CN103341513A - Extrusion forming method for magnesium alloy housing type component ring ribs - Google Patents

Extrusion forming method for magnesium alloy housing type component ring ribs Download PDF

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Publication number
CN103341513A
CN103341513A CN2013102701251A CN201310270125A CN103341513A CN 103341513 A CN103341513 A CN 103341513A CN 2013102701251 A CN2013102701251 A CN 2013102701251A CN 201310270125 A CN201310270125 A CN 201310270125A CN 103341513 A CN103341513 A CN 103341513A
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China
Prior art keywords
distinguish punch
punch
distinguish
extrusion
split
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CN2013102701251A
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CN103341513B (en
Inventor
张治民
于建民
李旭斌
孟模
王强
张福祥
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North University of China
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North University of China
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Abstract

The invention discloses an extrusion forming method for magnesium alloy housing type component ring ribs. The extrusion forming method comprises the following steps of: (1), placing a processed hollow blank in a barrel-shaped hollowing block; (2), symmetrically arranging at least two split terrace dies in an inner tube of the hollow blank, moving the split terrace dies in the radial direction, respectively extruding the inner tube wall surface of the hollow blank by extrusion bulges of the split terrace dies, forming a certain vacancy between the extrusion bulges of the two split terrace dies, enabling un-extruded part of the inner wall of the hollow blank to plastically flow towards the vacancy between the extrusion bugles to form radial bulges, and automatically returning the split terrace dies; and (3), rotating the split terrace dies by a certain angle to reach positions at which the extrusion bulges of the split terrace dies correspond to the radial bulges, circulating the extrusion operation in the step (2), retracting the extruded split terrace dies, extruding the ring ribs at the periphery, repeating the operations when the split terrace dies reach the position of the next ring rib, and finally forming the qualified housing component with the ring ribs.

