CN113458170A

CN113458170A - Section bar extrusion die

Info

Publication number: CN113458170A
Application number: CN202010236731.1A
Authority: CN
Inventors: 蒋成龙
Original assignee: Zhongyifeng Luopskin Aluminum Co ltd
Current assignee: Zhongyifeng Luopskin Aluminum Co ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2021-10-01

Abstract

The invention provides a profile extrusion die which comprises an upper die, a lower die and a die pad. The upper die, the lower die and the die pad are superposed in front and back; the upper die is sequentially provided with two feeding cavities and two different die cores from the feeding surface of the upper die to the discharging surface of the upper die; the lower die is sequentially provided with two different welding chambers and two different die holes from the feeding surface of the lower die to the discharging surface of the lower die; the two welding chambers are matched with the two feeding cavities, the two die holes are matched with the two die cores, the two die cores are accommodated in the two welding chambers, and two die cavities with different shapes are formed; two discharging cavities corresponding to the two die holes are arranged in the die pad in a penetrating mode. Through section bar extrusion device extrudees two kinds of different section bars of shape simultaneously, is showing and is improving production efficiency.

Description

Section bar extrusion die

Technical Field

The invention relates to the field of profile extrusion, in particular to two-hole profile extrusion dies.

Background

Aluminum alloy and other profiles are main materials applied to various products in light weight, however, the existing aluminum profile extrusion dies are mainly designed by single-hole extrusion dies so as to be convenient for workshop field production operation and die repair, but the production efficiency of the single-hole extrusion dies is low, along with the rapid development of the aluminum industry, the high-consumption production cannot form competitiveness, and then the design of the multi-hole extrusion dies is continuously realized, but the multi-hole extrusion dies cannot reach an ideal balance state, the extrusion pressure is high, the extrusion speed is low, the production efficiency is low, the deformation is large, and the front and back discharging is unstable. In addition, among the prior art porous type extrusion die mostly is two hole extrusion die designs of symmetry, and symmetrical arrangement's die cavity direction often is opposite, and the section bar needs install respectively according to different directions, and intensity of labour is big, the error rate is high, spends long time for the host computer can not produce at full speed, and behind two hole die extrusion section bar of symmetry moreover, need fall the frame to the extrusion section bar when pressing from both sides on the surface treatment, increase operation processes, extravagant manual work.

The invention provides two extrusion dies for the two-hole section bars, which have high production efficiency and greatly improve the production efficiency of small orders.

Disclosure of Invention

In order to overcome the technical defects, the invention aims to provide two extrusion dies for the two-hole profile.

The invention discloses a profile extrusion die which comprises an upper die, a lower die and a die pad, wherein a first feeding cavity and a second feeding cavity are arranged on a feeding surface of the upper die, a shunting bridge is arranged in each of the first feeding cavity and the second feeding cavity, each feeding cavity forms two shunting holes through the shunting bridge, and a first die core and a second die core are arranged on one side, facing the lower die, of the upper die in an extending manner;

a first welding chamber, a second welding chamber, a first die hole and a second die hole are arranged on the lower die, the first welding chamber and the second welding chamber are respectively matched with a first feeding cavity and a second feeding cavity, the first die hole and the second die hole are respectively matched with the first die core and the second die core, the first die core and the second die core are accommodated in the first die hole and the second die hole, and a first die cavity and a second die cavity which are different in shape are formed;

and a first discharging cavity and a second discharging cavity which correspond to the first die hole and the second die hole respectively penetrate through the die pad.

Preferably, the feeding cavity is a polygonal cavity with circular arc transition, the feeding cavity is close to the part of the outer edge of the upper die, so that the feeding surface of the upper die extends towards the direction of the discharging surface of the upper die along the feeding surface of the upper die, and the outer edge of the upper die expands and extends, so that the flow rate of liquid passing through the feeding cavity is balanced and the pressure is uniform.

Preferably, the shunting hole is a polygonal cavity with arc transition.

Preferably, the welding chamber is in the shape of a petal with circular arc transition.

Preferably, the shunting bridge sinks compared with the shunting hole bridge, and the section of the shunting bridge is in a water drop shape.

