CN107282680B - Flow guiding protection type extrusion die - Google Patents
Flow guiding protection type extrusion die Download PDFInfo
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- CN107282680B CN107282680B CN201710643282.0A CN201710643282A CN107282680B CN 107282680 B CN107282680 B CN 107282680B CN 201710643282 A CN201710643282 A CN 201710643282A CN 107282680 B CN107282680 B CN 107282680B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 57
- 238000009826 distribution Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 23
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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Abstract
The invention discloses a flow guide protection type extrusion die which comprises an upper die and a lower die, wherein a die hole for forming a semi-hollow section is formed in the lower die, a first flow dividing hole and a second flow dividing hole are formed in the upper die, a flow dividing bridge is arranged between the first flow dividing hole and the second flow dividing hole, and when the upper die is matched with the lower die, the end face, close to the lower die, of the flow dividing bridge is located in the range enclosed by the die holes. Because the terminal surface that the reposition of redundant personnel bridge is close to the lower mould lies in the within range that the nib encloses, the reposition of redundant personnel bridge has the effect of sheltering from to the cantilever that encloses by the nib, when the extrusion, the metal liquid can not cause the impact by last mould to lower mould direction to the cantilever, during extrusion simultaneously, the metal liquid is through the first reposition of redundant personnel hole that lies in the nib both sides, the inflow of second reposition of redundant personnel hole, and get into the nib by the both sides of nib, the atress of reducible cantilever, reduce the moment of flexure that the cantilever root received promptly, improve the intensity of mould.
Description
Technical Field
The invention relates to the technical field of forming dies, in particular to a flow guide protection type extrusion die.
Background
With the continuous progress of the manufacturing technology, profiles with different specifications and varieties appear, wherein the application of the semi-hollow profile is wider.
The main production process of the semi-hollow section is extrusion molding by using a die. The semi-hollow section has a cantilever surrounded by a die hole, and due to various defects of the design of the traditional extrusion die, the cantilever is stressed greatly and is easy to deflect.
Disclosure of Invention
Based on the above, the invention provides a diversion protection type extrusion die for reducing the stress of a cantilever, which overcomes the defects of the prior art.
The technical scheme is as follows:
the utility model provides a water conservancy diversion protection formula extrusion die, includes mould and lower mould, be equipped with the nib that is used for the half hollow section bar of shaping on the lower mould, be equipped with first reposition of redundant personnel hole and second reposition of redundant personnel hole on going up the mould, first reposition of redundant personnel hole with be equipped with the reposition of redundant personnel bridge between the second reposition of redundant personnel hole, work as go up the mould with during the lower mould cooperation, the reposition of redundant personnel bridge is close to the terminal surface of lower mould is located the within range that the nib encloses.
Above-mentioned water conservancy diversion protection formula extrusion die, because the terminal surface that the reposition of redundant personnel bridge is close to the lower mould is located the within range that the nib encloses, the reposition of redundant personnel bridge has the effect of sheltering from to the cantilever that encloses by the nib, when the extrusion, the metal liquid can not cause the impact by last mould to lower mould direction to the cantilever, during extrusion simultaneously, the metal liquid is through the first reposition of redundant personnel hole that is located the nib both sides, the inflow of second reposition of redundant personnel hole, and get into the nib by the both sides of nib, the power that the metal liquid of different sides produced can offset each other, the atress of reducible cantilever, reduce the moment of flexure that the cantilever root received promptly, the intensity of improvement. In addition, the structure does not have the traditional mold core of the upper mold and the welding chamber of the lower mold, and is simple in structure and easy to process.
