CN102839265A - Preparation device for fine crystal bar stock and method - Google Patents
Preparation device for fine crystal bar stock and method Download PDFInfo
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- CN102839265A CN102839265A CN2012103603463A CN201210360346A CN102839265A CN 102839265 A CN102839265 A CN 102839265A CN 2012103603463 A CN2012103603463 A CN 2012103603463A CN 201210360346 A CN201210360346 A CN 201210360346A CN 102839265 A CN102839265 A CN 102839265A
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- friction head
- crystal bar
- bar material
- thin crystal
- cavity
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Abstract
The invention discloses a preparation device for a fine crystal bar stock, which comprises a friction head and a driving device thereof, wherein a cylindrical cavity is arranged at the top of the friction head; a horn-shaped cavity is arranged at the bottom of the friction head; the cylindrical cavity is communicated with the horn-shaped cavity; and a thread slot is arranged at the bottom of the friction head and is used for rolling plastic metal into an axis and accumulating in the horn-shaped cavity. The preparation device provided by the invention has the advantages that: (1) the fine crystal bar stock is conveniently prepared through high-temperature friction and extrusion between the friction head and the panel veneer; (2) the friction head has a simple structure and is simple to operate; after the plastic metal enters into the cavity in the friction head, the plastic metal is violently plastic deformed and extruded, thereby once molding; and the production efficiency of the fine crystal bar stock is increased; and (3) the structure is simple and practical, the fine crystal bar stock can be quickly produced and the structure has a reference significance in surface polishing and fine crystal treatment.
Description
Technical field
The present invention relates to the material engineering field, relate in particular to a kind of preparation facilities and method of thin crystal bar material.
Background technology
Metallic substance inside is made up of many crystal grain, and number of dies is many more in the unit volume, and crystal grain is thin more, and the close grain metal has higher intensity, hardness, plasticity and toughness than coarse grained metal, has a extensive future in fields such as electrotechnical, electronic, instrument, aerospace.
The current method for preparing grained material has: rotten processing, rapid solidification, vibration and stirring, large plastometric set technology; The first three technology is in melting or heat treatment process, to carry out thin brilliant the processing; And the large plastometric set technology is to make grain refining through shearing and viscous deformation, and this technology comprises high pressure torsion method, equal channel angular extrusion process, circulation extrusion process etc.; Adopt friction to press distortion property to go the horizontal transfer method like patent (CN1446935); Material surface is carried out thin brilliant the processing; Simultaneously adopt the mode of induction heating and torsional shear to come refinement bar-shaped metal materials crystal grain again; This invention can be carried out thin brilliant the processing to metallic surface and existing bar, but complex process; Patent (CN101294238) adopts equal channel angular pressing texturing grain refining method, can keep material shape and size before and after distortion constant, but still need multiple tracks upsetting squeeze distortion, and mould is had relatively high expectations; Patent (CN102051564A) proposes annealing+cold rolling method and prepares ultra-fine brilliant copper alloy plate, and but need repeatedly carry out repeatedly cold rolling, and equipment tonnage height.
With above-mentioned patent is each tool relative merits of method of representative: can to panel surface or or existing bar carry out thin brilliant the processing, but technology is comparatively complicated, often needs extruding repeatedly; Higher to equipment tonnage and volume requirement; And do not propose one-time formed thin crystal bar preparation method for material, be difficult to satisfy demand, although can be processed into by the bigger thin crystal bar material of diameter to the less thin crystal bar material of diameter; But the expense of obviously taking a lot of work material, cost is higher.
Summary of the invention
Goal of the invention: the objective of the invention is to deficiency to prior art; A kind of preparation facilities and method of thin crystal bar material are provided; It need not melting of metal and too much heat treatment step; Utilize the high temperature friction extruding to produce viscous deformation, realize the disposal molding of thin crystal bar material, thereby satisfy the demand of the thin crystal bar material of small dia.
Technical scheme: the preparation facilities of a kind of thin crystal bar material of the present invention; Comprise friction head and drive unit thereof; The friction head top has cylindrical cavity, and the bottom has tubaeform cavity, and said cylindrical cavity and tubaeform cavity connect each other; The bottom surface of friction head has thread groove, is used for plastic metal is involved in the axle center and it is gathered at tubaeform cavity.