Preferably, two parts of the shunting bridge are provided with piers, each pier is of a slope structure on two sides or a parallel structure, and the piers and the shunting bridge are in circular arc transition.

Preferably, the end surface of the mold core is provided with a step.

Preferably, the welding chamber is divided into two layers, and the depths of the two layers are gradually increased.

Preferably, the lower die is provided with a working belt and an empty cutter, the working belt is provided with a cooling device, and the empty cutter is divided into two stages.

Preferably, the first feeding cavity and the second feeding cavity are the same in shape and size.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1. the production efficiency is high, and is higher than that of a symmetrical two-hole extrusion die by more than 30 percent;

2. two models are often put together for production and the order quantity is not large, and two models of profiles can be extruded at one time by using one die.

Drawings

FIG. 1 is a schematic view of a profile extrusion die for processing a profile in accordance with a preferred embodiment of the present invention;

FIG. 2 is a block diagram of an embodiment of a profile extrusion die according to a preferred embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along plane A-A of FIG. 2;

fig. 4 is a cross-sectional view of a diverter bridge of a profile extrusion die in accordance with a preferred embodiment of the present invention.

FIG. 5 is a schematic structural view of an upper mold according to a preferred embodiment of the present invention;

FIG. 6 is a schematic structural view of a lower mold according to a preferred embodiment of the present invention;

FIG. 7 is a schematic diagram of a die pad according to a preferred embodiment of the present invention;

reference numerals:

10-upper mould;

11-lower die;

12-a die pad;

13-1 a first feed cavity, 13-2 a second feed cavity;

14-a shunt bridge;

15-a shunt hole; 15-1 a first diverter orifice; 15-2 second flow-dividing holes; 15-3 third tapping holes; 15-4 fourth flow-dividing holes;

16-1 a first mold core; 16-2 a second mold core;

17-1 a first die orifice; 17-2 second die holes;

18-step;

19-1 a first welding chamber, 19-2 a second welding chamber;

20-a second cavity;

21-a first cavity;

22-a working band;

23-blank cutter;

24-discharge chamber.

Detailed Description

The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.

Referring to fig. 2 to 7, which are schematic structural diagrams of a profile extrusion die according to a preferred embodiment of the present invention, and referring to fig. 1, which is a schematic structural diagram of a profile extrusion die according to a preferred embodiment of the present invention, the profile extrusion die includes an upper die 10, a lower die 11, and a die pad 12, wherein the upper die 10, the lower die 11, and the die pad 12 are stacked in front of and behind each other and fixedly connected to each other by uniformly distributed bolts, positioning pins, and the like.

Referring to fig. 2, 3 and 5, a first feeding cavity 13-1 and a second feeding cavity 13-2 are formed on a feeding surface of the upper die 10, a diversion bridge 14 is disposed in each of the first feeding cavity 13-1 and the second feeding cavity 13-2, each feeding cavity forms two diversion holes through the diversion bridge 14, and a first die core 16-1 and a second die core 16-2 with different shapes are extended from one side of the upper die 10 facing the lower die 11. The shape of the mold core is designed according to the shape of the section bar.

Center, feed point of upper die 10

Referring to fig. 2, the feeding point of the upper die 10 can be set to be a hemispherical boss, so that the supporting and shunting effects can be achieved, and the friction effect between the aluminum material and the die can be reduced, so that the aluminum material can enter the feeding cavity and the shunting hole 15 of the boss in two weeks more easily, the extrusion pressure is low, the rapid extrusion can be achieved, and the production efficiency of the aluminum profile is greatly improved.

