CN219483799U

CN219483799U - Hot extrusion die

Info

Publication number: CN219483799U
Application number: CN202320268104.5U
Authority: CN
Inventors: 韩志君; 王伟
Original assignee: Foshan Sanshui Fenglu Aluminium Co Ltd; Guangdong Fenglu Aluminium Co Ltd
Current assignee: Foshan Sanshui Fenglu Aluminium Co Ltd; Guangdong Fenglu Aluminium Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-08-08
Anticipated expiration: 2033-02-20

Abstract

The utility model provides a hot extrusion die, which comprises an upper die and a lower die connected with the upper die; the upper die is provided with a diversion hole and a working belt matched with the outer contour of the extrusion plate, the diversion hole is positioned at the feeding end and is arranged along the outer contour of the working belt, and the diversion hole is communicated with the working belt; the lower die is provided with a discharging channel penetrating through two end surfaces of the lower die, and the discharging end is connected with the lower die. The utility model solves the problems of broken corners, difficult molding and dimensional deviation of the extrusion plate in the production process.

Description

Hot extrusion die

Technical Field

The utility model relates to the field of extrusion dies, in particular to a hot extrusion die.

Background

Hot extrusion is extrusion by heating a metal material to a hot forging forming temperature, that is, extrusion by heating a billet to a temperature equal to or higher than the recrystallization temperature of the metal before extrusion. Along with the wider and wider application of extruded aluminum profiles, the structural design of the aluminum profiles is also more and more complex, the flow, the speed and the resistance of the material flow through the blade cavity are smaller than those of the material flow through the central hollow part in the process of producing the radiator profiles, the extrusion die in the prior art cannot effectively control the flow and the speed of the material flow through the blade cavity and also cannot effectively reduce the resistance of the material flow through the blade cavity, the forming of the radiator profiles cannot be effectively controlled, the produced radiator profiles are poor in appearance quality, low in surface smoothness and high in energy consumption, and especially the high-power tooth radiator profiles are extremely difficult to produce due to the strength problem. The 1060 alloy extrusion plate is widely applied to industries such as doors and windows, automobile weight reduction, rail transit, ships, electric power, aerospace and the like due to the characteristics of excellent specific strength, corrosion resistance, thermal conductivity, electric conductivity, formability and the like, so that the 1060 alloy plate is obtained through extrusion molding through industry research and development, the production effect of the high-power tooth radiator is better through a tooth forming device, but the 1060 alloy extrusion plate also has the problems of corner dragging, difficult molding, dimensional deviation and the like in the production process of the 1060 alloy extrusion plate, and the extrusion production and the product delivery are affected.

Disclosure of Invention

Based on the problems of corner dragging, difficult forming and dimensional deviation in the production process of the extrusion plate, the utility model provides a hot extrusion die, which has the following specific technical scheme:

a hot extrusion die comprising:

an upper die and a lower die connected with the upper die;

an end face, far away from the lower die, of the upper die is a feeding end, an end face, close to the lower die, of the upper die is a discharging end, the discharging end is connected with the lower die, the upper die is provided with a diversion hole and a working belt matched with the outer contour of the extrusion plate, the diversion hole is positioned at the feeding end, the diversion hole is arranged along the outer contour of the working belt, and the diversion hole is communicated with the working belt;

the lower die is provided with a discharging channel penetrating through two end faces of the lower die, and the discharging end is connected with the lower die.

According to the hot extrusion die, the feeding balance of each part of the working belt is realized by arranging the guide holes along the outer contour of the working belt on the upper die, so that the phenomenon that the forming speed of the extrusion plate is inconsistent due to large difference of the flow speeds of material flows is prevented; by optimizing the layout of the diversion holes, the problems of difficult molding and deviation of the size in the extrusion production process are solved; the working belt is also arranged for forming the extrusion plate; the discharge channel is arranged for pulling out the extrusion plate, so that the extrusion plate is prevented from being dragged by collision with the die.