Description

A kind of extrusion forming method of magnesium alloy shell class part ring muscle
Technical field
The present invention relates to metal material plastic working technique and forming technique field, particularly a kind of extrusion forming method of magnesium alloy shell class part ring muscle.
Background technology
The density of magnesium alloy has only 1.7g/cm 3(proportion be about steel 1/4th), it is the lightest present a kind of structural metallic materials, in addition, from the engineering application point of view, because magnesium alloy has very high specific strength and specific stiffness, good damping shock absorption performance and capability of electromagnetic shielding, it is become face the future, eco-friendly utility structure material.
But the crystal structure of magnesium alloy is close-packed hexagonal structure, and slide surface is few, and plastic deformation difficulty under the room temperature condition becomes the main cause that hinders the wrought magnesium alloy Application and Development.At present, the plastic deformation of magnesium alloy all needs to be heated to more than the recrystallization temperature.
Rotary pressure technology is as a kind of advanced person's plastic forming process, because it has characteristics such as the lightweight of easy realization product, flexibility, efficient, precision form manufacturing, has been widely used in metal precision processing technology fields such as automobile, Aeronautics and Astronautics, military project.At present, spinning process is widely used for the part of muscle in the forming belt.But the quality of the ring muscle that is shaped often can not reach requirement, and muscle often filling is discontented.Particularly for the low magnesium alloy materials of Plastic Forming performance, be easy to occur the defective of crackle, ripple, accumulation, fracture etc.The spinning process that exists is for magnesium alloy at present, and adaptability is also bad.
Summary of the invention
Main purpose of the present invention is the magnesium alloy shell part forming at large-scale band muscle class, propose a kind of extrusion forming method of magnesium alloy shell class part ring muscle, purpose is that the ring muscle that effectively overcomes large-scale magnesium alloy shell part adopts the big shortcoming of conventional extruded forming technology plastic force and easily produces various defectives.
The extrusion forming method of a kind of magnesium alloy shell class part ring muscle of the present invention, step is:
(1), when working, shows the hollow blank of handling well and put into the tubular die;
(2), at least two distinguish punch are symmetrically placed in the interior pipe of hollow blank, drive the radial motion of distinguish punch, the expression lobes of distinguish punch is the inner tubal wall face of extruded hollow blank respectively, there is certain room between the expression lobes of two distinguish punch, the part that is not extruded at the inwall of extrusion process hollow core blank can be done plasticity to the room of depositing between the expression lobes and flow and form radially protuberance, distinguish punch automatic homing then;
(3), the distinguish punch rotates to an angle, arrive the expression lobes of distinguish punch and radially swell corresponding position, and then the extruding in the 2nd step is moved above the circulation, distinguish punch withdrawal after extruding finishes, squeezed the annular muscle in a week, reach the requirement of processing after, the distinguish punch arrives the position of next annular muscle, repeat top action again, form the shell part of qualified band muscle at last.
This forming terrace die adopts the mode of distinguish, makes each segmental mandrel produce radial motion, and then makes the metal generation that contacts radially reach axial flow, produces the muscle of hoop.When the distinguish punch is loaded into certain depth, shrink certain degree of depth vertically, the distinguish punch rotates a certain angle then, rotates to the position that was not expressed to just now.After adopting such scheme, the present invention has following technique effect: in the technology, adopt distinguish punch radial compression to finish the shaping of ring muscle, the extruding force in the time of can reducing to be shaped significantly reduces energy consumption.In the extrusion process used for forming, the strain facies of the muscle of housing formed thereby and wall portion is to evenly.Simultaneously, the ring muscle height of formed thereby of the present invention can reach 50mm-100mm, the steady quality of formed thereby muscle, reliable.After the product shaping, distinguish punch radial contraction, workpiece can successfully be deviate from, and is easy to operate simple, the production efficiency height.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the general assembly drawing of extrusion die of the present invention;
Fig. 2 is the general assembly drawing A-A place cutaway view of extrusion die of the present invention;
Fig. 3 is the ring muscle housing part figure behind the extrusion molding of the present invention;