Feed chambers 13-1, 13-2

Referring to fig. 2, since the flow rate of the molten metal near the center of the upper die 10 is greater than that near the edge of the upper die 10, for balancing the flow rate, the stability of discharging is improved, the feeding cavity can be designed to be a polygonal cavity with arc transition, such as a polygonal cavity with symmetric distribution, irregular shape, and rounded corners or chamfers (such as a hexagonal design in the drawing), and from the feeding surface of the upper die 10, the feeding surface of the upper die 10 expands and extends toward the discharging surface of the upper die 10 along the direction from the feeding surface of the upper die 10, so that the flow rate of the molten metal passing through the feeding cavity 13 is balanced and the pressure is uniform. For example, the feeding cavity 13 may be designed to extend perpendicularly to the feeding surface toward the lower mold 11 at a position near the center of the upper mold 10, and to extend in an expanding manner toward the lower mold 11 at a position near the edge of the feeding surface, the expanding direction being at an obtuse angle with respect to the feeding surface.

-a tap hole 15

Referring to fig. 2, the diversion holes 15 may also be designed as polygonal cavities with circular arc transition, such as polygonal design with rounded corners or chamfers (e.g. triangular or two-sided design in the figure), so that the diversion holes 15 near the center of the upper die 10 are smaller, and the diversion holes 15 far from the center of the upper die 10 are larger, so that the flow rate of molten metal passing through the diversion holes 15 is balanced and the pressure is uniform. In order to balance the flow velocity and improve the stability of discharging, the first flow dividing hole 15-1 and the second flow dividing hole 15-2 can be designed to be approximate to a quadrangle, and the third flow dividing hole 15-3 and the second flow dividing hole 15-4 can also be designed to be approximate to a quadrangle.

In order to reduce extrusion force, prolong the service life of the die and improve extrusion speed, each shunting hole 15 can be provided with a conical die angle which is 10-15 degrees, and continuously-changed die angles such as a streamline die, a flat streamline die, a bowl die and the like can also be adopted.

-a shunt bridge 14

Referring to fig. 2 and 3, the diversion bridge 14 may be set to sink compared with the diversion hole 15, as shown in fig. 4, the cross section of the diversion bridge 14 is designed to be symmetrical drop-shaped, taking the profile structure shown in fig. 1 as an example, the widest part of the diversion bridge 14 is 14mm, the length is 45mm, and the inclination of the drop-shaped symmetry is 10 °.

In addition, the bridge piers can be arranged at two parts of the shunt bridge 14 and can be of a slope structure at two sides, namely an eight-shaped structure or a parallel structure, the width (or thickness) of the bridge piers is slightly larger than that (or thickness) of the shunt bridge 14, the structural strength of the shunt bridge 14 can be improved, larger extrusion resistance and extrusion torque can be borne, the bridge piers and the bridge body of the shunt bridge 14 are designed to be in arc transition, the contact area of the bridge piers and extruded metal is increased, metal dispersed on the unit area of the inner surface of the shunt bridge 14 is reduced, metal flowing is facilitated, the extrusion resistance is reduced, and the problem that the shunt bridge 14 is broken is effectively solved.

Mold cores 16-1, 16-2

Referring to fig. 2, 3 and 5, a step 18 as shown in fig. 3 can be arranged on the end surface of the mold core 16, and the end surface of the step 18 is smaller than the end surface of the mold core 16, so that the extrusion force can be reduced, the profile can be conveniently extruded, the flow of molten metal is facilitated, and the quality of an extruded product is improved.

Referring to fig. 2, 3 and 6, a first welding chamber 19-1, a second welding chamber 19-2, a first die hole 17-1 and a second die hole 17-2 are provided on the lower die 11, the first welding chamber 19-1 and the second welding chamber 19-2 are respectively matched with the first feeding cavity 13-1 and the second feeding cavity 13-2, the first die hole 17-1 and the second die hole 17-2 are respectively matched with the first die core 16-1 and the second die core 16-2 with different shapes, the first die core 16-1 and the second die core 16-2 are accommodated in the first die hole and the second die hole, and a first die cavity 21 and a second die cavity 22 with different shapes are formed.

Referring to fig. 2 and 3, the shapes and sizes of the mold cores, the mold holes and the mold cavities are matched with each other according to the shapes and sizes of the profiles, the two mold cores, the two mold holes and the two mold cavities can be arranged in the same direction, the profiles are extruded in the mold cavities, and the extruded two profiles are consistent in orientation.

