectively increase the magnitude of interference of mould, improve prestressing force, improve die life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607491.1A CN103611751A (en) | 2013-11-27 | 2013-11-27 | Warm extrusion method and mould for continuous equal-square channel with pre-stress structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607491.1A CN103611751A (en) | 2013-11-27 | 2013-11-27 | Warm extrusion method and mould for continuous equal-square channel with pre-stress structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103611751A true CN103611751A (en) | 2014-03-05 |
Family
ID=50162485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310607491.1A Pending CN103611751A (en) | 2013-11-27 | 2013-11-27 | Warm extrusion method and mould for continuous equal-square channel with pre-stress structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103611751A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384225A (en) * | 2014-12-10 | 2015-03-04 | 太原理工大学 | Equal-channel shear extrusion mold and molding method |
| CN106011514A (en) * | 2016-06-21 | 2016-10-12 | 山东建筑大学 | Ultra-high-strength Ti-based composite material preparation method by repeated equal-channel 45-degree equal-channel angular pressing |
| CN107808064A (en) * | 2017-11-22 | 2018-03-16 | 武汉理工大学 | The Optimization Design of the short route extrusion forming process of blast-furnace tuyere front end cap body |
| CN108251694A (en) * | 2018-03-20 | 2018-07-06 | 山东建筑大学 | A kind of method for preparing the porous dental materials of nanoscale medical Ti-Ni-Cr |
-
2013
- 2013-11-27 CN CN201310607491.1A patent/CN103611751A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384225A (en) * | 2014-12-10 | 2015-03-04 | 太原理工大学 | Equal-channel shear extrusion mold and molding method |
| CN104384225B (en) * | 2014-12-10 | 2016-03-23 | 太原理工大学 | One waits passage shear extrusion mould and manufacturing process |
| CN106011514A (en) * | 2016-06-21 | 2016-10-12 | 山东建筑大学 | Ultra-high-strength Ti-based composite material preparation method by repeated equal-channel 45-degree equal-channel angular pressing |
| CN106011514B (en) * | 2016-06-21 | 2017-12-12 | 山东建筑大学 | The method that the isochannel repeated extruding in 45 ° of turnings prepares superhigh intensity titanium matrix composite |
| CN107808064A (en) * | 2017-11-22 | 2018-03-16 | 武汉理工大学 | The Optimization Design of the short route extrusion forming process of blast-furnace tuyere front end cap body |
| CN108251694A (en) * | 2018-03-20 | 2018-07-06 | 山东建筑大学 | A kind of method for preparing the porous dental materials of nanoscale medical Ti-Ni-Cr |
| CN108251694B (en) * | 2018-03-20 | 2023-04-18 | 山东建筑大学 | Method for preparing nano-scale medical Ti-Ni-Cr porous tooth material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103611751A (en) | Warm extrusion method and mould for continuous equal-square channel with pre-stress structure | |
| CN103639227A (en) | Die and method for manufacturing ultrathin-wall small cylinder part | |
| CN103192022A (en) | Cold heading manufacturing method for tor-shear type bolt | |
| CN101614112A (en) | Integrally-weighted drilling rod and production and processing method thereof | |
| Kukhar et al. | The selection of options for closed-die forging of complex parts using computer simulation by the criteria of material savings and minimum forging force | |
| CN103639223A (en) | Continuous equal circular channel warm extrusion method and die with prestressed structure | |
| CN103624509A (en) | Large plastic deformation method for achieving titanium alloy low-temperature superplasticity | |
| CN107649629A (en) | Larger ratio of height to diameter magnesium alloy bar eliminates anisotropic big plastic deformation blank-making method | |
| CN103878195B (en) | Magnesium alloy plate extruding formation process | |
| CN102343388A (en) | Hot extrusion manufacturing method for multi-hole circular taper hole anchor plate | |
| CN107442587A (en) | A kind of seamless steel pipe processing drawbench | |
| CN100506415C (en) | Roller type cavity die extrusion molding method | |
| CN103060730A (en) | Preparation method of aluminum alloy with excellent comprehensive property | |
| CN102921873A (en) | Method for machining flange shaft of motorcycle | |
| CN103394542B (en) | Rare earth magnesium alloy extrusion method | |
| CN103602937B (en) | A kind of method prepared by high performance high-density tungsten alloy material | |
| CN204657375U (en) | Cold extrusion combined die | |
| CN103350121B (en) | Method for processing cup-shaped thin-walled member by using cold extrusion process | |
| CN202238999U (en) | One-time hot extrusion semi-axis sleeve forming die | |
| Song et al. | Numerical simulation and experiments of precision bar cutting based on high speed and restrained state | |
| CN203380207U (en) | Rare-earth magnesium alloy pressing die | |
| CN205629227U (en) | A cut -out assembling die for having more production of anchor point steel fibre | |
| CN202877371U (en) | Punch structure for stamping die | |
| CN104227362A (en) | Manufacturing method of clutch shaft | |
| Su et al. | Researches of warm extrusion forming technology and property on 42CrMo steel cutting pick |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140305 |