Segmented casting and pouring system for large ore grinding gear ring

Abstract

The utility model belongs to the technical field of casting and pouring systems, and particularly discloses a segmented casting and pouring system for a large ore grinding gear ring, which comprises a vertical pouring gate, a cross pouring gate, a transverse pouring gate, a straight pouring gate, a separation sand core and a casting cavity, the outer end of the cross-shaped pouring gate is connected with the middle part of the cross pouring gate; the casting cavity is located above the cross gate, and the lower end face of the casting cavity is communicated with the cross gate through the sprue; four casting cavities form a group, separation sand cores are arranged among the casting cavities, and a riser is arranged on the upper end surface of each casting cavity; according to the casting system, the whole circle casting of the casting is changed into split casting, so that the shrinkage stress in the casting cooling process is reduced, and the probability of distortion deformation is reduced; according to the pouring system, lacing wire arrangement is omitted, lacing wire welding in the later period is replaced, molten steel loss in the pouring process is reduced, the product yield is increased, and the production cost of castings is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of foundry pouring system, and particularly relates to a segmented foundry pouring system for large mine grinding gear ring. BACKGROUND

[0002] In the prior art, when pouring a large-diameter annular cast steel piece, a whole pouring method is generally used for casting; however, when processing a mine grinding gear ring, the diameter of the mine grinding gear ring is large, and the wall thickness is thin; after pouring is completed, the cast piece is prone to uneven shrinkage stress in the process of cooling and shrinking, and the cast piece as a whole is likely to be twisted and deformed, so that the flatness of the cast piece is out of tolerance, and the cast piece is prone to be scrapped;

[0003] In order to prevent the cast piece from being twisted and deformed, a reinforcing rib is usually added at the position of the opening of the circular ring; the reinforcing rib is removed after the cast piece is poured, heat treated, and stable in performance; this process method can effectively prevent the cast piece from being deformed and improve the product quality; however, since the diameter of the cast piece is large, the reinforcing rib required is also relatively long, so that the reinforcing rib is heavy, the product yield is reduced, and the production cost is increased. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems in the background art, the utility model provides a segmented foundry pouring system for a large mine grinding gear ring; the pouring system changes the whole-circle pouring of the cast piece into four-segment pouring, and cancels the cast reinforcing rib and changes the method of welding the reinforcing rib in the later period; although the subsequent workload is increased, the molten steel loss during pouring is effectively reduced, the product yield is improved, and the production cost is reduced.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a segmented foundry pouring system for a large mine grinding gear ring, comprising a vertical gate, a cross gate, a horizontal gate, a straight gate, a partition sand core, and a cast piece cavity; the lower end of the vertical gate is connected to the center of the cross gate, and the outer end of the cross gate is connected to the middle part of the horizontal gate; the cast piece cavity is located above the horizontal gate, and the lower end surface of the cast piece cavity is connected to the horizontal gate through the straight gate; the four cast piece cavities are a group, and the partition sand core is arranged between the cast piece cavities; the upper end surface of each cast piece cavity is provided with a riser.

[0006] The arc angle of the cast piece cavity is 90°.

[0007] The partition sand core comprises a ring-shaped sand core and partition blocks; the partition blocks are uniformly distributed on the outer wall of the ring-shaped sand core, the spacing between adjacent partition blocks is equal to the spacing between the two side walls of the cast piece cavity, and the outer diameter of the ring-shaped sand core is matched with the inner diameter of the cast piece cavity.

[0008] The diameters of the cross gate and the horizontal gate are a, and the diameter of the straight gate is b; a:b = 3:2.

[0009] The beneficial effects of this utility model are as follows: This utility model provides a segmented casting and gating system for large mining mill gear rings. This gating system changes the whole-circle casting of the casting to four-segment segmented casting, thereby reducing the shrinkage stress on the casting during the cooling process and reducing the probability of the casting tortuous deformation. This gating system eliminates the tie rod setting and replaces it with a method of welding tie rods later, which reduces the steel loss during casting, improves the product yield, and effectively reduces the production cost of castings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of the present invention.

[0012] Figure 3 This is a top view showing the separation of the sand core.