Weld chambers 19-1, 19-2

Referring to fig. 2 and 3, the shapes of the welding chambers 19-1 and 19-2 are matched with the feeding cavity and the shunt 5, the outer edges of the welding chambers are designed into petal shapes along the outer edges of the two shunt holes through arc transition, no structural dead zone exists, the influence of metal on the flowability of the metal caused by the metal staying in the dead zone is avoided, and the quality of a welding seam is improved. The petals of the welding chamber 19 close to the center of the upper die 10 are small, and the petals far away from the center of the upper die 10 are large, so that the flow rate of liquid passing through the welding chamber 19 is balanced, and the pressure is uniform.

Referring to fig. 3, the welding chamber 19 may be provided in two layers with successively increasing depths, in the case of the profile structure shown in fig. 1, the depth of the first layer is 10mm, and the depth of the second layer is 13 mm.

Working belt 22, blank 23

Referring to fig. 3, the lower die 11 is further provided with a working band 22 and a blank cutter 23, and a cooling device may be disposed at the working band 22 of the lower die 11 to reduce the temperature variation of the die and the thermal fatigue problem of the material. The blank cutter 23 may be divided into two stages.

Die pad 12

Referring to fig. 3, after the die pad 12 is stacked on the lower die 11, two discharging cavities slightly larger than the two die holes corresponding to the two die holes are penetratingly disposed in the die pad 12.

Based on the arrangement, taking aluminum alloy as an example, two pieces of aluminum alloy material are put into the section extrusion die, and simultaneously extruding two different sectional materials, extruding the heated aluminum alloy material by a pressure device to generate plastic deformation, pushing the deformed plastic aluminum alloy material forwards by the pressure device, enters each shunting hole through two feed inlets on the feed surface of the upper die 10, enters welding chambers 19-1 and 19-2 of the lower die 11, the separated plastic aluminum alloy materials passing through the shunting holes 15 in the welding chambers 19-1 and 19-2 are re-fused, and then are molded in a cavity formed by the mold core and the mold holes, because the mold core, the mold hole and the mold cavity are provided with two different mold cavities according to the shape and the size of the section, thus, two different profiles, once extruded, are finally discharged through the discharge chamber in the die pad 12. From this, contrast haplopore extrusion die, production efficiency improves greatly, and extrudees once and has operated the machine and produced two branch section bars simultaneously, has saved manual work and cost greatly.

It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.

Claims

1. A section extrusion die comprises an upper die, a lower die and a die pad, and is characterized in that,

a first feeding cavity and a second feeding cavity are arranged on the feeding surface of the upper die, a shunting bridge is arranged in each of the first feeding cavity and the second feeding cavity, each feeding cavity forms two shunting holes through the shunting bridge, and a first die core and a second die core extend from one side of the upper die facing the lower die;

2. A profile extrusion die according to claim 1 wherein said feed cavity is a polygonal cavity with a circular transition, and a portion of said feed cavity near said upper die periphery extends from said upper die feed surface in a direction from said upper die feed surface to said upper die discharge surface in an expanding manner towards said upper die periphery, so that the flow rate of liquid through said feed cavity is balanced and the pressure is uniform.

3. The profile extrusion die of claim 1,

the shunting hole is a polygonal cavity with arc transition.

4. The profile extrusion die of claim 1,

the welding chamber is in a petal shape with arc transition.

5. The profile extrusion die of claim 1,

the shunting bridge is sunken compared with the shunting hole bridge, and the cross section of the shunting bridge is in a water drop shape.

6. The profile extrusion die of claim 1,

two parts of the shunting bridge are provided with piers which are of two-side slope structures or parallel structures, and the piers and the shunting bridge are in circular arc transition.

7. The profile extrusion die of claim 1,

the end face of the mold core is provided with a step.

8. The profile extrusion die of claim 1,

the welding chamber is divided into two layers, and the depth is gradually increased.

9. The profile extrusion die of claim 1,

the lower die is provided with a working belt and an empty cutter, the working belt is provided with a cooling device, and the empty cutter is divided into two stages.

10. The profile extrusion die of claim 1,

the first feeding cavity and the second feeding cavity are the same in shape and size.