In one embodiment, the lower die comprises a first cantilever and a second cantilever which are enclosed by the die hole, the ends of the first cantilever and the second cantilever are arranged oppositely, the die hole comprises a spacing hole section which is positioned between the first cantilever and the second cantilever, a diversion trench is arranged on the side surface of the diversion bridge close to the lower die, the first diversion hole and the second diversion hole are communicated through the diversion trench, and the diversion trench and the spacing hole section are arranged oppositely. Above-mentioned structure, the guiding gutter can guarantee that the reposition of redundant personnel bridge can not cover interval hole section, guarantees that the molten metal can get into interval hole section smoothly, and the molten metal in first reposition of redundant personnel hole, the second reposition of redundant personnel hole simultaneously is just to the tip of first cantilever and second cantilever along the guiding gutter entering interval hole section, and the direction that the molten metal flows does not just produce forward pressure to the tip of first cantilever and second cantilever, has improved the intensity of mould. In addition, the metal liquid entering the flow guide groove is respectively provided by the first flow dividing hole and the second flow dividing hole, the extrusion forces generated by the metal liquid on different sides can be mutually offset, the pressure generated on the end parts of the first cantilever and the second cantilever can be reduced as much as possible, the molding effect of the die hole is ensured, and the die strength is improved.
In one embodiment, the width of one end of the shunting bridge far away from the lower die is 2 mm-4 mm larger than the length of the spacing hole section. The reposition of redundant personnel bridge should guarantee can not take place great deformation under the impact of the metal liquid in first reposition of redundant personnel hole, second reposition of redundant personnel hole, nevertheless the width of reposition of redundant personnel bridge should not too big simultaneously, and too big pressurized area that will make the reposition of redundant personnel bridge increases, makes the reposition of redundant personnel simultaneously and compares and reduce, leads to the extrusion force that receives to increase, consequently keeps away from the reposition of redundant personnel bridge the width of the one end of lower mould sets up to 2mm ~ 4mm big than the length of interval hole section.
In one embodiment, one end of the diversion bridge, which is close to the lower die, is provided with a first chamfer portion, the first chamfer portion is arranged opposite to the diversion trench, the included angles between the two side walls of the first chamfer portion and the vertical direction are the same, and the included angle between the two side walls of the first chamfer portion is 55-65 °. The metal liquid in the first reposition of redundant personnel hole and the second reposition of redundant personnel hole gets into the guiding gutter through the both sides wall of first chamfer in, consequently when the both sides wall of first chamfer is the same with the contained angle of vertical direction, the volume that different reposition of redundant personnel holes got into the metal liquid of guiding gutter is close, the extrusion force of production can offset each other, can reduce the extrusion force to first cantilever, the tip of second cantilever, simultaneously when the contained angle of the both sides wall of first chamfer is 55 ~ 65, the effect that first chamfer portion guided the metal liquid in different reposition of redundant personnel holes to the guiding gutter in is better, be favorable to the extrusion of interval hole section part.
In one embodiment, one end of the flow distribution bridge, which is close to the lower die, is further provided with a second chamfer and a third chamfer, the second chamfer, the first chamfer and the third chamfer are sequentially arranged along the length direction of the flow distribution bridge, the second chamfer is arranged opposite to the first cantilever, the third chamfer is arranged opposite to the second cantilever, and chamfers of the second chamfer and the third chamfer are both 25 ° to 35 °. The chamfer structure of second chamfer and third chamfer can guarantee that the metal liquid in first reposition of redundant personnel hole, the second reposition of redundant personnel hole gets into the nib more smoothly, and the in-process that the inner wall of reposition of redundant personnel bridge flowed is followed to the metal liquid simultaneously, and the reducible impact to first cantilever, second cantilever is improved the intensity of mould not by the direction entering nib to the lower mould.
In one embodiment, when the upper die is matched with the lower die, the minimum distance between the end surface of the shunting bridge close to the lower die and the die hole is 3-5 mm. At the moment, the impact of the molten metal on the cantilever can be reduced, the strength of the die is improved, and meanwhile, the shunt bridge cannot block the molten metal from entering the die hole, so that the forming effect is guaranteed.
In one embodiment, the shunting bridge is in clearance fit with the lower die, and the clearance between the shunting bridge and the lower die is 0.15-0.25 mm. The shunting bridge can generate deflection towards the lower die when bearing the impact of molten metal, so a gap is arranged between the shunting bridge and the lower die, and the shunting bridge is prevented from touching the lower die when being deflected to generate pressure on the cantilever. Meanwhile, metal enters the gap due to too large gap and exerts force on the cantilever, and the gap is too small to ensure that the shunting bridge cannot touch the lower die when being bent, so that the gap is set to be 0.15-0.25 mm.
