CN103341513B - A kind of extrusion forming method of magnesium alloy shell class part ring muscle - Google Patents
A kind of extrusion forming method of magnesium alloy shell class part ring muscle Download PDFInfo
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- CN103341513B CN103341513B CN201310270125.1A CN201310270125A CN103341513B CN 103341513 B CN103341513 B CN 103341513B CN 201310270125 A CN201310270125 A CN 201310270125A CN 103341513 B CN103341513 B CN 103341513B
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Abstract
The present invention discloses the extrusion forming method of a kind of magnesium alloy shell class part ring muscle, and step is: (1), the hollow blank handled well is put into tubular die；(2), at least two pieces of points of lobe punch are symmetrically placed in the inner tube of hollow blank, divide lobe punch radial motion, divide the inner tube wall of the expression lobes extruded hollow blank respectively of lobe punch, there is certain room between the expression lobes of two pieces of points of lobe punch, the room that the part that the inwall of hollow blank is not extruded is deposited between expression lobes is done Plastic Flow and is formed radially protuberance, then divides lobe punch automatic homing；(3), lobe punch is divided to rotate to an angle, reach the expression lobes dividing lobe punch and radially swell corresponding position, then the extruding action of the 2nd step above is recycled, after extruding finishes, point lobe punch is retracted, squeeze the annular muscle of a week, divide lobe punch to reach the position of next annular muscle, repeat action above, eventually form the shell part of qualified band muscle.
Description
Technical field
The present invention relates to metal material plastic working technique and forming technique field, particularly to
A kind of extrusion forming method of magnesium alloy shell class part ring muscle.
Background technology
The density of magnesium alloy only has 1.7g/cm3(proportion is about 1/4th of steel), is at present
Light a kind of structural metallic materials, in addition, from the angle of engineer applied, due to magnesium alloy tool
Have very high specific strength and specific stiffness, excellent damping characteristics and capability of electromagnetic shielding,
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, room temperature bar
It is plastically deformed difficulty under part, become the main cause hindering wrought magnesium alloy exploitation application.Mesh
Before, being plastically deformed of magnesium alloy is required for being heated to more than recrystallization temperature.
Rotary pressure technology is as the plastic forming process of a kind of advanced person, owing to it has easily realization
The features such as product lightweight, flexibility, efficient, precision form manufacture, are widely used to
The precision metal processing technique field such as automobile, Aeronautics and Astronautics, military project.At present, spinning work
Skill is widely used for the part of muscle in forming belt.But the quality of the ring muscle shaping is often not
Can reach requirement, muscle often filling is discontented with.Close especially for the low magnesium of Plastic Forming performance
For gold copper-base alloy, it is easy to the defect of crackle, ripple, accumulation, fracture etc. occurs.At present
The spinning process existing is for magnesium alloy, and adaptability is simultaneously bad.
Content of the invention
The main object of the present invention is the one-tenth of the magnesium alloy shell part for large-scale band muscle class
Shape, proposes the extrusion forming method of a kind of magnesium alloy shell class part ring muscle, it is therefore intended that have
Effect overcomes the ring muscle of large-scale magnesium alloy shell part to use conventional extruded forming technology plastic force big
Shortcoming and be easily generated various defect.
The extrusion forming method of a kind of magnesium alloy shell class part ring muscle of the present invention,
Step is:
(1), when, working, the existing hollow blank handled well puts into tubular die；
(2), at least two pieces of points of lobe punch are symmetrically placed in the inner tube of hollow blank, drive and divide
Lobe punch radial motion, the inner tubal wall of the expression lobes of point lobe punch extruded hollow blank respectively
, there is certain room between the expression lobes of two pieces of points of lobe punch, in extrusion process in face
The room that the part that the inwall of hollow core blank is not extruded can be deposited between expression lobes
Do Plastic Flow and form radially protuberance, then divide lobe punch automatic homing；
(3), divide lobe punch to rotate to an angle, reach expression lobes and the footpath of point lobe punch
To the corresponding position of protuberance, then recycling the extruding action of the 2nd step above, extruding finishes
Rear point of lobe punch is retracted, and has squeezed the annular muscle of a week, and after reaching the requirement of processing, point lobe is convex
Mould reaches the position of next annular muscle, repeats action above, and it is qualified to eventually form
The shell part of band muscle.
This forming terrace die uses the mode of point lobe, makes each segmental mandrel produce radial motion, and then
Make contacted metal produce radially and axially flow, produce the muscle of hoop.When a point lobe punch
When being loaded into certain depth, axially contract certain degree of depth, then divide lobe punch to rotate one
Fixed angle, rotates to the position not just now being expressed to.After using such scheme, this
Bright have following technical effect that in technique, use a point lobe punch radial compression to complete ring muscle
Shape, can significantly reduce extruding force during shaping, reduce energy consumption.Extrusion process used for forming
In, housing muscle formed thereby is relatively uniform with the strain in wall portion.Meanwhile, the present invention is formed thereby
Ring muscle height can reach 50mm-100mm, the steady quality of muscle formed thereby, reliable.Produce
After product shape, dividing lobe punch radial contraction, workpiece can successfully be deviate from, easy to operate letter
Single, production efficiency is high.