Fig. 4 is the cutaway view of the distinguish punch of extrusion die of the present invention;
Fig. 5 is the vertical view of the distinguish punch of extrusion die of the present invention;
Fig. 6 is the upward view of the distinguish punch of extrusion die of the present invention;
Fig. 7 is the cutaway view of the rail plate of extrusion die of the present invention;
Fig. 8 is the left view of the rail plate of extrusion die of the present invention;
Fig. 9 is the upward view of the rail plate of extrusion die of the present invention;
Figure 10 is hoop muscle forming process schematic flow sheet one of the present invention;
Figure 11 is design sketch after the hoop muscle of Figure 10 is shaped;
Figure 12 is hoop muscle forming process schematic flow sheet two of the present invention;
Figure 13 is hoop muscle forming process schematic flow sheet three of the present invention;
Figure 14 is hoop muscle forming process schematic flow sheet four of the present invention;
Figure 15 is hoop muscle forming process schematic flow sheet five of the present invention.
The specific embodiment
The present invention specifies by specific embodiment.
As Fig. 1; shown in Figure 2; a kind of mold for extruding and forming of magnesium alloy shell class part ring muscle; mainly comprise cope match-plate pattern 2; mandrel 4; distinguish punch pull bar 6; pull bar fixed head 1; extension spring 9; distinguish punch 7; punch rail plate 10; distinguish punch sliding floor 11; supporting plate 12; tubular die 13; described mandrel 4 heads are tapered; afterbody is fixed on the cope match-plate pattern 2 by punch retainer 5; mandrel 4 axially has centre bore 41; described distinguish punch pull bar 6 one ends are plugged in the centre bore 41; the centre bore 41 of described mandrel 4 is the little shoulder hole of the big hypomere diameter of epimere diameter; it is fixing that the pull bar fixed head 1 of centre bore 41 hypomeres and centering hole 41 epimeres is passed in distinguish punch pull bar 6 upper ends; the lower end of distinguish punch pull bar 6 is fixed on the distinguish punch sliding floor 11; distinguish punch 7 more than at least two is arranged symmetrically in distinguish punch sliding floor 11 tops centered by distinguish punch pull bar 6; described mandrel 4; distinguish punch pull bar 6; distinguish punch 7; pull bar fixed head 1; supporting plate 12 integral body place in the die cavity of tubular die 13; supporting plate 12 withstands the bottom of distinguish punch sliding floor 11 from the below; described distinguish punch 7 is provided with a blind hole 79; extension spring 9 places blind hole 79; one end is fixed on blind hole 79 bottoms; the other end is fixed on the distinguish punch pull bar 6 by 9 extension spring fixed heads 8; fixedly there is punch rail plate 10 bottom of distinguish punch 7 by bolt and pin; on the distinguish punch sliding floor 11 centered by distinguish punch pull bar 6 correspondence be provided with radial groove (figure do not look out), described punch rail plate 10 places the radial groove of distinguish punch sliding floor 11.
As Fig. 1, Fig. 2, Fig. 4, Fig. 5, shown in Figure 6, described distinguish punch 7 is fan-shaped cylinder, distinguish punch 7 inboards are provided with wedge inclined-plane 72 that the conical nose with mandrel 4 adapts and are provided with blind hole 79 with distinguish punch pull bar 6 corresponding positions, the outer arcuate wall of distinguish punch is provided with arc expression lobes 71, as shown in figure 12, the arc length of the arc expression lobes 71 of distinguish punch 7 is greater than the distance in room 78 between the arc expression lobes of adjacent in twos distinguish punch 7.
As Fig. 1, shown in Figure 2, tubular adjustable ring 16 is housed in the die cavity of tubular die 13, preprocessing hollow blank 14 places in the adjustable ring 16, described mandrel 4, distinguish punch pull bar 6, distinguish punch 7, supporting plate 12 integral body place the interior pipe of preprocessing hollow blank 14, go up around the cavity lateral of tubular die 13 at least two screws (scheming not shown) are set, adjusting screw(rod) 15 is screwed onto in the screw against tubular adjustable ring 16, the center that is used for the adjustable ring 16 of adjustment, thereby the center of the interior pipe of assurance preprocessing hollow blank 14 is consistent with distinguish punch pull bar 6 centers, the expression lobes 71 of each distinguish punch 7 equates with the distance of the inner tubal wall of hollow blank 14 like this, and the ring muscle of extrusion molding is evenly whole.
As Fig. 1, Fig. 7, Fig. 8, shown in Figure 9; the bottom of punch rail plate 10 is provided with T type guide rail 101; distinguish punch sliding floor 11 correspondences are provided with T type chute (figure does not look out) radially, and the T type guide rail 101 of described punch rail plate 10 places the T type chute of distinguish punch sliding floor 11.
The extrusion molding manufacturing process of a kind of magnesium alloy shell class part ring muscle of the present invention is:
(1), as shown in Figure 1 and Figure 2, during work, the existing hollow blank of handling well 14 is put into tubular die 13, regulates adjusting screw(rod) 15 then, makes adjustable ring 16 compress hollow blank 14;