In one embodiment, the inner wall of the first diversion hole far away from the diversion bridge comprises a bulge arranged in the direction close to the diversion bridge, the bulge is positioned in the middle of the inner wall, and the second diversion hole is arranged symmetrically to the first diversion hole. The velocity of flow of the every place metal liquid in the first reposition of redundant personnel orifice tends to unanimity this moment, can not produce the difference because the different extrusion forces that lead to receiving of velocity of flow everywhere when the shaping, can reduce the pressure to the cantilever, and first reposition of redundant personnel orifice sets up with second reposition of redundant personnel orifice symmetry simultaneously, and the flow of the metal liquid of different sides is close, and the extrusion force that the metal liquid of different sides produced can offset each other when sticis the shaping, also can reduce the pressure to the cantilever, improves the intensity of mould.
In one embodiment, a working belt matched with the die hole is arranged on the side surface of the lower die close to the upper die, the side wall of the working belt is an inclined surface, and the die hole is formed in the bottom surface of the working belt. The working belt can guide the molten metal into the die hole, so that the extrusion force of the molten metal on the lower die and the cantilever is reduced.
In one embodiment, the flow-guiding protection type extrusion die further includes a limiting member, a notch is formed in the lower die, a protrusion matched with the notch is formed in the upper die, the limiting member penetrates through the lower die, and a mating hole matched with the limiting member is formed in the upper die. The protruding portion can prevent with the cooperation of notch that mould and lower mould from taking place the condition of mutual translation, and the lower mould is worn to establish by the locating part to can cooperate with the mating holes of last mould, can prevent to go up mould and lower mould and produce relative rotation, guarantee to go up mould and lower mould cooperation stable, be favorable to improving extrusion's effect.
Drawings
FIG. 1 is a top view of a flow-guiding protected extrusion die according to an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic diagram of the die hole and the shunt bridge according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a shunt bridge according to an embodiment of the present invention;
FIG. 5 is a view taken along line K of FIG. 4;
FIG. 6 is a sectional view taken along line B-B of FIG. 4;
FIG. 7 is a cross-sectional view taken along line C-C of FIG. 4;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 4;
fig. 9 is a sectional view taken along line E-E of fig. 4.
Description of reference numerals:
100. the die comprises an upper die, 110, a first flow dividing hole, 111, a bulge, 120, a second flow dividing hole, 130, a flow dividing bridge, 131, a flow guide groove, 132, a first chamfer part, 133, a second chamfer part, 134, a third chamfer part, 135, a fourth chamfer part, 140, a protruding part, 200, a lower die, 210, a die hole, 211, a spacing hole section, 220, a first cantilever, 230, a second cantilever, 300 and a limiting part.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
In this embodiment, the flow guide protection type extrusion die is used for producing an aluminum profile, but the material of the profile can be changed correspondingly according to production requirements.
In this embodiment, the diversion protection type extrusion die is used for producing a narrow and long semi-hollow profile with a cross section length-width ratio larger than 3, but the diversion protection type extrusion die can also be used for producing other types of profiles in order to reduce the difficulty of die processing and reduce the consumption of die materials.
As shown in fig. 1 to 3, the flow guide protection type extrusion die includes an upper die 100 and a lower die 200, a die hole 210 for forming a semi-hollow profile is formed in the lower die 200, a first diversion hole 110 and a second diversion hole 120 are formed in the upper die 100, a diversion bridge 130 is disposed between the first diversion hole 110 and the second diversion hole 120, and when the upper die 100 is matched with the lower die 200, an end surface of the diversion bridge 130 close to the lower die 200 is located in a range surrounded by the die hole 210. Above-mentioned water conservancy diversion protection formula extrusion die, because the terminal surface that reposition of redundant personnel bridge 130 is close to lower mould 200 is located the within range that the nib 210 encloses, reposition of redundant personnel bridge 130 has the effect of sheltering from to the cantilever that is enclosed by the nib 210, when the extrusion, the metal liquid can not cause the impact by last mould 100 to lower mould 200 direction to the cantilever, during extrusion simultaneously, the metal liquid is through the first reposition of redundant personnel hole 110 that is located the nib 210 both sides, the inflow of second reposition of redundant personnel hole 120, and get into the nib 210 by the both sides of nib 210, the power that the metal liquid of different sides produced can offset each other, the pressure that reducible cantilever received, reduce the moment of flexure that the cantilever root bore promptly, improve the intensity of mould. In addition, the structure does not have the traditional welding chamber of the mold core of the upper mold 100 and the lower mold 200, and is simple in structure and easy to process.