Further improve technique scheme; Said drive unit comprises head, support, hollow spindle and main bush, and the top of said friction head is fixed on the bottom of hollow spindle; The PTO of said head drives the hollow spindle rotation through transmission rig; Said main bush is fixed on the hollow spindle, and said main bush on support, can rotate it through bearing fixing on support.
Further, be provided with the guide sleeves of the thin crystal bar material of auxiliary cooling in the said hollow spindle, its cross section is an annular, and set inside has quench liquid, is used for auxiliary cooling, avoids crystal grain at high temperature excessively to grow up.
Further, said PTO is provided with gear, and said hollow spindle is provided with follower gear, passes through the neutral gear transferring power between said gear and the follower gear.
The method that adopts said apparatus to prepare thin crystal bar material is: rotate with respect to plate through the drive device drives friction head, friction head applies axle pressure to plate simultaneously; Along with increasing of frictional heat; Near friction head and the plate contact surface metal is plastified, crystal grain is broken; Form plastic metal stream gradually; These plastic metals are involved in the axle center by the thread groove of friction head end, the tubaeform cavity accumulated in friction head, and be squeezed into gradually in the cylindrical cavity on friction head top; Under plastic metal in the tubaeform cavity of follow-up entering constantly pushed, the metal in original cylindrical cavity was extruded out, formed the cylindrical thin crystal bar material of certain-length.
Further, aforesaid method also comprises the cylindrical thin crystal bar material after the extrusion molding is carried out anneal under the annealing process condition, to obtain uniform and stable fine grained texture.
Further, said annealing process condition is: under 120-250 ℃ temperature condition, and anneal 0.5-1 hour.
Further, friction pressure not only influences frictional heat, also influences the process of plastic metal extrusion molding, and therefore in the preparation process, needing to keep friction pressure is the constant value, and the axle pressure that is applied between friction head and the flitch is about 14000N.
Speed of rotation is the same with friction pressure, also can influence the size of frictional heat, and the too fast heat production of speed of rotation is excessive; The plastic metal temperature is higher; The danger that makes the bar grain growth is arranged, and speed of rotation is too small, and the plastic metal amount is not enough; Extrusion molding is difficult to realize that therefore the speed of rotation of said friction head is 600-1000rpm.
At last, friction head needs relative plate to move horizontally in the preparation process, and translational speed and friction pressure and speed of rotation are complementary, and are directly proportional with the product of speed of rotation with friction pressure, and its scope is 200-300mm/min.
The present invention compared with prior art, its beneficial effect is: the present invention (1) prepares thin crystal bar material easily through high temperature friction between friction head and the plate and extruding viscous deformation; (2) friction head is simple for structure, simple to operate, behind the plastic metal engaging friction internal cavities, and through after intensive viscous deformation and the extruding, can once shaped, improved the production efficiency of thin crystal bar material; (3) simple and practical, not only can produce thin crystal bar material fast, panel surface grinding, thin brilliant the processing also all there are reference significance.
Description of drawings
Fig. 1 prepares the synoptic diagram of thin crystal bar material for adopting friction head.
Fig. 2 is a friction head end face spiral slot elevational schematic view.
Fig. 3 is the structural representation of the preparation facilities of thin crystal bar material among the embodiment.
Fig. 4 is the operational flowchart of the thin crystal bar material of preparation among the embodiment.
Embodiment
Be elaborated in the face of technical scheme of the present invention down, but protection scope of the present invention is not limited to said embodiment.
As shown in Figure 3; The preparation facilities of the thin crystal bar material of a kind of duraluminum comprises cylindrical friction head made from high-temperature alloy steel 1 and the drive unit that drives its rotation, and friction head 1 top has cylindrical cavity; The bottom has tubaeform cavity; Said cylindrical cavity and tubaeform cavity connect each other, and the bottom surface of friction head has thread groove, are used for plastic metal is involved in the axle center and it is gathered at tubaeform cavity.