Brief description
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 is the general assembly drawing of the extrusion die of the present invention；
Fig. 2 is sectional view at the general assembly drawing A-A of the extrusion die of the present invention；
Fig. 3 be the extrusion molding of the present invention after ring muscle housing part figure；
Fig. 4 is the sectional view of point lobe punch of the extrusion die of the present invention；
Fig. 5 is the top view of point lobe punch of the extrusion die of the present invention；
Fig. 6 is the upward view of point lobe punch of the extrusion die of the present invention；
Fig. 7 is the sectional view of the rail plate of the extrusion die of the present invention；
Fig. 8 is the left view of the rail plate of the extrusion die of the present invention；
Fig. 9 is the upward view of the rail plate of the extrusion die of the present invention；
Figure 10 is the hoop muscle forming process schematic flow sheet one of the present invention；
Figure 11 be Figure 10 hoop muscle shape after design sketch；
Figure 12 is the hoop muscle forming process schematic flow sheet two of the present invention；
Figure 13 is the hoop muscle forming process schematic flow sheet three of the present invention；
Figure 14 is the hoop muscle forming process schematic flow sheet four of the present invention；
Figure 15 is the hoop muscle forming process schematic flow sheet five of the present invention.
Detailed description of the invention
The present invention is illustrated by specific embodiment.
As shown in Figure 1 and Figure 2, the mold for extruding and forming of a kind of magnesium alloy shell class part ring muscle,
Mainly include that the 9th, the 4th, cope match-plate pattern the 2nd, mandrel divide the 6th, pull bar fixed plate the 1st, the extension spring of lobe punch pull bar
The 10th, point lobe punch the 7th, punch rail plate divides lobe punch sliding floor the 11st, supporting plate the 12nd, cylinder
Shape die 13, described mandrel 4 head is tapered, and afterbody is fixed by punch retainer 5
On cope match-plate pattern 2, mandrel 4 axially has centre bore 41, described point lobe punch pull bar 6
One end is plugged in centre bore 41, and the centre bore 41 of described mandrel 4 is big in epimere diameter
The little shoulder hole of hypomere diameter, point lobe punch pull bar 6 upper end passes through centre bore 41 hypomere and puts
Fixing in the pull bar fixed plate 1 of centre bore 41 epimere, the lower end of point lobe punch pull bar 6 is fixed
On point lobe punch sliding floor 11, point lobe punch 7 of more than at least two pieces is convex around point lobe
It is arranged symmetrically in point lobe punch sliding floor 11 top, described mandrel centered on die drawing bar 6
4th, lobe punch pull bar is divided the 6th, to divide lobe punch the 7th, pull bar fixed plate the 1st, supporting plate 12 to be integrally placed at
In the die cavity of tubular die 13, supporting plate 12 withstands point lobe punch sliding floor 11 from below
Bottom, a described point lobe punch 7 is provided with a blind hole 79, and extension spring 9 is placed in blind hole 79, one end
Being fixed on bottom blind hole 79, the other end is fixed on a point lobe punch pull bar by extension spring fixed plate 8
On 6, the bottom of point lobe punch 7 is fixed with punch rail plate 10 by bolt and pin,
Divide and centered on point lobe punch pull bar 6, be correspondingly provided with radial groove on lobe punch sliding floor 11
(figure is not depending on going out), described punch rail plate 10 is placed in point lobe punch sliding floor 11
In radial groove.
As shown in Figure 1, Figure 2, shown in Fig. 4, Fig. 5, Fig. 6, described point lobe punch 7 is in fan
Shape cylinder, is provided with oblique with the wedge that the conical nose of mandrel 4 adapts inside point lobe punch 7
Face 72 and point lobe punch pull bar 6 corresponding position is provided with blind hole 79, the lateral arcs of point lobe punch
Shape wall is provided with arc expression lobes 71, as shown in figure 12, the arc extruding of point lobe punch 7
The arc length of protruding 71 is more than room between the arc expression lobes of point lobe punch 7 adjacent two-by-two
The distance of 78.