In this embodiment, the outer diameters of the upper die 100 and the lower die 200 are both 200mm, the thickness is 65mm, the strength of the die is high, and the manufacturing cost is low.
As shown in fig. 3, the lower mold 200 includes a first cantilever 220 and a second cantilever 230 surrounded by a mold hole 210, ends of the first cantilever 220 and the second cantilever 230 are disposed opposite to each other, the mold hole 210 includes a spacing hole section 211 located between the first cantilever 220 and the second cantilever 230, a diversion trench 131 is disposed on a side of the diversion bridge 130 close to the lower mold 200, the first diversion hole 110 and the second diversion hole 120 are communicated through the diversion trench 131, and the diversion trench 131 and the spacing hole section 211 are disposed opposite to each other. Above-mentioned structure, diversion trench 131 can guarantee that reposition of redundant personnel bridge 130 can not cover interval hole section 211, guarantee that the molten metal can get into interval hole section 211 smoothly, simultaneously first diversion hole 110, the molten metal in the second diversion hole 120 gets into interval hole section 211 along diversion trench 131 in, the direction that the molten metal flows does not just to the tip of first cantilever 220 and second cantilever 230, can reduce the forward pressure to the tip production of first cantilever 220 and second cantilever 230, the intensity of mould has been improved. In addition, the molten metal entering the guiding groove 131 is provided by the first flow dividing hole 110 and the second flow dividing hole 120, so that the extrusion forces generated by the molten metal on different sides can be offset, the pressure generated on the end parts of the first cantilever 220 and the second cantilever 230 can be reduced as much as possible, the molding effect of the die hole 210 is ensured, and the die strength is improved.
In this embodiment, as shown in fig. 1, the depth a of the guiding groove 131 is 16mm, so that the molten metal can smoothly enter the guiding groove 131, and the molten metal in the guiding groove 131 does not generate a large pressure on the end portions of the first cantilever 220 and the second cantilever 230.
In this embodiment, be equipped with two arc walls of relative setting on the tip of second cantilever 230, two arc walls enclose into interior recess on second cantilever 230, and two arc walls all communicate with interval hole section 211, and interval hole section 211 and two arc walls all are located the within range that the inner wall of guiding gutter 131 encloses. Because the structure of interval hole section 211 department is comparatively complicated, in order to guarantee that the metal liquid gets into interval hole section 211 and two arc walls smoothly, with interval hole section 211 and two arc walls of the scope cover of guiding gutter 131, guarantee extrusion's effect.
Optionally, as shown in fig. 2, a dimension b of the guiding gutter 131 in the length direction of the die hole 210 is 12mm, so that the molten metal can be ensured to smoothly enter the die hole 210, and the molten metal can be ensured not to generate a large pressure on the end portions of the first cantilever 220 and the second cantilever 230.
As shown in fig. 1 and 4, the width c of the end of the shunting bridge 130 away from the lower die 200 is 2mm to 4mm greater than the length d of the spacing hole segment 211. The shunting bridge 130 should guarantee that major deformation can not take place under the impact of the molten metal in first reposition of redundant personnel hole 110, second reposition of redundant personnel hole 120, nevertheless the width of shunting bridge 130 should not too big simultaneously, and too big will make the pressurized area of shunting bridge 130 increase, makes the split ratio reduce simultaneously, leads to the extrusion force that receives to increase, consequently sets up the width that shunts bridge 130 keeps away from the one end of lower mould 200 to 2mm ~ 4mm big than the length of interval hole section 211.