Further, a first hollow cutter cavity and a second hollow cutter cavity are further arranged in the upper die, the guide holes, the working belt, the first hollow cutter cavity and the second hollow cutter cavity are sequentially communicated in the direction from the feeding end to the discharging end, and the second hollow cutter cavity is communicated with the discharging channel.

Further, the outer contour of the deflector hole comprises a first arc segment, a first straight line segment, a second arc segment and a second straight line segment, and the first arc segment, the first straight line segment, the second arc segment and the second straight line segment are sequentially connected end to end.

Further, the first straight line segment and the second straight line segment are arranged at intervals in parallel.

Further, the diversion hole with be equipped with protruding curved surface, inclined plane and the straight face of the one end that the working tape is connected, protruding curved surface the inclined plane and the straight face is by the feed end extremely the discharge end connects gradually, the straight face with the working tape is connected.

Further, the inclined plane forms an included angle with the flat plane, and the included angle is 6-10 degrees.

Further, the cross-sectional area of the inclined surface gradually decreases from the feed end to the discharge end.

Further, corners in the outer profile of the working belt are provided with rounded corners.

Further, the upper die is provided with a protruding portion, the lower die is provided with a groove, and the protruding portion is in butt joint with the groove.

Further, the hot extrusion die further comprises a fixing piece, and the lower die is connected with the upper die through the fixing piece.

Drawings

The utility model will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

FIG. 1 is a schematic view of a hot extrusion die according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of the structure at A-A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the structure at B-B in FIG. 2;

fig. 4 is an enlarged view at C in fig. 2;

FIG. 5 is a second schematic view of a hot extrusion die according to an embodiment of the utility model;

reference numerals illustrate:

1. an upper die; 11. a feed end; 12. a discharge end; 13. a deflector aperture; 131. a first arc segment; 132. a first straight line segment; 133. a second arc segment; 134. a second straight line segment; 135. a convex curved surface; 136. an inclined plane; 137. a flat surface; 14. a working belt; 15. a first hollow cutter cavity; 16. a second hollow cutter cavity; 17. a boss; 2. a lower die; 21. a discharge channel; 22. a groove; 3. a fixing member; 4. and a positioning piece.

Detailed Description

The present utility model will be described in further detail with reference to the following examples thereof in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "fixed 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The terms "first" and "second" in this specification do not denote a particular quantity or order, but rather are used for distinguishing between similar or identical items.

As shown in fig. 1 to 5, a hot extrusion die according to an embodiment of the present utility model includes an upper die 1 and a lower die 2 connected to the upper die 1; one end surface of the upper die 1, which is far away from the lower die 2, is a feeding end 11, one end surface of the upper die 1, which is close to the lower die 2, is a discharging end 12, the discharging end 12 is connected with the lower die 2, the upper die 1 is provided with a diversion hole 13 and a working belt 14 matched with the outer contour of the extrusion plate, the diversion hole 13 is positioned at the feeding end 11, the outer contour of the diversion hole 13 is arranged along the outer contour of the working belt 14, and the diversion hole 13 is communicated with the working belt 14; the lower die 2 is provided with a discharge passage 21 penetrating through both end surfaces of the lower die 2, and the discharge end 12 is connected with the lower die 2.

The hot extrusion die realizes the balance of feeding of all parts of the working belt 14 by arranging the material guide holes along the outer contour of the working belt 14 on the upper die 1, and prevents the large difference of the flow speeds of the material flows from causing inconsistent forming speeds of the extrusion plates; by optimizing the layout of the diversion holes, the problems of difficult molding and deviation of the size in the extrusion production process are solved; a working belt 14 is provided for shaping the extrusion plate; the extrusion plate is also provided with a discharge channel for pulling out the extrusion plate, so that the extrusion plate is prevented from being dragged by collision between the extrusion plate and the die.

Preferably, the cross-sectional area of the discharge channel is larger than the cross-sectional area of the second hollow space.

Preferably, the outer contours of the upper die 1 and the lower die 2 are both cylindrical.

