CN1325205C - Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof - Google Patents
Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof Download PDFInfo
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- CN1325205C CN1325205C CNB2005100102241A CN200510010224A CN1325205C CN 1325205 C CN1325205 C CN 1325205C CN B2005100102241 A CNB2005100102241 A CN B2005100102241A CN 200510010224 A CN200510010224 A CN 200510010224A CN 1325205 C CN1325205 C CN 1325205C
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Abstract
The present invention relates to an equal radial-channel angular extruding machining apparatus of casting magnesium alloy and a machining method thereof, particularly to a machining apparatus which can improve the mechanical properties of casting magnesium alloy and a machining method thereof. The present invention solves the problem that casting magnesium alloy can not be applied to components with high requirements of mechanical properties. A concave die 5 of the equal radial-channel angular extruding machining apparatus is matched with a die case 3 in a clearance fit, a first straight channel 5-2 in the concave die 5 is communicated with a second straight channel 5-3 through a curved channel 5-4, a 90 DEG of angle is formed between the first straight channel 5-2 and the second straight channel 5-3, and the side surface of the die case 3 is provided with a through hole 3-1 communicated with the second straight channel 5-3. The equal radial-channel angular extruding machining method comprises: 1, machining blanks; 2, machining dies. After low-cost casting magnesium alloy is extruded for more than eight times by the equal radial-channel angular extruding machining apparatus, the diameters of refined grains are smaller than 20 micrometers, the tensile strength is enhanced to more than 350Mpa, and the extension rate is increased to more than 10%. The present invention can be directly applied to components with high requirements of mechanical properties.
Description
Technical field:
The present invention relates to a kind of processing unit (plant) and processing method thereof that can improve mechanical property of cast magnesium alloys.
Background technology:
The cast magnesium alloy low cost of manufacture, usually manufacturing cost has only about 1/10 of wrought magnesium alloy, good price advantage is arranged, but the crystallite dimension of cast magnesium alloy is thick, mechanical property is low, general crystallite dimension is that tensile strength is below 150MPa in the mechanical property about 200 μ m, and percentage elongation is less than 2%, therefore, cast magnesium alloy can only be used as the lower occasion of some mechanical property requirements usually.Want to make cast magnesium alloy can be applied on the high parts of mechanical property requirements, just must improve the mechanical property of cast magnesium alloy.
Summary of the invention:
The objective of the invention is to be applied to problem on the high parts of mechanical property requirements, thereby a kind of isometrical channel angular extruding machining apparatus and processing method thereof of cast magnesium alloy are provided in order to solve cast magnesium alloy.Isometrical channel angular extruding machining apparatus of the present invention, it comprises cope match-plate pattern 1, lower bolster 4 and backing plate 9, backing plate 9 is fixed on the lower surface of cope match-plate pattern 1, it also comprises cope match-plate pattern fixed cover 2, punch 8, pressing plate 7, die case 3 and die 5, the upper end of punch 8 is embedded in the cope match-plate pattern fixed cover 2, punch 8 is fixedlyed connected with the lower surface of backing plate 9 with the upper surface of cope match-plate pattern fixed cover 2, the central authorities of pressing plate 7 have a hole 7-1, pressing plate 7 is fixed on the upper surface of die case 3, the lower surface of die case 3 is fixedlyed connected with the upper surface of lower bolster 4, die 5 and die case 3 matched in clearance, have the first straight way 5-2 in the die 5, the second straight way 5-3 and bend 5-4, the first straight way 5-2 is connected with the second straight way 5-3 by bend 5-4 in the die 5, and be an angle of 90 degrees between the first straight way 5-2 and the second straight way 5-3, the side of die case 3 has a through hole 3-1, and the side through hole 3-1 of die case 3 is connected with the second straight way 5-3 in the die 5.Its die 5 is made of two and half die 5-1, the axial section of each half module 5-1 of die 5 has the isodiametric first semi-cylindrical straight way 5-1-1, the second semi-cylindrical straight way 5-1-2 and semi-cylindrical bend 5-1-3, the first semi-cylindrical straight way 5-1-1 is connected with the second semi-cylindrical straight way 5-1-2 by semi-cylindrical bend 5-1-3 in the half die 5-1, and be an angle of 90 degrees between the first semi-cylindrical straight way 5-1-1 and the second semi-cylindrical straight way 5-1-2, the axial section butt joint of two half module 5-1, and the first semi-cylindrical straight way 5-1-1 of two half module 5-1 and the central axis of the second semi-cylindrical straight way 5-1-2 overlap separately, the first semi-cylindrical straight way 5-1-1 butt joint of two half module 5-1 constitutes the first straight way 5-2 of die 5, the second semi-cylindrical straight way 5-1-2 