As shown in Figure 2, Fig. 2 (a) is four strands of thread grooves, and Fig. 2 (b) is two strands of thread grooves, and Fig. 2 (c) is the sub-thread thread groove, and in three kinds of thread grooves any one can both satisfy requirement of the present invention.Sense of rotation is clockwise (looking up) among the present invention; When the spiral fluted rotation direction changes, also need change sense of rotation, otherwise, can cause that plastic metal along the thread groove surface of friction that flies out, can not gather in the axle center, thereby can not form thin crystal bar material.
Said drive unit; Comprise head 9, support 8, hollow spindle 4 and main bush 5; The top of said friction head 1 is through the bottom of screw retention at hollow spindle 4; PTO is provided with gear 10, and follower gear 3 closely cooperates through moving gear set screw nut 12 with hollow spindle 4, meshes through neutral gear 14 between said gear 10 and the follower gear 3; Hollow spindle 4 passes main bush 5 and through tubular shaft set screw nut 6 both is linked together, and prevents to relatively rotate through key and keyway simultaneously; 5 of main bushes are connected fixing with support 8 through pair of bearings 13, it can rotate on support 8; Support 8 is connected with head 9 through the dovetail chute, thereby friction head 1, follower gear 3, hollow spindle 4 all are installed on the head 9.
During device work, head output shaft and gear 10, follower gear 3, friction head 1, hollow spindle 4, main bush 5 equal high speed rotating, support 8 can move up and down through chute.
As shown in Figure 1, the preparation method of said apparatus is: between friction head 1 and plate 2, apply bigger axle pressure, and friction head 1 is pressed direction 11 high speed rotating with respect to plate 2; Along with increasing of frictional heat; Friction head 1 is plastified rapidly with near the metal of plate 2 contact surfaces, crystal grain is broken; Formation plastic metal stream; These plastic metals stream is involved in the surface of friction center by the spiral slot of friction head 1 end, gathers manyly more in the tubaeform cavity in friction head 1 more, and is squeezed into gradually in the small cylindrical cavity on friction head 1 top; After follow-up plastic metal constantly got in the tubaeform cavity, the metal in original small cylindrical cavity was extruded out, forms the cylindrical thin crystal bar material of certain-length.
When device work, after thin crystal bar material is extruded the cylindrical cavity on friction head 1 top, at high temperature excessively grow up for fear of crystal grain; Need cooling as early as possible; Therefore guide sleeves 7 is set in hollow spindle 4, its cross section is an annular, and set inside has quench liquid; Thin crystal bar material gets into guiding cover 7, is used for auxiliary cooling.
As shown in Figure 4, the flow process that adopts said apparatus to prepare the thin crystal bar material of duraluminum is:
(1) the start before, need carry out pre-treatment, the pre-treatment content comprises: fixedly alloy plate material 2, the installation friction head 1;
(2) friction head 1 begins to press down, and when contact plate 2, friction head 1 continues to press down, and begins rotation simultaneously, the direction (11) that sense of rotation is as shown in Figure 1;
(3) when friction head 1 after the original place rotational time surpasses setting-up time, whether inspection pressure reaches set(ting)value, presses down with pressure boost if not friction head, moves if friction head stops to press down and begins;
(4) whether the inspection bar has stretched out guiding cover 7, if not getting back to for the 3rd step, if then shut down, take out bar;
(5) behind the taking-up bar, the thermal treatment of annealing;
(6) the preparation process of end fine-grained aluminium alloy bar.
Wherein, parameter and annealing is: under 120-250 ℃ temperature condition, and anneal 0.5-1 hour.
As stated, although represented and explained the present invention that with reference to specific preferred embodiment it shall not be construed as the restriction to the present invention self.Under the spirit and scope of the present invention prerequisite that does not break away from the accompanying claims definition, can make various variations in form with on the details to it.
Claims (7)
1. the preparation facilities of a thin crystal bar material; It is characterized in that comprise friction head and drive unit thereof, the friction head top has cylindrical cavity; The bottom has tubaeform cavity; Said cylindrical cavity and tubaeform cavity connect each other, and the bottom surface of friction head has thread groove, are used for plastic metal is involved in the axle center and it is gathered at tubaeform cavity.
