CN104772358A - Metal alternative extrusion forming device and method - Google Patents
Metal alternative extrusion forming device and method Download PDFInfo
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- CN104772358A CN104772358A CN201510208534.8A CN201510208534A CN104772358A CN 104772358 A CN104772358 A CN 104772358A CN 201510208534 A CN201510208534 A CN 201510208534A CN 104772358 A CN104772358 A CN 104772358A
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Abstract
The invention relates to a metal alternative extrusion forming device and method and relates to a labor-saving extrusion forming device and method. The device and method solve the problems that according to an existing extrusion forming device and method, needed energy consumption is large, flowing uniformity is poor, and the material utilizing rate is low. According to the scheme of the device, an extrusion container is arranged on a base, a core die is arranged at the bottom of the extrusion container, blanks are arranged in the extrusion container and located above the core die, and one end of a first punch and one end of a second punch are arranged in the extrusion container and abut against the upper end faces of the blanks. According to the scheme of the method, the core die, the blanks, the first punch and the second punch are sequentially placed in the extrusion container; the second punch is fixed, the first punch moves downwards by the distance of L, and metal on the lower side of the first punch is extruded and deformed and is sequentially extruded and formed; then the first punch is fixed, the second punch moves downwards by the distance of 2L, and the blanks below the second punch are made to be extruded and formed. According to the acting sequence, the first punch and the second punch alternatively move downwards for loading till the blanks are totally extruded. The device and method are used for metal forming.
Description
Technical field
The present invention relates to a kind of metallic extrusion molding device and method, be specifically related to a kind of laborsaving extrusion molding apparatus and method.
Background technology
Reducing energy consumption, improving product properties is the general character problem in science that current extrusion manufacture field crowd pays close attention to.For a long time, the conventional method improving squeezing flow behavior is limited to the single optimization to technological parameter more, although have certain effect from macroscopic perspective, this inherently can not prevent the generation of extrusion defect and the improvement of product properties.
Backward extrusion is one comparatively labour-saving manufacturing process.Klaus B.M ü ller etc. proposes a kind of active friction extrusion that friction is had a positive effect, and be studied by test, result shows: in the starting stage of crimp, the load capacity that only need be equivalent to maximum distortion power 38% can realize common backward extrusion, and the extruding force of starting stage has been reduced to 18% of full payload, and by improving extruding condition, production efficiency can improve 8 ~ 10%.The uniformity of metal deformation flow in extrusion process can be improved significantly, and then improve the quality and performance of goods.At present, though active friction extrusion has research, because its technique own characteristic limit, that applies in production practices is relatively less.
Subsequently, another kind can realize labour-saving extrusion technique-shear extrusion and be suggested, and it is a special area of cup bar extrusion, is also the popularization carrying out cup bar extrusion pressure situation in the essence mode of rushing.The geometrical condition that " cutting crowded " occurs is: first must meet the diameter that convex mould diameter is not more than branch position, the simultaneously suitable relation of ratio of height to diameter of the ingot and punch and blank diameter ratio, realized by the size changing the fabrication hole degree of depth, and with whether meet and do not occur instead to squeeze as foundation, namely ensure that the punch starting stage just extends into die cavity outlet position distortion, the method has certain technical advantage at branch class A of geometric unitA such as manufacture valve bodies.
By applying twist motion to the tool and mould in extrusion process, effectively can change the mode of action of frictional force, reaching laborsaving and the object of modification.Sergeev proposes extrusion forming technology drift being applied to twisting action, and the method can change the distribution of blank and tool and mould Contact stress, significantly reduces shaping load.But it is as bar class instrument, as applied the coupling of moment of torsion and axial compression simultaneously, higher to the requirement of drift overall performance.Loginov etc. adopt the mode of action to core during extrusion molding applies to rotate to be studied.The method can change the action direction of frictional force between blank and mould when being shaped, and makes blank only need the one-component overcoming original frictional resistance to be extruded shaping, therefore, significantly reduces shaping load.Correlative study result shows: apply to rotate except reducing except shaping load to core, can also improve tissue and the mechanical property of extruded product.