As shown in Figure 1 and Figure 2, the die cavity of tubular die 13 regulates ring 16 built with tubular,
Preprocessing hollow blank 14 is placed in regulation ring 16, and the 4th, described mandrel divides lobe punch pull bar
6th, lobe punch the 7th, supporting plate 12 is divided to be integrally placed in the inner tube of preprocessing hollow blank 14, cylinder
At least two screw (not shown) is set in the cavity lateral surrounding of shape die 13, regulation
Screw rod 15 is screwed onto in screw and regulates ring 16 against tubular, is used for the regulation ring 16 of adjustment
Center, thus ensure that the center of the inner tube of preprocessing hollow blank 14 and a point lobe punch draw
Bar 6 center is consistent, the expression lobes 71 of so each point of lobe punch 7 and hollow blank 14
The distance of inner tubal wall equal, the ring muscle of extrusion molding is overall uniformly.
As shown in Fig. 1, Fig. 7, Fig. 8, Fig. 9, the bottom of punch rail plate 10 is provided with T
Type guide rail 101, the T-shaped chute that point lobe punch sliding floor 11 is correspondingly provided with radial direction (is schemed not
Depending on going out), the T-shaped guide rail 101 of described punch rail plate 10 is placed in point lobe punch and slides
In the T-shaped chute of base plate 11.
The extrusion forming method 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 14 handled well
Put into tubular die 13, then regulate adjusting screw rod 15, make regulation ring 16 compress hollow ingot
Material 14；
(2), as shown in Figure 1 and Figure 2, mandrel 4 drops to certain with a point lobe punch 7
Highly, dividing lobe punch 7 to be placed in the inner tube of hollow blank 14, then supporting plate 12 is by ejecting
Cylinder ejects rising, holds a point lobe punch sliding floor 11, and then mandrel 4 moves downward, profit
Divide in chute on point lobe punch sliding floor 11 for the lobe punch 7 with conic section driving and radially transport
Dynamic, as shown in Figure 10 (with two pieces of points of lobe punch 7 for signal), two pieces of points of lobe punch 7
The inner tube wall of expression lobes 71 extruded hollow blank 14 respectively, after having extruded a passage,
As shown in figure 11, the formation of the internal face of hollow blank 14 two is corresponding with expression lobes 71
Pit 141, certain owing to existing between the expression lobes 71 of two pieces of points of lobe punch 7
There is gap between room 78, and two pieces of points of lobe punch 7, so in extrusion process hollow
The sky that the part that the inwall of heart blank 14 is not extruded can be deposited between expression lobes 71
Position 78 is done Plastic Flow and is formed radially protuberance 142 (instead squeezing a part of metal flowing),
It is more uniform that this ensures that the inwall of hollow blank 14 is plastically deformed ratio to a certain extent, subtracts simultaneously
Small core shaft 4 pushes the active force of point lobe punch 7, mandrel 4 backhaul, then divides lobe punch 7
Under the effect of extension spring 9 in the chute of point lobe punch sliding floor 11 automatic homing；
(3), after mandrel 4 extrudes identical height to above-mentioned 2nd step down again, supporting plate 12
Point lobe punch sliding floor is driven the 11st, to divide lobe punch 7 and point lobe punch pull bar 6 at mandrel 4
Centre bore 41 in rotate to an angle, reach expression lobes 71 and the footpath of point lobe punch 7
To protuberance 142 corresponding positions, then recycle the extruding action of the 2nd step above, such as figure
13rd, shown in Figure 12, the radial direction protuberance 142 of hollow blank 14 is in the extruding of point lobe punch 7
Under, radially protuberance 142 has been driven plain consistent with the bottom surface of pit 141, and a point lobe punch 7 continues
Continuous extruding, radial direction protuberance 142 originally has been forced out second pit more deeper than pit 141
1421 (as shown in figure 14), after extruding finishes, a point lobe punch 7 is retracted from the second pit 1421
In exit, supporting plate 12 rotates a certain angle again, again carry out to pit 141 extruding (as
Shown in Figure 15), squeeze the annular muscle of a week, after reaching the requirement of processing, same point of mandrel 4
The 6th, lobe punch pull bar divides lobe punch the 7th, pull bar fixed plate 1 to drop to next annular muscle together
Position, repeat action above, eventually form the shell part 3 of qualified band muscle
(as shown in Figure 3).
This manufacturing process uses the mode of point lobe punch 7, utilizes the axially-movable of mandrel 4,
The principle loading according to wedge, makes each point of lobe punch 7 produce radial motion, and then makes to be connect
The hollow blank 14 touching produces radially and axially flows, and produces the muscle of hoop.When a point lobe punch
7 when being loaded into certain depth, axially contracts certain degree of depth, then divides lobe punch 7 to rotate
Certain angle, rotates to the position not just now being expressed to, then extrude identical with last time
The degree of depth, owing to when point lobe punch 7 designs, radial compression protruding 71 adjacent with two divides lobes
Between the expression lobes 71 of punch 7, the size in room 78 has corresponding relation, thus footpath
Do not have to extruding in the range of applied material can be completely covered on hoop in arc length
The metal of deformation.After this time having loaded, the whole hoop at barrel has been fully completed necessarily
The extruding of the degree of depth.