(2), as Fig. 1, shown in Figure 2, mandrel 4 is being with distinguish punch 7 to drop to certain height, distinguish punch 7 places the interior pipe of hollow blank 14, supporting plate 12 ejects rising by liftout tank then, hold distinguish punch sliding floor 11, mandrel 4 moves downward then, utilize the conical surface to drive radial motion in the chute of distinguish punch 7 on distinguish punch sliding floor 11, (be signal with two distinguish punch 7) as shown in figure 10, the expression lobes 71 of two distinguish punch 7 is the inner tubal wall face of extruded hollow blank 14 respectively, after having pushed a passage, as shown in figure 11, the pit 141 that two of the formation of the internal face of hollow blank 14 and expression lobes 71 are corresponding, owing to have certain room 78 between the expression lobes 71 of two distinguish punch 7, and there is the gap between two distinguish punch 7, so can doing the plasticity formation of flowing to the room 78 of depositing between the expression lobes 71, the part that is not extruded at the inwall of extrusion process hollow core blank 14 radially swells 142 (the anti-a part of metals that flow that squeeze), this inwall plastic deformation that guarantees hollow blank 14 to a certain extent is more even, reduce the active force of mandrel 4 pushing distinguish punch 7 simultaneously, mandrel 4 backhauls, then distinguish punch 7 under the effect of extension spring 9 in the chute of distinguish punch sliding floor 11 automatic homing;
(3); after mandrel 4 pushes identical height to above-mentioned the 2nd step down again; supporting plate 12 drives distinguish punch sliding floor 11; distinguish punch 7 and distinguish punch pull bar 6 rotate to an angle in the centre bore 41 of mandrel 4; the expression lobes 71 that arrives distinguish punch 7 with radially swell 142 corresponding positions; and then the extruding in the 2nd step is moved above the circulation; as Figure 13; shown in Figure 12; hollow blank 14 radially swell 142 under the extruding of distinguish punch 7; radially swell 142 be driven plain consistent with the bottom surface of pit 141; distinguish punch 7 continues extruding; radially swelling originally 142 has been forced out the pit 1421 (as shown in figure 14) darker than pit 141; 7 withdrawals of distinguish punch were withdrawed from from pit 1421 after extruding finished; supporting plate 12 rotates a certain angle again; again pit 141 is pushed (as shown in figure 15); squeezed the annular muscle in a week; after reaching the requirement of processing; mandrel 4 is with distinguish punch pull bar 6; distinguish punch 7; pull bar fixed head 1 drops to the position of next annular muscle together; repeat top action again, form the shell part 3 (as shown in Figure 3) of qualified band muscle at last.
This manufacturing process adopts the mode of distinguish punch 7, utilizes the axially-movable of mandrel 4, according to the principle that wedge loads, makes each distinguish punch 7 produce radial motion, and then makes hollow blank 14 generations that contact radially reach axial flow, produces the muscle of hoop.When distinguish punch 7 is loaded into certain depth, shrink certain degree of depth vertically, distinguish punch 7 rotates a certain angle then, rotate to the position that was not expressed to just now, push the degree of depth identical with last time then, because the size in room 78 has corresponding relation between the expression lobes 71 of the distinguish punch 7 that radial compression projection 71 and two is adjacent when distinguish punch 7 design, thus the material that applies of radial compression in the arc length scope, can cover fully and not have the metal that is out of shape in the hoop scope.After this time having loaded, all finished the extruding of certain depth at the whole hoop of barrel.
In addition, the degree of depth of radially advancing with distinguish punch 7 increases, it is big that the size in the room 78 that produces also becomes gradually, the present invention can decide the quantity of distinguish according to the diameter of shaping shell part, as shown in Figure 2,8 distinguish punch 7 distinguish punch 7 place the interior pipe of hollow blank 14, when each radial compression, each distinguish punch 7 only accounts for 1/8 of whole hoop at the circumferential area that radially applies, therefore required radial load just can reduce greatly, and distinguish punch 7 structures can effectively prevent when follow-up extruding the metal flow unstability or produce folding.
As shown in figure 11, it is to be to simplify drawing that this figure only draws the interior pipe that 2 distinguish punch 7 place hollow blank 14, be beneficial to better illustrate manufacturing process principle of the present invention, as shown in figure 12, distinguish punch 7 is behind the interval radial compression certain depth in A district, return, be rotated counterclockwise to the interval range in B district the radial compression certain depth then.By that analogy, distinguish punch 7 is rotated counterclockwise by the C district.