But core applies rotary extrusion forming technology and is only applicable to circular section section bar, for product with odd-shaped cross section, axial streamline will inevitably be caused along " cut-out " of profile direction; Meanwhile, because of the change of core mouth place friction condition, make the distribution of this place's additional stress become more complicated, add the flow velocity inhomogeneities extruding metal and the possibility producing warping defects on the contrary, the desirability of production practical application cannot be met.As applied to rotate to die, an above-mentioned difficult problem will be readily solved, and for this reason, the extrusion forming method that die applies twisting action is suggested immediately.Because die and blank contact area are comparatively large, the effect reducing extruding energy consumption will be more remarkable.
Along with the raising day by day to demands such as goods combination property and application extensions, the innovative research for conventional extrusion technology is still continuing in depth to launch; Meanwhile, shape/property integration accuracy controlling is one of the important directions and trend of extrusion forming technology development, to effectively enhancing productivity, stock utilization and expand in the range of application of this technology in production reality etc. and have immeasurable meaning.
Summary of the invention
The object of this invention is to provide a kind of metallic extrusion molding device and method, for solving the required problem that energy consumption is large, flow uniformity is poor, stock utilization is low in current extrusion molding apparatus and method.
The present invention solves the problems of the technologies described above the technical scheme taked to be: device scheme: described device comprises the first drift, the second drift, recipient, core and base, recipient is located on base, core is located at the bottom of recipient, blank to be located in recipient and to be positioned at the top of core, and one end of the first drift and the second drift is located in recipient and the upper surface leaned at blank.
Method scheme: described method comprises the steps: step one, is fixed on press bench by base; Step 2, recipient is placed on the top of base;
Step 3, in recipient, put into core, blank, the first drift and the second drift successively;
Step 4, to fix the second drift motionless, and the first drift moves down distance for L, and metal compressive deformation on the downside of it is also extruded shaping in turn;
Step 5, now fix the first drift again, the second drift moves down distance for 2L, and impel its lower square billet to be extruded into shape, being a loading cycle completes;
Step 6, according to as above sequence of operation, first drift and the alternately descending loading of the second drift, until blank is extruded completely, now two drifts are all positioned at bottom recipient, being is shaped terminates, in alternately extrusion process, in each drift single pass, drafts scope is that the 5 ~ 25%, first drift of blank entire length extrusion speed descending with the second drift is consistent.
Beneficial effect of the present invention: apparatus of the present invention tool has the following advantages: breach in conventional metals extrusion tooling structure manufacturing process, drift is overall design concept, is made into Split type structure form; All adopt during conventional metals extrusion molding that drift is overall descendingly executes stressed fixing loading mode to blank, the present invention adopts the split drift alternately descending loading of substep of more than two halves or two halves.
The inventive method tool has the following advantages: when different split drift alternately loads, obviously reduce compared to the actual loaded active area of drift in conventional extruded forming process, therefore, reduce the true extrusion ratio in each loading passage, the flow uniformity extruding metal significantly improves, extrusion load decreases, and the range of decrease can reach about 30% ~ 70%;
When drift alternately loads step by step, due to the change of stress condition, die bottom comer metal also can produce the trend of Deformation Flow to die orifice, so remarkable reduction even eliminates dead band defect, and stock utilization improves 10% ~ 40% thereupon;
Split drift replaces in descending loading procedure, and between different drift, interface place creates violent detrusion, causes the degree of depth refinement of blank interior tissue, causes mechanical property to change thereupon;
In extrusion process, achieve the two ore control of shape and performance, and without the need to independent fine grain treatment operation, the object of integrated accuracy controlling in short route, can be reached.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention, Fig. 2 be arrange about two drifts and cross section ratio is not 1 time structural representation, the structural representation that Fig. 3 is two drifts when being inside and outside, Fig. 4 is manufacturing process flow chart of the present invention, Fig. 5 is drift cross section ratio pressing method flow chart when not being 1, Fig. 6 is manufacturing process flow chart when arranging inside and outside drift.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1 illustrates present embodiment, the device of present embodiment comprises the first drift 1, second drift 2, recipient 3, core 5 and base 6, recipient 3 is located on base 6, core 5 is located at the bottom of recipient 3, blank 4 to be located in recipient 3 and to be positioned at the top of core 5, and one end of the first drift 1 and the second drift 2 to be located in recipient 3 and to lean in the upper surface of blank 4.
