Lug structure for solving edge cracking problem of cast-rolled blank

Abstract

The utility model relates to the technical field of aluminum alloy cast rolling, in particular to a lug structure for solving the problem of edge cracking of cast rolling blanks, which comprises a casting mouth lug, mouth sashes, a triangular block and crosspiece strips, the two mouth sashes are connected between the casting mouth lug, the two crosspiece strips are connected between the two mouth sashes, an aluminum inlet is formed at one ends, close to each other, of the two crosspiece strips, and an aluminum outlet is formed at the other end of each crosspiece strip. The aluminum alloy casting nozzle is reasonable in structural design, aluminum alloy melts are evenly distributed in the casting nozzle cavity, the distribution effect of the aluminum alloy melts is good, when the aluminum alloy melts are distributed to the edge portion, the aluminum alloy melts are evenly distributed in the casting nozzle cavity, and therefore the aluminum alloy melts can be evenly distributed in the casting nozzle cavity. The aluminum alloy melt can flow out along the chute formed between the inclined plane I and the two asbestos blocks, so that the friction between the aluminum alloy melt and the casting mouth lug is reduced, the formation of cracks at the edge of a cast-rolled blank is prevented, the cold rolling yield is effectively improved, and the casting mouth lug is suitable for popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aluminium alloy cast rolling, in particular to an ear structure for solving the problem of edge cracking of cast rolling blank. BACKGROUND

[0002] In the production process of aluminium alloy cast rolling strip, in order to improve the subsequent cold rolling yield, the edge cracking of the cast rolling strip blank is required to be as small as possible or even edgeless. However, in the actual production process, due to the influence of internal stress of the cast rolling strip, the ear of the casting nozzle and the pressure of the front box, the edge cracking is large in the production of high alloys such as 3102 and 8011, which is not conducive to the improvement of the subsequent cold rolling yield. SUMMARY

[0003] The utility model discloses an ear structure for solving the problem of edge cracking of cast rolling blank, which reduces the friction between the aluminium alloy melt and the ear of the casting nozzle and effectively prevents the formation of edge cracks of the cast rolling blank.

[0004] To achieve the above technical effects, the ear structure for solving the problem of edge cracking of cast rolling blank includes two casting nozzle ears, two nozzle fans, two triangular blocks and two crosspieces. The two casting nozzle ears are parallel and symmetrical. The two nozzle fans are parallel and symmetrical. The two nozzle fans are connected between the two casting nozzle ears. The two crosspieces are connected between the two nozzle fans. The two crosspieces are arranged on the inner walls of the upper ends of the nozzle fans. The ends of the two crosspieces away from each other are connected to the side walls of the two casting nozzle ears, respectively. The ends of the two crosspieces close to each other form an aluminium inlet. The inner walls of the lower ends of the two nozzle fans form an aluminium outlet. The casting nozzle cavity is formed between the two casting nozzle ears, the two nozzle fans and the two crosspieces. The two triangular blocks are symmetrical. The triangular blocks are in the shape of right-angled triangles. The two right-angled sides of one triangular block are connected to the inner walls of one casting nozzle ear and one crosspiece, respectively.

[0005] Further, the casting nozzle ear includes an ear body and an ear waist. The ear waist is arranged at the lower end of the ear body. The cross section of the ear body is in the shape of a rectangle. Symmetrical arcs are arranged on the two symmetrical side walls of the ear waist. The lower ends of the arcs on the two symmetrical side walls of the ear waist are close to each other. The nozzle fan includes a fan body and a fan waist. The fan waist is arranged at the lower end of the fan body. The cross section of the fan body is in the shape of a rectangle. The fan waist is in the shape of an arc. The size of the arc of the fan waist is consistent with that of the arc of the ear waist. The fan waist is connected to the ear body. The fan waist is connected to the ear waist.

[0006] Further, the bottom surface of the ear waist is provided with an inclined surface I. The height of the end of the inclined surface I close to the casting nozzle cavity is greater than the height of the end of the inclined surface I close to the outer wall of the casting nozzle ear. A round corner is arranged between the inclined surface I and the ear waist. The inclined surfaces I of the two casting nozzle ears are symmetrical to each other.