Specifically, the upper die 1 is further internally provided with a first hollow cutter cavity 15 and a second hollow cutter cavity 16, the diversion hole 13, the working belt 14, the first hollow cutter cavity 15 and the second hollow cutter cavity 16 are sequentially communicated along the direction from the feeding end 11 to the discharging end 12, and the second hollow cutter cavity 16 is communicated with the discharging channel 21. The direction from the feeding end 11 to the discharging end 12 is the advancing direction of the material flow; the material flows pass through the diversion holes 13 and then are extruded by the working belt 14 to form an extrusion plate, the extrusion plate passes through the first hollow cutter cavity 15 and the second hollow cutter cavity 16, the outer contour of the first hollow cutter cavity 15 and the outer contour of the second hollow cutter cavity 16 are matched with the outer contour of the extrusion plate, the first hollow cutter cavity 15 and the second hollow cutter cavity 16 enable the extrusion plate to safely pass through the upper die 1, and no severe scraping or acting force is generated between the extrusion plate and the die, so that the effect of prolonging the service life of the die is achieved, and the quality of the extrusion plate is guaranteed.

Preferably, the cross section of the working belt 14 is kept uniform in the feed direction of the stream, and the cross section of the working belt 14 is the same shape and size as the cross section of the extrusion plate to be formed.

Preferably, the first cavity 15 and the second cavity 16 are formed in a stepped shape, and the cross-sectional area of the first cavity 15 and the cross-sectional area of the second cavity 16 are gradually increased from the feeding end 11 to the discharging end 12, so that the extrusion plate can be better supported.

Specifically, the outer contour of the flow guiding hole 13 includes a first arc segment 131, a first straight segment 132, a second arc segment 133, and a second straight segment 134, and the first arc segment 131, the first straight segment 132, the second arc segment 133, and the second straight segment 134 are connected end to end in sequence. The first arc segment 131, the first straight line segment 132, the second arc segment 133 and the second straight line segment 134 form a space after being connected end to end in sequence, and the space surrounds the outer contour of the working belt 14, so that the material flow sufficiently and uniformly enters the working belt 14, and the dimensional stability of the extruding plate is further improved.

Specifically, the first straight line segment 132 and the second straight line segment 134 are disposed in parallel and spaced apart.

Preferably, the length of the first straight line segment 132 is equal to the length of the second straight line segment 134, the first arc segment and the second arc segment are symmetrically arranged along the central axis of the upper die 1, and the first straight line segment 132 and the second straight line segment 134 are symmetrically arranged along the central axis of the upper die 1 to enclose the working belt 14 therebetween, so that the material flow is conveniently and uniformly guided to the working belt 14.

As shown in fig. 3 and 4, in one embodiment, the end of the diversion hole 13 connected to the working belt 14 is provided with a convex curved surface 135, an inclined surface 136 and a flat surface 137, and the convex curved surface 135, the inclined surface 136 and the flat surface 137 are sequentially connected from the feeding end 11 to the discharging end 12, and the flat surface 137 is connected to the working belt 14. Before the material flow enters the working belt 14 from the feeding end 11, the material flow passes through the convex curved surface 135, then passes through the inclined surface 136, then passes through the flat surface 137, and finally enters the working belt 14, when the material flow enters the working belt 14, the shearing deformation stress of the surface layer of the extrusion plate after extrusion molding can be effectively reduced due to the action of the convex curved surface 135, and then the growth of crystal grains of the surface layer of the extrusion plate is blocked, so that the crystal grains of the extrusion plate after extrusion molding are uniform and consistent, and the difference of the size of the extrusion plate is effectively reduced.

Specifically, the inclined surface 136 forms an angle D with the flat surface 137, and the angle D is 6-10 degrees. Therefore, the degree of shear deformation of the surface layer of the extrusion plate can be effectively improved, and deviation of the size of the extrusion plate is avoided.

Specifically, the cross-sectional area of the chamfer 136 gradually decreases from the feed end 11 to the discharge end 12. The inclined surface 136 and the convex curved surface 135 play a role in buffering, so that the direct impact force of the material flow on the upper die 1 is reduced, and the service life of the die is prolonged.