butt joint of two half module 5-1 constitutes the second straight way 5-3 of die 5, the semi-cylindrical bend 5-1-3 butt joint of two half module 5-1 constitutes the bend 5-4 of die 5, and the outer surface of the die 5 that the axial section butt joint of two half module 5-1 constitutes and the inner surface of die case 3 are rounding conical surfaces.The step of angle, isometrical road of the present invention extruding method is: one, blank processing: with the simple and mechanical processing of cast magnesium alloy strand process, thereby form polylith cylinder blank 6; Two, Mould Machining: the above-mentioned every block of cylinder blank 6 that machines put in the isometrical channel angular extruding machining apparatus one by one push, every block of cylinder blank 6 carries out at least eight passage extrusion processes, described every block of cylinder blank 6 is before descending a time extrusion process, every block of cylinder blank 6 all is after rotating shaft is rotated an angle of 90 degrees clockwise or counterclockwise with the central shaft, put into again in the isometrical channel angular extruding machining apparatus and push, and described every block of cylinder blank 6 is all the time by same direction rotation.The step of a time extrusion process that every block of cylinder blank 6 carries out in its step 2 is: (I), described cylinder blank 6 that 8 pairs of the punch of isometrical channel angular extruding machining apparatus are in the first straight way 5-2 of die 5 pushes; (II), when the distance h at the angle of cut place of the upper surface of the cylinder blank 6 in the first straight way 5-2 of die 5 and the first straight way 5-2 and the second straight way 5-3 is 9～11mm, from the cylinder blank that blank machines, select another piece cylinder blank 6 again and put in the isometrical channel angular extruding machining apparatus and push; (III), repeat above-mentioned steps (II), till the described cylinder blank 6 in the step (I) is ejected die 5.
Angle, isometrical road of the present invention extruding method be a kind of do not change the blank cross sectional shape, through repeatedly the extruding can obtain the crystal grain thinning of deflection and the method that raising is extruded material mechanical performance, can carry out grain refinement and improve its mechanical property cast magnesium alloy cheaply with it, and have the advantage that does not change magnesium alloy blank cross sectional shape.Cast magnesium alloy pushes the above back grain refinement of eight passages below 20 μ m through isometrical channel angular extruding machining apparatus of the present invention cheaply, tensile strength is brought up to more than the 350MPa in the mechanical property, percentage elongation is brought up to more than 10% in the mechanical property, can directly apply on the high parts of mechanical property requirements.Isometrical channel angular extruding machining apparatus equipment needed thereby tonnage of the present invention is low, simple in structure, easy to operate.The manufacturing cost of the cast magnesium alloy after process the present invention handles only rises to 2-3 times of original manufacturing cost, the manufacturing cost that is to say the cast magnesium alloy after the processing only accounts for 1/5～3/10 of wrought magnesium alloy manufacturing cost, as seen, the present invention further uses in automobile, Aeronautics and Astronautics, electronics and weaponry field for low-cost magnesium alloy and has established technical foundation.
Description of drawings:
Fig. 1 is an overall structure schematic diagram of the present invention, and Fig. 2 is the structural representation of device in the specific embodiment one, Fig. 3 be the A-A of Fig. 2 to cut-away view, Fig. 4 is that the B of half die 5-1 among Fig. 3 is to view.
The specific embodiment:
The specific embodiment one: in conjunction with Fig. 2, Fig. 3 and Fig. 4 illustrate this specific embodiment, the processing unit (plant) of this specific embodiment is by cope match-plate pattern 1, lower bolster 4, backing plate 9, cope match-plate pattern fixed cover 2, punch 8, pressing plate 7, die case 3 and die 5 are formed, backing plate 9 is fixed on the lower surface of cope match-plate pattern 1, the upper end of punch 8 is embedded in the cope match-plate pattern fixed cover 2, punch 8 is fixedlyed connected with the lower surface of backing plate 9 with the upper surface of cope match-plate pattern fixed cover 2, the central authorities of pressing plate 7 have a hole 7-1, pressing plate 7 is fixed on the upper surface of die case 3, the lower surface of die case 3 is fixedlyed connected with the upper surface of lower bolster 4, die 5 and die case 3 matched in clearance, have the first straight way 5-2 in the die 5, the second straight way 5-3 and bend 5-4, the first straight way 5-2 is connected with the second straight way 5-3 by bend 5-4 in the die 5, and be an angle of 90 degrees between the first straight way 5-2 and the second straight way 5-3, the side of die case 3 has a through hole 3-1, and the side through hole 3-1 of die case 3 is connected with the second straight way 5-3 in the die 5.When adopting this specific embodiment, the lower end of punch 8 applies extruding force for cylinder blank 6, and the bend 5-4 of die 5 applies shearing force for cylinder blank 6.