[0007] Further, the two arc-shaped side walls of each ear waist are connected with asbestos blocks, the asbestos blocks are symmetrical, the asbestos blocks have the same arc shape as the ear waist, the bottom surface of the asbestos block is provided with an inclined surface II, the inclined surface II has the same angle as the inclined surface I, a round corner is arranged between the inclined surface II and the inner side wall of the asbestos block, the inclined surface II extends out of the inclined surface I, and each inclined surface I and the two asbestos blocks form a chute.

[0008] Further, the inner wall of each nozzle ear is attached with asbestos felt, the asbestos felt covers the ear body, the ear waist and the round corner between the inclined surface I and the ear waist, the side wall of the nozzle fan is closely attached with the asbestos felt, and the triangular block is closely attached with the asbestos felt.

[0009] The aluminum alloy melt is evenly divided in the nozzle cavity, the division effect of the aluminum alloy melt is good, when the aluminum alloy melt is divided to the edge part, can flow out along the chute formed between the inclined surface I and the two asbestos blocks, so as to reduce the friction between the aluminum alloy melt and the nozzle ear, and prevent the formation of cracks in the edge part of the cast rolling blank, the cold rolling yield is effectively improved, and the aluminum alloy melt is suitable for promotion. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structural schematic view of the utility model;

[0011] Figure 2 It is the A-A sectional view of the utility model; Figure 1

[0012] Figure 3 It is the B-B sectional view of the utility model; Figure 2

[0013] Figure 4 It is the side view of the utility model;

[0014] Figure 5 It is the structural schematic view of the nozzle ear of the utility model;

[0015] Figure 6 It is the C-C sectional view of the utility model; Figure 5

[0016] Figure 7 It is the structural schematic view of the asbestos block of the utility model.

[0017] In the drawing: 1. Nozzle ear; 101. Ear body; 102. Ear waist; 103. Inclined surface I; 2. Nozzle fan; 201. Fan body; 202. Fan waist; 3. Triangular block; 4. Crossbar; 5. Aluminum inlet; 6. Aluminum outlet; 7. Asbestos felt; 8. Asbestos block; 801. Inclined surface II. DETAILED DESCRIPTION

[0018] As Figures 1-7 ​​​The utility model discloses an ear structure for solving the edge crack problem of casting and rolling blank, which comprises two casting nozzle ears, two nozzle fans, two triangular blocks and two crosspieces.

[0019] The casting nozzle ear comprises an ear body 101 and an ear waist 102. The ear waist 102 is arranged at the lower end of the ear body 101. The cross-sectional shape of the ear body 101 is rectangular. Symmetrical arcs are arranged on the two symmetrical side walls of the ear waist 102. The lower ends of the arcs on the two symmetrical side walls of the ear waist 102 are close to each other. The nozzle fan 2 comprises a fan body 201 and a fan waist 202. The fan waist 202 is arranged at the lower end of the fan body 201. The cross-sectional shape of the fan body 201 is rectangular. The fan waist 202 is arc-shaped. The size of the arc of the fan waist 202 is consistent with that of the arc of the ear waist 102. The fan waist 202 is connected to the ear body 101. The fan waist 202 is connected to the ear waist 102.

[0020] The bottom surface of the ear waist 102 is provided with an inclined surface I 103. The height of the end of the inclined surface I 103 close to the casting nozzle cavity is greater than the height of the end of the inclined surface I 103 close to the outer wall of the casting nozzle ear 1. A round corner is arranged between the inclined surface I 103 and the ear waist 102. The inclined surfaces I 103 of the two casting nozzle ears 1 are symmetrical to each other.

[0021] The two arc-shaped side walls of each ear waist 102 are connected with an asbestos block 8. The asbestos blocks 8 are symmetrical. The asbestos blocks 8 have the same arc shape as the ear waist 102. The bottom surface of the asbestos block 8 is provided with an inclined surface II 801. The angle of the inclined surface II 801 is the same as that of the inclined surface I 103. A round corner is arranged between the inclined surface II 801 and the inner side wall of the asbestos block 8. The inclined surface II 801 extends out of the inclined surface I 103. A chute is formed between each inclined surface I 103 and the two asbestos blocks 8.

[0022] The inner wall of each casting nozzle ear 1 is attached with an asbestos felt 7. The asbestos felt 7 covers the ear body 101, the ear waist 102, the round corner between the inclined surface I 103 and the ear waist 102, the side wall of the nozzle fan 2 and the asbestos felt 7, and the triangular block 3 and the asbestos felt 7.