Specifically, corners in the outer profile of work belt 14 are rounded. Namely, the right angles formed by the straight edges in the outer contour of the working belt 14 are rounded, so that corners are prevented from being pulled out when the extrusion plate is pulled out after being molded, and meanwhile, the working belt 14 is convenient to process.

Preferably, the radius of the fillet is 0.5.

Specifically, the straight edges in the working belt 14 in the direction perpendicular to the first straight line segment 132 are all inclined at an angle of 1 ° to 3 °, so that the extrusion plate after molding is easily pulled out, and the manufacturing of the die is facilitated.

As shown in fig. 2 and 3, in one of the embodiments, the discharge end 12 is provided with a protrusion 17, the lower die 2 is provided with a groove 22, and the protrusion 17 abuts against the groove 22. When the upper die 1 is connected with the lower die 2, the convex portion 17 provides a positioning function for the upper die 1.

Wherein the boss 17 is not limited to a cylinder and a rectangular parallelepiped, and the outer contour of the groove 22 matches the outer contour of the boss 17. The compression surface of the upper die 1 is large, the upper die 1 can be subjected to great forward pressure in the extrusion process, when the strength of the upper die 1 is lower than the pressure, the elastic deformation of the upper die 1 can occur, so that the bulge 17 is abutted with the groove 22 to effectively prevent the elastic deformation of the upper die 1 to the outside, the deformation of the hot extrusion die is reduced, and the dimensional stability of the extrusion plate is further enhanced.

As shown in fig. 2, in one embodiment, the hot extrusion die further includes a fixing member 3 and a positioning member 4, and the upper die 1 and the lower die 2 are connected by the fixing member 3. Before extrusion, after the upper die 1 and the lower die 2 are buckled through the fixing and positioning piece 4, the upper die 1 and the lower die 2 are fixedly connected through the fixing piece 3, so that the upper die 1 and the lower die 2 are prevented from shifting in the extrusion process.

Preferably, the positioning member 4 is a positioning pin, and the fixing member 3 is a screw.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. The utility model provides a hot extrusion die, includes the mould and with go up the lower mould that the mould is connected, its characterized in that:

an end face, far away from the lower die, of the upper die is a feeding end, an end face, close to the lower die, of the upper die is a discharging end, the discharging end is connected with the lower die, the upper die is provided with a guide hole and a working belt matched with the outer contour of the extrusion plate, the guide hole is positioned at the feeding end, the outer contour of the guide hole is arranged along the outer contour of the working belt, and the guide hole is communicated with the working belt;

2. The hot extrusion die of claim 1, wherein a first cavity and a second cavity are further provided in the upper die, the deflector hole, the working belt, the first cavity and the second cavity are sequentially communicated in a direction from a feed end to a discharge end, and the second cavity is communicated with the discharge channel.

3. The hot extrusion die of claim 2, wherein the outer profile of the deflector aperture comprises a first arc segment, a first straight line segment, a second arc segment, and a second straight line segment, the first arc segment, the first straight line segment, the second arc segment, and the second straight line segment being connected end to end in sequence.

4. A hot extrusion die as claimed in claim 3 wherein the first straight line segment is spaced parallel to the second straight line segment.

5. A hot extrusion die according to claim 3, wherein one end of the deflector hole connected to the working belt is provided with a convex curved surface, an inclined surface and a flat surface, the convex curved surface, the inclined surface and the flat surface being sequentially connected from the feed end to the discharge end, and the flat surface being connected to the working belt.

6. The hot extrusion die of claim 5 wherein the inclined surface forms an angle with the flat surface, the angle being between 6 ° and 10 °.

7. The hot extrusion die of claim 6 wherein the cross-sectional area of the chamfer tapers from the feed end to the discharge end.

8. The hot extrusion die of claim 7 wherein corners in the outer profile of the working belt are each rounded.

9. The hot extrusion die of claim 1, wherein the upper die is provided with a boss and the lower die is provided with a groove, the boss abutting the groove.

10. The hot extrusion die of claim 1, further comprising a fixture by which the lower die is connected to the upper die.