The specific embodiment two: this specific embodiment is described in conjunction with Fig. 2, this specific embodiment with the difference of the specific embodiment one is: the diameter of its punch 8 lower ends is less than the diameter of the hole 7-1 of pressing plate 7 central authorities, and the diameter D1 of the second straight way 5-3 of die 5 is less than the diameter D2 of the side through hole 3-1 of die case 3.Other compositions are identical with the specific embodiment one with annexation.Enter into the first straight way 5-2 of die 5 when punch 8 is descending by the through hole 7-1 of pressing plate 7 central authorities; The diameter D2 of the side through hole 3-1 of die case 3 is convenient to cylinder blank 6 and is ejected from die 5 during greater than the diameter D1 of the second straight way 5-3.
The specific embodiment three: this specific embodiment is described in conjunction with Fig. 2, this specific embodiment with the difference of the specific embodiment one is: have the boss shoulder on the periphery of the upper surface of its punch 8, have a concave station shoulder on the inner headed face of cope match-plate pattern fixed cover 2, the periphery of the upper surface of punch 8 is fixedlyed connected by shoulder with the inner headed face of cope match-plate pattern fixed cover 2.Other compositions are identical with the specific embodiment one with annexation.When adopting this specific embodiment, be convenient to the installation and removal of the fixing and punch 8 of punch 8.
The specific embodiment four: in conjunction with Fig. 2, Fig. 3 and Fig. 4 illustrate this specific embodiment, this specific embodiment with the difference of the specific embodiment one is: its die 5 is made of two and half die 5-1, the axial section of each half module 5-1 of die 5 has the isodiametric first semi-cylindrical straight way 5-1-1, the second semi-cylindrical straight way 5-1-2 and semi-cylindrical bend 5-1-3, the first semi-cylindrical straight way 5-1-1 is connected with the second semi-cylindrical straight way 5-1-2 by semi-cylindrical bend 5-1-3 in the half die 5-1, and be an angle of 90 degrees between the first semi-cylindrical straight way 5-1-1 and the second semi-cylindrical straight way 5-1-2, the axial section butt joint of two half module 5-1, and the first semi-cylindrical straight way 5-1-1 of two half module 5-1 and the central axis of the second semi-cylindrical straight way 5-1-2 overlap separately, the first semi-cylindrical straight way 5-1-1 butt joint of two half module 5-1 constitutes the first straight way 5-2 of die 5, the second semi-cylindrical straight way 5-1-2 butt joint of two half module 5-1 constitutes the second straight way 5-3 of die 5, the semi-cylindrical bend 5-1-3 butt joint of two half module 5-1 constitutes the bend 5-4 of die 5, and the outer surface of the die 5 that the axial section butt joint of two half module 5-1 constitutes and the inner surface of die case 3 are rounding conical surfaces.Other compositions are identical with the specific embodiment one with annexation.When adopting this specific embodiment, die 5 for convenience detach and installations.
The specific embodiment five: this specific embodiment is described in conjunction with Fig. 1, the step of angle, the isometrical road extruding method of this specific embodiment is: one, blank processing: with the simple and mechanical processing of cast magnesium alloy strand process, thereby form polylith cylinder blank 6; Two, Mould Machining: the above-mentioned every block of cylinder blank 6 that machines put in the isometrical channel angular extruding machining apparatus one by one push, every block of cylinder blank 6 carries out at least eight passage extrusion processes, described every block of cylinder blank 6 is before descending a time extrusion process, every block of cylinder blank 6 all is after rotating shaft is rotated an angle of 90 degrees clockwise or counterclockwise with the central shaft, put into again in the isometrical channel angular extruding machining apparatus and push, and described every block of cylinder blank 6 is all the time by same direction rotation.As shown in Figure 1, a cylinder blank 6 is in the process of being extruded, and the effect that promptly is squeezed in isometrical channel angular extruding machining apparatus of the present invention of this piece cylinder blank 6 also is subjected to shear action.Can be used as machining product, forging or extrusion modling product, preparation magnesium alloy semi-solid state blank through the magnesium alloy after the processing of angle, isometrical road of the present invention extruding method.