Optionally, the width c of one end of the shunting bridge 130 away from the lower die 200 is 24mm, at this time, the shunting bridge 130 is not easy to deform, and meanwhile, the shunting bridge 130 has a small influence on the fluidity of the molten metal.
As shown in fig. 4 to 6, a first chamfer 132 is further disposed at one end of the diversion bridge 130 close to the lower die 200, the first chamfer 132 is disposed opposite to the diversion trench 131, two side walls of the first chamfer 132 have the same included angle with the vertical direction, and the included angle between the two side walls of the first chamfer 132 is 55 ° to 65 °. The molten metal in the first and second diversion holes 110 and 120 enters the diversion trench 131 through the two side walls of the first chamfer 132, so when the included angles between the two side walls of the first chamfer 132 and the vertical direction are the same, the amounts of the molten metal entering the diversion trench 131 through different diversion holes are similar, the generated extrusion forces can be mutually offset, the extrusion forces on the end parts of the first and second cantilevers 220 and 230 can be reduced, and meanwhile, when the included angles between the two side walls of the first chamfer 132 are 55-65 degrees, the effect of guiding the molten metal in different diversion holes to the diversion trench 131 by the first chamfer 132 is better, and the extrusion molding of the interval hole section 211 part is facilitated.
Optionally, the included angle between the two sidewalls of the first chamfered portion 132 is 60 °. The guiding effect of the first chamfered portion 132 is better at this time.
As shown in fig. 4 to 8, a second chamfer 133 and a third chamfer 134 are further provided at one end of the flow dividing bridge 130 close to the lower die 200, the second chamfer 133, the first chamfer 132 and the third chamfer 134 are sequentially arranged along the length direction of the flow dividing bridge 130, the second chamfer 133 is arranged opposite to the first cantilever 220, the third chamfer 134 is arranged opposite to the second cantilever 230, and the chamfers of the second chamfer 133 and the third chamfer 134 are both 25 ° to 35 °. The chamfer structure of the second chamfer 133 and the third chamfer 134 can ensure that the molten metal in the first diversion hole 110 and the second diversion hole 120 can enter the die hole 210 more smoothly, and meanwhile, the molten metal does not enter the die hole 210 from the direction opposite to the lower die 200 in the process of flowing along the inner wall of the diversion bridge 130, so that the impact on the first cantilever 220 and the second cantilever 230 can be reduced, and the strength of the die is improved.
Alternatively, the second chamfered portion 133 and the third chamfered portion 134 are both chamfered by 30 °, the width of the end surface of the second chamfered portion 133 close to the lower die 200 is 6mm, and the width of the end surface of the third chamfered portion 134 close to the lower die 200 is 12 mm. The matching effect of the shunt bridge 130 and the die hole 210 is better.
In this embodiment, as shown in fig. 9, the shunt bridge 130 further includes a fourth chamfer portion 135, the fourth chamfer portion 135 is disposed on a side of the third chamfer portion 134 away from the first chamfer portion 132, a concave T-shaped convex portion is disposed on a side of the second cantilever 230 close to the root, and a chamfer angle of one side of the fourth chamfer portion 135 close to the T-shaped convex portion is higher than a chamfer angle of the other side of the fourth chamfer portion 135.
As shown in fig. 3, when the upper mold 100 is engaged with the lower mold 200, the minimum distance e between the end surface of the shunting bridge 130 close to the lower mold 200 and the mold hole 210 is 3mm to 5 mm. At this time, the impact of the molten metal on the cantilever can be reduced, the strength of the mold is improved, and meanwhile, the shunt bridge 130 can not obstruct the molten metal from entering the mold hole 210, so that the molding effect is ensured.