Detailed description of the invention two: composition graphs 1 illustrates present embodiment, first drift 1 of present embodiment and the second drift 2 are set up in parallel, first drift 1 is highly identical with the second drift 2, the cross section of the first drift 1 and the second drift 2 is arc and two cross sections form the circle matched with recipient, the alternately descending loading being convenient to enforcement two drifts is set about drift, the shaping load in extrusion process can be reduced, the detrusion at interface place impels the raising of the refinement of the crystal grain degree of depth and mechanical property, analyzes the benefit that left and right is arranged.Other embodiment is identical with detailed description of the invention one.
Detailed description of the invention three: composition graphs 1 illustrates present embodiment, the first drift 1 of present embodiment and the cross section ratio of the second drift 2 are 1:1, and during this kind of ratio, load shedding effect is the most remarkable.Other embodiment is identical with detailed description of the invention one.
Detailed description of the invention four: composition graphs 2 illustrates present embodiment, first drift 1 of present embodiment and the cross section ratio range of the second drift 2 are 0.3 ~ 1, and the detrusion that asymmetric set-up mode can make thin brilliant position needed for blank replace descending realization by two drifts realizes the refinement of the crystal grain degree of depth.Other embodiment is identical with detailed description of the invention one.
Detailed description of the invention five: composition graphs 3 illustrates present embodiment, second drift 2 of present embodiment is cylindrical shape, first drift 1 is arranged in the second drift 2, the cross section ratio of the first drift 1 and the second drift 2 is 0.3 ~ 1, the inside and outside mode arranged can enlarge markedly the active area shearing position, makes it be transformed into ring surface pattern by the single plane paralleled to the axis.Other embodiment is identical with detailed description of the invention one.
Detailed description of the invention six: composition graphs 4 ~ Fig. 6 illustrates present embodiment, the method for present embodiment comprises the steps: step one, is fixed on press bench by base 6; Step 2, recipient 3 is placed on the top of base 6;
Step 3, in recipient 3, put into core 5, blank 4, first drift 1 and the second drift 2 successively;
Step 4, to fix the second drift 2 motionless, and the first drift 1 moves down distance for L, and blank 4 compressive deformation on the downside of it is also extruded shaping in turn;
Step 5, now fix the first drift 1, second drift 2 again and move down distance for 2L, impel its lower square billet 4 to be extruded shaping, being a loading cycle completes;
Step 6, according to as above sequence of operation, the first drift 1 and the alternately descending loading of the second drift 2, until extruded completely by blank 4, now the first drift 1 and the second drift 2 are all positioned at bottom recipient 3, and being is shaped terminates.Alternately in extrusion process, in each drift single pass, drafts scope is that the 5 ~ 25%, first drift 1 of blank entire length extrusion speed alternately descending with the second drift 2 is consistent.Other embodiment is identical with detailed description of the invention one.
Claims (6)
1. a metal replaces extrusion molding apparatus, it is characterized in that described device comprises the first drift (1), the second drift (2), recipient (3), core (5) and base (6), recipient (3) is located on base (6), core (5) is located at the bottom of recipient (3), blank (4) to be located in recipient (3) and to be positioned at the top of core (5), and one end of the first drift (1) and the second drift (2) is located at the interior and upper surface leaned in blank (4) of recipient (3).
2. metal replaces extrusion molding apparatus according to claim 1, it is characterized in that the first drift (1) is set up in parallel with the second drift and the two is highly identical, the cross section of the first drift (1) and the second drift (2) is arc and two cross sections form the circle matched with recipient.
3. metal replaces extrusion molding apparatus according to claim 2, it is characterized in that the cross section ratio range of the first drift (1) and the second drift (2) is 0.3 ~ 1.
4. metal replaces extrusion molding apparatus according to claim 2, it is characterized in that the cross section ratio of the first drift (1) and the second drift (2) is 1:1.
5. metal replaces extrusion molding apparatus according to claim 1, it is characterized in that the second drift (2) is cylindrical shape, first drift (1) is arranged in the second drift (2) and the two is highly identical, and the cross section ratio range of the first drift (1) and the second drift (2) is 0.3 ~ 1.