The specific embodiment six: this specific embodiment is described in conjunction with Fig. 1, this specific embodiment with the difference of the specific embodiment five is: the diameter of cylinder blank 6 described in its step 1 is 40～150mm, and the length of described cylinder blank 6 is 80～400mm.Other steps are identical with the specific embodiment five.
The specific embodiment seven: in conjunction with Fig. 1 and Fig. 2 this specific embodiment is described, the difference of this specific embodiment and the specific embodiment five is: the step of a time extrusion process that every block of cylinder blank 6 carries out in its step 2 is: (I), described cylinder blank 6 that 8 pairs of the punch of isometrical channel angular extruding machining apparatus are in the first straight way 5-2 of die 5 pushes; (II), when the distance h at the angle of cut place of the upper surface of the cylinder blank 6 in the first straight way 5-2 of die 5 and the first straight way 5-2 and the second straight way 5-3 is 9～11mm, from the cylinder blank that blank machines, select another piece cylinder blank 6 again and put in the isometrical channel angular extruding machining apparatus and push; (III), repeat above-mentioned steps (II), till the described cylinder blank 6 in the step (I) is ejected die 5.Other steps are identical with the specific embodiment five.When the distance h at the angle of cut place of the upper surface of the cylinder blank 6 in the first straight way 5-2 of die 5 and the first straight way 5-2 and the second straight way 5-3 was 9～11mm, punch 8 was up, avoids damaging the isometrical channel angular extruding machining apparatus of cast magnesium alloy of the present invention.
The specific embodiment eight: in conjunction with Fig. 1 and Fig. 2 this specific embodiment is described, the difference of this specific embodiment and the specific embodiment seven is that the distance h at the angle of cut place of the upper surface of the cylinder blank 6 in the first straight way 5-2 of die 5 in the step (II) of every block of cylinder blank 6 a time extrusion process of carrying out and the first straight way 5-2 and the second straight way 5-3 is 10mm.Other steps are identical with the specific embodiment seven.
Claims (6)
1, the isometrical channel angular extruding machining apparatus of cast magnesium alloy, it comprises cope match-plate pattern (1), lower bolster (4) and backing plate (9), backing plate (9) is fixed on the lower surface of cope match-plate pattern (1), it also comprises cope match-plate pattern fixed cover (2), punch (8), pressing plate (7), die case (3) and die (5), the upper end of punch (8) is embedded in the cope match-plate pattern fixed cover (2), punch (8) is fixedlyed connected with the lower surface of backing plate (9) with the upper surface of cope match-plate pattern fixed cover (2), the central authorities of pressing plate (7) have a hole (7-1), pressing plate (7) is fixed on the upper surface of die case (3), the lower surface of die case (3) is fixedlyed connected with the upper surface of lower bolster (4), die (5) and die case (3) matched in clearance, have first straight way (5-2) in the die (5), second straight way (5-3) and bend (5-4), first straight way (5-2) is connected with second straight way (5-3) by bend (5-4) in the die (5), and be an angle of 90 degrees between first straight way (5-2) and second straight way (5-3), the side of die case (3) has a through hole (3-1), and the side through hole (3-1) of die case (3) is connected with second straight way (5-3) in the die (5); The die (5) that it is characterized in that it is made of two and half dies (5-1), the axial section of each half module (5-1) of die (5) has the isodiametric first semi-cylindrical straight way (5-1-1), the second semi-cylindrical straight way (5-1-2) and semi-cylindrical bend (5-1-3), the first semi-cylindrical straight way (5-1-1) is connected with the second semi-cylindrical straight way (5-1-2) by semi-cylindrical bend (5-1-3) in half die (5-1), and be an angle of 90 degrees between the first semi-cylindrical straight way (5-1-1) and the second semi-cylindrical straight way (5-1-2), the axial section butt joint of two half modules (5-1), and the first semi-cylindrical straight way (5-1-1) of two half modules (5-1) and the central axis of the second semi-cylindrical straight way (5-1-2) overlap separately, the first semi-cylindrical straight way (5-1-1) butt joint of two half modules (5-1) constitutes first straight way (5-2) of die (5), the second semi-cylindrical straight way (5-1-2) butt joint of two half modules (5-1) constitutes second straight way (5-3) of die (5), semi-cylindrical bend (5-1-3) butt joint of two half modules (5-1) constitutes the bend (5-4) of die (5), and the outer surface of the die (5) that the axial section butt joint of two half modules (5-1) constitutes and the inner surface of die case (3) are the rounding conical surfaces.