[0023] The inlet 5 is connected with the front box, and is used for the aluminum alloy melt to enter the die cavity between the die lug 1, the two die fans 2 and the two crosspieces 4. The aluminum alloy melt is evenly discharged from the outlet 6 into the casting roller after being divided by the internal structure of the die. The triangular block 3 is arranged for the division of the aluminum alloy melt at the middle edge of the die. The asbestos felt 7 is arranged to prevent the aluminum alloy melt from leaking from the joint between the die fan 2 and the die lug 1.

[0024] The chute formed between each inclined surface 103 and the two asbestos blocks 8 is used for the aluminum alloy melt to flow out along the chute when the aluminum alloy melt is divided to the edge, so as to reduce the friction between the aluminum alloy melt and the die lug 1, and further prevent the formation of the edge crack of the casting and rolling blank.

Claims

1. An ear structure to solve the problem of edge cracking of a cast-rolled blank, characterized in that: The application relates to a casting nozzle, which comprises two nozzle ears (1), two nozzle fans (2), two triangular blocks (3) and two crosspieces (4), the two nozzle ears (1) are parallel and symmetrical, the two nozzle fans (2) are parallel and symmetrical, the two nozzle fans (2) are connected between the two nozzle ears (1), the two crosspieces (4) are connected between the two nozzle fans (2), the two crosspieces (4) are arranged on the inner walls of the upper ends of the two nozzle fans (2), the two crosspieces (4) are connected to the side walls of the two nozzle ears (1) at the ends away from each other, the two crosspieces (4) are connected to each other at the ends close to each other to form an aluminum inlet (5), the inner walls of the lower ends of the two nozzle fans (2) form an aluminum outlet (6), the two nozzle ears (1), the two nozzle fans (2) and the two crosspieces (4) form a nozzle cavity, the two triangular blocks (3) are symmetrical, the triangular blocks (3) are in the shape of right-angled triangles, the two right-angled sides of one triangular block (3) are connected to the inner wall of one nozzle ear (1) and the inner wall of one crosspiece (4) respectively, the nozzle ear (1) comprises an ear body (101) and an ear waist (102), the ear waist (102) is arranged at the lower end of the ear body (101), the cross section of the ear body (101) is in the shape of a rectangle, the two symmetrical side walls of the ear waist (102) are provided with symmetrical arcs, the lower ends of the arcs on the two symmetrical side walls of the ear waist (102) are close to each other, the nozzle fan (2) comprises a fan body (201) and a fan waist (202), the fan waist (202) is arranged at the lower end of the fan body (201), the cross section of the fan body (201) is in the shape of a rectangle, the fan waist (202) is in the shape of an arc, the arc of the fan waist (202) is the same in size as the arc of the ear waist (102), the fan waist (202) is connected to the ear body (101) and the ear waist (102), the bottom surface of the ear waist (102) is provided with an inclined surface I (103), the height of the end of the inclined surface I (103) close to the nozzle cavity is greater than the height of the end of the inclined surface I (103) close to the outer wall of the nozzle ear (1), a round corner is arranged between the inclined surface I (103) and the ear waist (102), the inclined surface I (103) of the two nozzle ears (1) is symmetrical, each ear waist (102) is provided with an asbestos block (8), the asbestos blocks (8) are symmetrical, the asbestos blocks (8) have the same arc as the ear waist (102), the bottom surface of the asbestos block (8) is provided with an inclined surface II (801), the angle of the inclined surface II (801) is the same as that of the inclined surface I (103), a round corner is arranged between the inclined surface II (801) and the inner side wall of the asbestos block (8), the inclined surface II (801) extends out of the inclined surface I (103), each inclined surface I (103) and the two asbestos blocks (8) form a chute.

2. The lug structure for solving the problem of the edge crack of the cast-rolling blank according to claim 1, characterized in that: The inner wall of each nozzle ear (1) is attached with an asbestos felt (7), the asbestos felt (7) covers the ear body (101), the ear waist (102), the round corner between the inclined surface I (103) and the ear waist (102), the side wall of the nozzle fan (2) is tightly attached with the asbestos felt (7), and the triangular block (3) is tightly attached with the asbestos felt (7).

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