As shown in fig. 2, the shunting bridge 130 is in clearance fit with the lower die 200, and the clearance f between the shunting bridge 130 and the lower die 200 is 0.15mm to 0.25 mm. Since the shunting bridge 130 is deflected toward the lower die 200 when it receives an impact of molten metal, a gap is provided between the shunting bridge 130 and the lower die 200 to prevent the shunting bridge 130 from contacting the lower die 200 and pressing the cantilever when it is deflected. Meanwhile, too large a gap may cause metal to enter the gap, exerting a force on the cantilever, and too small a gap may not ensure that the shunting bridge 130 may not touch the lower mold 200 when deflected, so the gap f is set to 0.15mm to 0.25 mm. Optionally, the gap f between the shunting bridge 130 and the lower die 200 is 0.2mm, and the above-mentioned effect can be better achieved at this time.
As shown in fig. 1, the inner wall of the first flow dividing hole 110, which is far away from the flow dividing bridge 130, includes a protrusion 111 disposed in a direction close to the flow dividing bridge 130, the protrusion 111 is located in the middle of the inner wall, and the second flow dividing hole is disposed symmetrically to the first flow dividing hole. At this moment, the flow rates of the metal liquid in each position in the first flow dividing hole 110 tend to be consistent, the difference of the received extrusion force caused by the difference of the flow rates in each position can be avoided during forming, the pressure on the cantilever can be reduced, meanwhile, the first flow dividing hole 110 and the second flow dividing hole 120 are symmetrically arranged, the flow rates of the metal liquid on different sides are close, the extrusion forces generated by the metal liquid on different sides can be mutually offset during pressing and forming, the pressure on the cantilever can be reduced, and the strength of the die is improved.
The inner diameters of the first flow dividing hole 110 and the second flow dividing hole 120 are not larger than 110mm, the flow dividing ratio of the first flow dividing hole 110 to the second flow dividing hole 120 is 30% -40% of the extrusion ratio of extrusion molding of the semi-hollow profile, the flow velocity of molten metal at each position in the first flow dividing hole 110 and the second flow dividing hole 120 is consistent, meanwhile, the extrusion force is matched with the width of the flow dividing bridge 130, and the improvement of the strength of a die and the improvement of the quality of extrusion molding are facilitated.
In this embodiment, the molten metal is extruded by an extruder, the inner diameter of an extrusion cylinder of the extruder is 125mm, the specific pressure of the extruder is 653MPa, and the extrusion ratio is 62.3, so that the extrusion force generated during extrusion by the extruder does not exceed the strength of the die, and the cost is low.
The side surface of the lower die 200 close to the upper die 100 is provided with a working band matched with the die hole 210, the side wall of the working band is an inclined surface, and the die hole 210 is arranged on the bottom surface of the working band. The working tape can guide molten metal into the die holes 210, reducing the extrusion force of the molten metal on the lower die 200 and the cantilever.
As shown in fig. 2, the flow-guiding protection type extrusion die further includes a limiting member 300, a notch is disposed on the lower die 200, a protrusion 140 matched with the notch is disposed on the upper die 100, the limiting member 300 penetrates through the lower die 200, and a mating hole matched with the limiting member 300 is disposed on the upper die 100. The protruding part 140 can prevent the situation that the upper die 100 and the lower die 200 are translated with each other by matching with the notch, the limiting part 300 penetrates through the lower die 200 and can be matched with the matching hole of the upper die 100, the upper die 100 and the lower die 200 can be prevented from rotating relatively, the upper die 100 and the lower die 200 can be stably matched, and the extrusion molding effect can be improved. Optionally, the position limiter 300 includes a positioning column and/or a positioning pin.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A flow guide protection type extrusion die is characterized by comprising an upper die and a lower die, wherein a die hole for forming a semi-hollow section is formed in the lower die, a first flow dividing hole and a second flow dividing hole are formed in the upper die, a flow dividing bridge is arranged between the first flow dividing hole and the second flow dividing hole, a flow guide groove is formed in the side face, close to the lower die, of the flow dividing bridge, when the upper die is matched with the lower die, the end face, close to the lower die, of the flow dividing bridge is located in the range enclosed by the die hole, the lower die comprises a first cantilever and a second cantilever which are enclosed by the die