6. adopt metal described in claim 1 to replace an extrusion molding apparatus, it is characterized in that described method comprises the steps: step one, is fixed on press bench by base (6); Step 2, recipient (3) is placed on the top of base (6);
Step 3, in recipient (3), put into core (5), blank (4), the first drift (1) and the second drift (2) successively;
Step 4, to fix the second drift (2) motionless, and the first drift (1) moves down distance for L, and blank (4) compressive deformation on the downside of it is also extruded shaping in turn;
Step 5, now fix the first drift (1) again, the second drift (2) moves down distance for 2L, and impel its lower square billet (4) to be extruded shaping, being a loading cycle completes;
Step 6, according to as above sequence of operation, first drift (1) and the second drift (2) alternately descending loading, until blank (4) is extruded completely, now the first drift (1) and the second drift (2) are all positioned at recipient (3) bottom, and being is shaped terminates.Alternately in extrusion process, in each drift single pass, to be that the 5 ~ 25%, first drift (1) of blank entire length and the second drift (2) replace descending extrusion speed consistent for drafts scope.
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| CN201510208534.8A CN104772358B (en) | 2015-04-28 | 2015-04-28 | Metal replaces extrusion molding apparatus and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064181A (en) * | 2016-06-22 | 2016-11-02 | 重庆大学 | The accumulation pressurizing unit of a kind of sheet material severe plastic deformation and using method thereof |
| CN107377653A (en) * | 2017-09-22 | 2017-11-24 | 南昌航空大学 | The flat prod cast of extruding metal |
| CN107604207A (en) * | 2017-11-16 | 2018-01-19 | 宁波兴业盛泰集团有限公司 | A kind of aluminium White brass alloy of highly conductive high intensity and preparation method thereof |
| CN107649529A (en) * | 2017-03-16 | 2018-02-02 | 哈尔滨理工大学 | Bent member mistake is away from extrusion molding apparatus and method |
| CN110508635A (en) * | 2019-08-27 | 2019-11-29 | 太原理工大学 | A kind of asymmetric reciprocating extrusion device and processing method with separate type punch-pin |
| CN114682639A (en) * | 2017-05-10 | 2022-07-01 | 帝国理工学院创新有限公司 | Method of forming a bent length of an extruded profile/section of a metal alloy |
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| JPS57109520A (en) * | 1980-12-27 | 1982-07-08 | Kobe Steel Ltd | Container cleaning method for indirect extrusion press |
| US20040231391A1 (en) * | 2001-07-11 | 2004-11-25 | Diethelm Wompner | Method for extruding a profile or a similar billet from a bolt or bar and corresponding device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106064181A (en) * | 2016-06-22 | 2016-11-02 | 重庆大学 | The accumulation pressurizing unit of a kind of sheet material severe plastic deformation and using method thereof |
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| CN107649529A (en) * | 2017-03-16 | 2018-02-02 | 哈尔滨理工大学 | Bent member mistake is away from extrusion molding apparatus and method |
| CN114682639A (en) * | 2017-05-10 | 2022-07-01 | 帝国理工学院创新有限公司 | Method of forming a bent length of an extruded profile/section of a metal alloy |
| CN107377653A (en) * | 2017-09-22 | 2017-11-24 | 南昌航空大学 | The flat prod cast of extruding metal |
| CN107604207A (en) * | 2017-11-16 | 2018-01-19 | 宁波兴业盛泰集团有限公司 | A kind of aluminium White brass alloy of highly conductive high intensity and preparation method thereof |
| CN110508635A (en) * | 2019-08-27 | 2019-11-29 | 太原理工大学 | A kind of asymmetric reciprocating extrusion device and processing method with separate type punch-pin |
| CN110508635B (en) * | 2019-08-27 | 2021-07-30 | 太原理工大学 | Asymmetric reciprocating extrusion device with separated male die and machining method |
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| CN104772358B (en) | 2017-03-29 |
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Effective date of registration: 20200727 Address after: 350000 Tongyang 217, Dongtai Village, Qingkou Town, Minhou County, Fuzhou City, Fujian Province Patentee after: FUJIAN XIANGXIN SHARES Co.,Ltd. Address before: 150080 Harbin, Heilongjiang, Nangang District Road, No. 52 Patentee before: HARBIN University OF SCIENCE AND TECHNOLOGY |
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Denomination of invention: Metal alternating extrusion forming device and method Effective date of registration: 20220218 Granted publication date: 20170329 Pledgee: Bank of Communications Ltd. Fujian branch Pledgor: FUJIAN XIANGXIN SHARES Co.,Ltd. Registration number: Y2022350000022 |
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