Claims (1)

1. the extrusion forming method of a magnesium alloy shell class part ring muscle, it is characterized in that: step is:
(1), when working, shows the hollow blank of handling well and put into the tubular die;
(2), at least two distinguish punch are symmetrically placed in the interior pipe of hollow blank, drive the radial motion of distinguish punch, the expression lobes of distinguish punch is the inner tubal wall face of extruded hollow blank respectively, there is certain room between the expression lobes of two distinguish punch, the part that is not extruded at the inwall of extrusion process hollow core blank can be done plasticity to the room of depositing between the expression lobes and flow and form radially protuberance, distinguish punch automatic homing then;
(3), the distinguish punch rotates to an angle, arrive the expression lobes of distinguish punch and radially swell corresponding position, and then the extruding in the 2nd step is moved above the circulation, distinguish punch withdrawal after extruding finishes, squeezed the annular muscle in a week, reach the requirement of processing after, the distinguish punch arrives the position of next annular muscle, repeat top action again, form the shell part of qualified band muscle at last.
CN201310270125.1A 2013-06-17 2013-06-17 A kind of extrusion forming method of magnesium alloy shell class part ring muscle Active CN103341513B (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567248A (en) * 2013-10-21 2014-02-12 中北大学 Extrusion forming mold for cylinder with rib-equipped inner and outer special-shaped surfaces
CN106180507A (en) * 2016-07-28 2016-12-07 江苏太平洋精锻科技股份有限公司 Thin wall cylinder inwall second radially inner ring forming technology
CN106216472A (en) * 2016-06-30 2016-12-14 中北大学 A kind of umbellate form housing member warm-extrusion forming method
CN106363031A (en) * 2016-09-01 2017-02-01 中北大学 Rotating extrusion forming method for large height-width ratio inner ring rib formed by hollow blank
CN106424188A (en) * 2016-09-01 2017-02-22 中北大学 Rotary extrusion forming mold for forming large depth-width ratio inner ring rib through hollow blank
CN108480411A (en) * 2018-04-03 2018-09-04 北京科技大学 A kind of strong flow extrusion molding apparatus of Magnesium alloy strip muscle cylindrical member and method
CN108687152A (en) * 2018-05-03 2018-10-23 燕山大学 A kind of two-way point of mould rotary extradition forming die of inner ring muscle and die sinking method
CN108723106A (en) * 2018-05-03 2018-11-02 燕山大学 A kind of multidirectional load rotary extradition forming die and die sinking method of parallel point of mould
CN109692907A (en) * 2019-01-08 2019-04-30 中北大学 A kind of more inner ring muscle rotary extrusion forming methods of cylindrical member
CN113084053A (en) * 2021-03-25 2021-07-09 武汉理工大学 Rolling extrusion composite near-net forming method for large inner contour abrupt cross-section ring piece

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CN1051893A (en) * 1989-11-21 1991-06-05 株式会社前田制作所 Have the bucket of continous reinforced muscle and the shaped device of continous reinforced muscle
CN1163582A (en) * 1995-06-07 1997-10-29 美国国家制罐公司 Reshaped container and method and apparatus for reshaping container
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CN102489616A (en) * 2011-11-24 2012-06-13 贵州安大航空锻造有限责任公司 Thermal bulging process for rectangular stainless steel rolled ring workpieces

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103567248A (en) * 2013-10-21 2014-02-12 中北大学 Extrusion forming mold for cylinder with rib-equipped inner and outer special-shaped surfaces
CN106216472A (en) * 2016-06-30 2016-12-14 中北大学 A kind of umbellate form housing member warm-extrusion forming method
CN106180507A (en) * 2016-07-28 2016-12-07 江苏太平洋精锻科技股份有限公司 Thin wall cylinder inwall second radially inner ring forming technology
CN106363031A (en) * 2016-09-01 2017-02-01 中北大学 Rotating extrusion forming method for large height-width ratio inner ring rib formed by hollow blank
CN106424188A (en) * 2016-09-01 2017-02-22 中北大学 Rotary extrusion forming mold for forming large depth-width ratio inner ring rib through hollow blank
US10265746B2 (en) 2016-09-01 2019-04-23 North University Of China Rotary extrusion producing method for producing inner ring rib with large aspect ratio formed of hollow billet
US10265747B2 (en) 2016-09-01 2019-04-23 North University Of China Rotary extrusion producing mold for producing inner ring rib with large aspect ratio formed of hollow billet
CN108480411A (en) * 2018-04-03 2018-09-04 北京科技大学 A kind of strong flow extrusion molding apparatus of Magnesium alloy strip muscle cylindrical member and method
CN108687152A (en) * 2018-05-03 2018-10-23 燕山大学 A kind of two-way point of mould rotary extradition forming die of inner ring muscle and die sinking method
CN108723106A (en) * 2018-05-03 2018-11-02 燕山大学 A kind of multidirectional load rotary extradition forming die and die sinking method of parallel point of mould
CN108687152B (en) * 2018-05-03 2019-11-01 燕山大学 A kind of two-way point of mould rotary extradition forming die of inner ring muscle and die sinking method
CN109692907A (en) * 2019-01-08 2019-04-30 中北大学 A kind of more inner ring muscle rotary extrusion forming methods of cylindrical member
CN113084053A (en) * 2021-03-25 2021-07-09 武汉理工大学 Rolling extrusion composite near-net forming method for large inner contour abrupt cross-section ring piece

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