2. the preparation facilities of thin crystal bar material according to claim 1 is characterized in that, said drive unit; Comprise head, support, hollow spindle and main bush; The top of said friction head is fixed on the bottom of hollow spindle, and the PTO of said head drives the hollow spindle rotation through transmission rig, and said main bush is fixed on the hollow spindle; Said main bush on support, can rotate it through bearing fixing.
3. the preparation facilities of thin crystal bar material according to claim 2 is characterized in that, is provided with the guide sleeves of the thin crystal bar material of auxiliary cooling in the said hollow spindle, and its cross section is an annular, and set inside has quench liquid.
4. the preparation facilities of thin crystal bar material according to claim 2 is characterized in that, said PTO is provided with gear, and said hollow spindle is provided with follower gear, passes through the neutral gear transferring power between said gear and the follower gear.
5. a method that adopts the said device of claim 1 to prepare thin crystal bar material is characterized in that, rotates with respect to plate through the drive device drives friction head, and between applies axle pressure simultaneously; Along with increasing of frictional heat; Near friction head and the plate contact surface metal is plastified, crystal grain is broken; Form plastic metal stream gradually; These plastic metals are involved in the axle center by the thread groove of friction head end, the tubaeform cavity accumulated in friction head, and be squeezed into gradually in the cylindrical cavity on friction head top; Under plastic metal in the tubaeform cavity of follow-up entering constantly pushed, the metal in original cylindrical cavity was extruded out, formed the cylindrical thin crystal bar material of certain-length.
6. the method for the thin crystal bar material of preparation according to claim 5 is characterized in that, also comprises the cylindrical thin crystal bar material after the aforesaid method extrusion molding is carried out anneal under the annealing process condition.
7. the method for the thin crystal bar material of preparation according to claim 5 is characterized in that the speed of rotation of said friction head is 600-1000rpm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103603463A CN102839265A (en) | 2012-09-25 | 2012-09-25 | Preparation device for fine crystal bar stock and method |
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| CN2012103603463A CN102839265A (en) | 2012-09-25 | 2012-09-25 | Preparation device for fine crystal bar stock and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256453A (en) * | 2001-03-05 | 2002-09-11 | Akira Nishihara | Friction stir forming method |
| CN1637161A (en) * | 2003-01-10 | 2005-07-13 | 西北工业大学 | Prepn of columnar superfine crystal material |
| CN101613810A (en) * | 2009-07-21 | 2009-12-30 | 南昌航空大学 | The method of fractioning and extruding composite material |
| CN101629290A (en) * | 2008-07-15 | 2010-01-20 | 山野井精机株式会社 | A method of and a device for forming a projection on a metal member and a metal part produced by the method of forming a projection |
| CN101875154A (en) * | 2009-11-23 | 2010-11-03 | 北京赛福斯特技术有限公司 | Flowing friction welding method and tool thereof |
| CN102601517A (en) * | 2012-04-06 | 2012-07-25 | 江苏科技大学 | Same-direction different-speed double-shoulder stir friction welding device and application method |
-
2012
- 2012-09-25 CN CN2012103603463A patent/CN102839265A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256453A (en) * | 2001-03-05 | 2002-09-11 | Akira Nishihara | Friction stir forming method |
| CN1637161A (en) * | 2003-01-10 | 2005-07-13 | 西北工业大学 | Prepn of columnar superfine crystal material |
| CN101629290A (en) * | 2008-07-15 | 2010-01-20 | 山野井精机株式会社 | A method of and a device for forming a projection on a metal member and a metal part produced by the method of forming a projection |
| CN101613810A (en) * | 2009-07-21 | 2009-12-30 | 南昌航空大学 | The method of fractioning and extruding composite material |
| CN101875154A (en) * | 2009-11-23 | 2010-11-03 | 北京赛福斯特技术有限公司 | Flowing friction welding method and tool thereof |
| CN102601517A (en) * | 2012-04-06 | 2012-07-25 | 江苏科技大学 | Same-direction different-speed double-shoulder stir friction welding device and application method |
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Application publication date: 20121226 |