hole, the end portions of the first cantilever and the second cantilever are oppositely arranged, the die hole comprises a spacing hole section located between the first cantilever and the second cantilever, the width, far away from one end of the lower die, of the flow dividing bridge is 2-4 mm larger than the length of the spacing hole section, one end of the shunting bridge, which is close to the lower die, is provided with a first chamfer part, a second chamfer part, a third chamfer part and a fourth chamfer part, the first chamfer part and the diversion trench are arranged oppositely, the second chamfer part, the first chamfer part and the third chamfer part are sequentially arranged along the length direction of the shunting bridge, the second chamfer part and the first cantilever are arranged oppositely, the third chamfer part and the second cantilever are arranged oppositely, the fourth chamfer part is arranged at one side, which is far away from the first chamfer part, of the third chamfer part, one side, which is close to the root part, of the second cantilever is provided with an inwards concave T-shaped convex part, one side chamfer part, which is close to the T-shaped convex part, of the fourth chamfer part is higher than the other side chamfer part of the fourth chamfer part, the extruder is further provided, the extruder is used for extruding molten metal, and the specific pressure of the extruder is 653MPa, the extrusion ratio of the extruder is 62.3, two arc-shaped grooves which are oppositely arranged are arranged at the end part of the second cantilever, the two arc-shaped grooves surround the second cantilever to form an inner concave part, the two arc-shaped grooves are communicated with the spacing hole section, and the spacing hole section and the two arc-shaped grooves are positioned in the range surrounded by the inner wall of the flow guide groove.
2. The flow-guiding protection type extrusion die of claim 1, wherein the first flow-dividing hole and the second flow-dividing hole are communicated through the flow-guiding groove, and the flow-guiding groove is arranged opposite to the spacing hole section.
3. The flow-guiding protection type extrusion die of claim 1, wherein the included angle between the two side walls of the first chamfer part and the vertical direction is the same, and the included angle between the two side walls of the first chamfer part is 55-65 °.
4. The flow-guide protected extrusion die of claim 3, wherein the second chamfer and the third chamfer are both chamfered at 25 ° to 35 °.
5. The flow guide protection type extrusion die of claim 1, wherein when the upper die is matched with the lower die, the minimum distance between the end surface of the flow distribution bridge close to the lower die and the die hole is 3-5 mm.
6. The flow guide protection type extrusion die of claim 1, wherein the flow distribution bridge is in clearance fit with the lower die, and the clearance between the flow distribution bridge and the lower die is 0.15-0.25 mm.
7. The flow-guiding protection type extrusion die of claim 1, wherein the inner wall of the first diversion hole, which is far away from the diversion bridge, comprises a protrusion arranged in the direction close to the diversion bridge, the protrusion is positioned in the middle of the inner wall, and the second diversion hole is arranged symmetrically to the first diversion hole.
8. The flow guide protection type extrusion die of any one of claims 1 to 7, wherein a working belt matched with the die hole is arranged on the side surface of the lower die close to the upper die, the side wall of the working belt is an inclined surface, and the die hole is arranged on the bottom surface of the working belt.
9. The extrusion die of any one of claims 1 to 7, further comprising a stopper, wherein the lower die has a notch, the upper die has a protrusion matching with the notch, the stopper penetrates through the lower die, and the upper die has a mating hole matching with the stopper.
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| CN201710643282.0A CN107282680B (en) | 2017-07-31 | 2017-07-31 | Flow guiding protection type extrusion die |
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| CN107282680B true CN107282680B (en) | 2020-06-30 |
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| CN107931347A (en) * | 2017-11-28 | 2018-04-20 | 福建省南平铝业股份有限公司 | A kind of small big pressure-bearing surface shading type the Aluminum-Extruding Die of opening |
| CN110000234A (en) * | 2018-12-29 | 2019-07-12 | 江阴市江顺模具有限公司 | A kind of sound equipment material aluminium alloy hot-extrusion die |
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| JP2003211217A (en) * | 2002-01-21 | 2003-07-29 | Mitsubishi Alum Co Ltd | Die for extrusion processing and the extrusion processing method using the same |
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| CN105170680A (en) * | 2015-09-08 | 2015-12-23 | 广州科技职业技术学院 | Protective type double-hole extrusion mould for aluminum section bar |
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