2, the isometrical channel angular extruding machining apparatus of cast magnesium alloy according to claim 1, the diameter of punch (8) lower end that it is characterized in that it is less than the diameter in the hole (7-1) of pressing plate (7) central authorities, and the diameter (D1) of second straight way (5-3) of die (5) is less than the diameter (D2) of the side through hole (3-1) of die case (3).
3, the isometrical channel angular extruding machining apparatus of cast magnesium alloy according to claim 1, it is characterized in that having the boss shoulder on its periphery of upper surface of punch (8), have a concave station shoulder on the inner headed face of cope match-plate pattern fixed cover (2), the periphery of the upper surface of punch (8) is fixedlyed connected by shoulder with the inner headed face of cope match-plate pattern fixed cover (2).
4, angle, the isometrical road extruding method of cast magnesium alloy, its step is: one, blank processing: with the simple and mechanical processing of cast magnesium alloy strand process, thereby form polylith cylinder blank (6); Two, Mould Machining: the above-mentioned every block of cylinder blank (6) that machines put in the isometrical channel angular extruding machining apparatus one by one push, every block of cylinder blank (6) carries out at least eight passage extrusion processes, described every block of cylinder blank (6) is before descending a time extrusion process, every block of cylinder blank (6) all is after rotating shaft is rotated an angle of 90 degrees clockwise or counterclockwise with the central shaft, put into again in the isometrical channel angular extruding machining apparatus and push, and described every block of cylinder blank (6) is all the time by the rotation of same direction, it is characterized in that the step of a time extrusion process that every block of cylinder blank (6) carries out in its step 2 is: (I), the punch (8) of isometrical channel angular extruding machining apparatus is pushed the described cylinder blank (6) in first straight way (5-2) that is in die (5); (II), when the distance (h) at the angle of cut place of the upper surface of the cylinder blank (6) in first straight way (5-2) of die (5) and first straight way (5-2) and second straight way (5-3) is 9～11mm, from the cylinder blank that blank machines, select another piece cylinder blank (6) again and put in the isometrical channel angular extruding machining apparatus and push; (III), repeat above-mentioned steps (II), till the described cylinder blank (6) in the step (I) is ejected die (5).
5, angle, the isometrical road extruding method of cast magnesium alloy according to claim 4 is characterized in that the diameter of cylinder blank (6) described in its step 1 is 40～150mm, and the length of described cylinder blank (6) is 80～400mm.
6, angle, the isometrical road extruding method of cast magnesium alloy according to claim 4, the upper surface that it is characterized in that the cylinder blank (6) in first straight way (5-2) of die (5) in the step (II) of a time extrusion process that every block of cylinder blank (6) carries out is 10mm with the distance (h) at the angle of cut place of first straight way (5-2) and second straight way (5-3).
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| CNB2005100102241A CN1325205C (en) | 2005-07-27 | 2005-07-27 | Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof |
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| CNB2005100102241A CN1325205C (en) | 2005-07-27 | 2005-07-27 | Equal radial-channel angular extruding machining apparatus of magnesium alloy and machining method thereof |
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| CN1325205C true CN1325205C (en) | 2007-07-11 |
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Cited By (1)
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| CN101850376A (en) * | 2010-06-08 | 2010-10-06 | 常州工学院 | Method and die for forward extrusion and variable diameter bending extrusion of magnesium alloy semi-solid billets |
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| CN101797595B (en) * | 2010-03-30 | 2011-12-21 | 中国航空工业集团公司北京航空材料研究院 | Convex and concave die cavity matching structure of multipath equal-channel extrusion device |
| CN101890438B (en) * | 2010-07-16 | 2011-11-30 | 中国航空工业集团公司北京航空材料研究院 | Male die of equal channel angular pressing device |
| CN102284536B (en) * | 2011-05-30 | 2014-03-26 | 哈尔滨工业大学 | Preparation device and method of magnesium alloy or aluminium alloy semisolid blanks by equal-channel reciprocating extrusion and spheroidization |
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| CN1712155A (en) | 2005-12-28 |
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