In addition, increase with the degree of depth travelling radially of point lobe punch 7, the room 78 of generation
Size also becomes larger, and the present invention can come certainly according to the diameter of Shaped shell class part
Surely the quantity of lobe is divided, as in figure 2 it is shown, 7 points of lobe punch 7 of 8 pieces of points of lobe punch are placed in hollow
In the inner tube of blank 14, when each radial compression, each point of lobe punch 7 is radially being executed
The circumferential area adding only accounts for the 1/8 of whole hoop, and therefore required radial load just can be significantly
Reduce, and, point lobe punch 7 structure can effectively prevent the metal stream when follow-up extruding
Dynamic unstability or generation fold.
As shown in figure 11, this figure is only drawn 2 pieces of points of lobe punch 7 and is placed in the interior of hollow blank 14
Pipe is for simplifying drawing, being beneficial to better illustrate the manufacturing process principle of the present invention, as
Shown in Figure 11, point lobe punch 7, after the interval radial compression certain depth in A district, is return,
Then rotate counterclockwise in the interval range in B district, radial compression certain depth.With this type of
Pushing away, a point lobe punch 7 is rotated counterclockwise by C district.
Claims (1)
1. the extrusion forming method of a magnesium alloy shell class part ring muscle, it is characterised in that: step is:
(1), when, working, first the hollow blank handled well is put into tubular die；
(2), at least two pieces of points of lobe punch are symmetrically placed in the inner tube of hollow blank, the outer arcuate wall dividing lobe punch is provided with arc expression lobes, drive a point lobe punch radial motion, divide the inner tube wall of the arc expression lobes extruded hollow blank respectively of lobe punch, there is certain room between the arc expression lobes of two pieces of points of lobe punch, the arc length dividing the arc expression lobes of lobe punch is more than the distance in room between the arc expression lobes of point lobe punch adjacent two-by-two, the room that the part not being extruded at the inwall of extrusion process hollow core blank can be deposited between arc expression lobes is done Plastic Flow and is formed radially protuberance, and then make contacted hollow blank produce radially and axially flow, produce the muscle of hoop, then lobe punch automatic homing is divided；
(3), lobe punch is divided to rotate to an angle, reach the arc expression lobes dividing lobe punch and radially swell corresponding position, then the extruding action of the 2nd step above is recycled, after extruding finishes, point lobe punch is retracted, having squeezed the annular muscle of a week, after reaching the requirement of processing, point lobe punch reaches the position of next annular muscle, repeat action above, eventually form the shell part of qualified band muscle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270125.1A CN103341513B (en) | 2013-06-17 | 2013-06-17 | A kind of extrusion forming method of magnesium alloy shell class part ring muscle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270125.1A CN103341513B (en) | 2013-06-17 | 2013-06-17 | A kind of extrusion forming method of magnesium alloy shell class part ring muscle |
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| CN103341513A CN103341513A (en) | 2013-10-09 |
| CN103341513B true CN103341513B (en) | 2016-10-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567248B (en) * | 2013-10-21 | 2016-01-06 | 中北大学 | A kind of inside and outside compromise face band muscle cylinder extrusion molding dies |
| CN106216472B (en) * | 2016-06-30 | 2018-02-02 | 中北大学 | A kind of umbellate form housing member warm-extrusion forming method |
| CN106180507B (en) * | 2016-07-28 | 2018-06-19 | 江苏太平洋精锻科技股份有限公司 | Thin wall cylinder inner wall second radially inner ring forming technology |
| CN106424188B (en) * | 2016-09-01 | 2018-02-02 | 中北大学 | Hollow blank shapes the rotary extradition forming die of large ratio of height to width inner ring muscle |
| CN106363031B (en) | 2016-09-01 | 2018-01-09 | 中北大学 | Hollow blank shapes the rotary extrusion forming method of large ratio of height to width inner ring muscle |
| CN108480411B (en) * | 2018-04-03 | 2020-04-14 | 北京科技大学 | Strong plastic deformation extrusion forming device and method for magnesium alloy ribbed cylindrical part |
| 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 |
| CN112692088A (en) * | 2020-12-23 | 2021-04-23 | 北京航星机器制造有限公司 | Barrel component hot extrusion die and forming method |
| CN113084053B (en) * | 2021-03-25 | 2022-01-04 | 武汉理工大学 | Rolling extrusion composite near-net forming method for large inner contour abrupt cross-section ring piece |
| CN113369326B (en) * | 2021-06-11 | 2022-11-25 | 中国兵器工业第五九研究所 | Open inner type progressive extrusion forming die based on current auxiliary heating |
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| GB0016595D0 (en) * | 2000-07-07 | 2000-08-23 | Moyes Peter B | Deformable member |
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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 |
| 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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