[0013] In the diagram: 1. Vertical runner, 2. Cross runner, 3. Horizontal runner, 4. Straight runner, 5. Separating sand core, 51. Annular sand core, 52. Separating block, 6. Casting cavity, 7. Riser. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] The utility model discloses a sectional casting pouring system for large mine gear ring, including sprue 1, cross gate 2, horizontal gate 3, straight runner 4, separate sand core 5 and casting cavity 6, the upper end of sprue 1 is linked together with the pouring basin, and the lower end of sprue 1 is linked together with the center of cross gate 2, and the outer end of cross gate 2 is linked together with the middle part of horizontal gate 3, the casting cavity 6 is located above horizontal gate 3, and the lower end surface of casting cavity 6 is linked together with horizontal gate 3 through straight runner 4, the diameter of cross gate 2 and horizontal gate 3 is a, and the diameter of straight runner 4 is b, a:b=3:2, in order to improve casting quality, the diameter of straight runner 4 should be less than the width of casting cavity 6, and less than the diameter of cross gate 2 and horizontal gate 3, can ensure that straight runner 4 cools first in the process of casting cooling, thereby reducing the shrinkage of straight runner 4 and casting cavity 6 intersection place due to insufficient molten steel feeding, the four of casting cavity 6 are a group, and the arc angle of casting cavity 6 is 90 DEG, the arc angle of each casting cavity 6 is 90 DEG, and four casting cavities 6 can form a circular ring, in the embodiment, after casting pouring is completed, each group of castings is welded together through electric welding, and a complete mine gear ring is formed, the separate sand core 5 is arranged between casting cavity 6, and the riser 7 is arranged on the upper end surface of each casting cavity 6, the separate sand core 5 includes annular sand core 51 and separate block 52, the separate block 52 is evenly distributed on the outer wall of annular sand core 51, the interval between adjacent separate blocks 52 is equal to the interval of the two side walls of casting cavity 6, and the outer diameter of annular sand core 51 is adapted to the inner diameter of casting cavity 6, in actual use, the separate sand core 5 is integrally formed by sand mold casting mold, the lower end of separate sand core 5 is provided with sand core positioning seat, and the sand core positioning seat is adapted to the sand core seat of the casting mold, so as to place the separate sand core 5.

[0016] The utility model uses the following process: first, use the sand mold casting mold method to make the pouring system; after the mold is made, pouring can be started; during pouring, molten steel enters from the pouring basin at the upper end of the vertical gate 1, enters the cross gate 2 after passing through the vertical gate 1, enters the horizontal gate 3 from the cross gate 2, and the molten steel enters the casting cavity 6 through the straight runner 4 at the upper end of the horizontal gate 3 to fill the mold, and the molten steel rises from bottom to top in the casting cavity 6 and finally flows into the riser to complete the filling; after the filling is completed, the casting is slowly cooled, the casting is desanded, the opening of the casting is welded with a reinforcing rib, the casting with the welded reinforcing rib is heat treated, the casting is assembled and welded when the performance of the casting is stable, and the casting is processed.

[0017] The above description is only a preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0018] The utility model discloses a part of not detailed is prior art.

Claims

1. A sectional casting gating system for large ginning gear ring, comprising a vertical gate (1), a cross gate (2), a horizontal gate (3), a straight gate (4), a partition sand core (5) and a casting cavity (6), characterized in that: The lower end of the sprue (1) is communicated with the center of the cross sprue (2), the outer end of the cross sprue (2) is communicated with the middle part of the runner (3); the casting cavity (6) is located above the runner (3), the lower end surface of the casting cavity (6) is communicated with the runner (3) through the straight sprue (4); four casting cavities (6) are a group, the partition sand core (5) is arranged between the casting cavities (6), and the upper end surface of each casting cavity (6) is provided with the riser (7).

2. A segmented casting gating system for large girth gear for mining as claimed in claim 1, wherein: The arc angle of the casting cavity (6) is 90°.

3. A segmented casting gating system for large girth gear for mining as claimed in claim 1 wherein: The partition sand core (5) comprises the annular sand core (51) and the partition block (52); the partition blocks (52) are uniformly distributed on the outer wall of the annular sand core (51), the interval between the adjacent partition blocks (52) is equal to the interval of the two side walls of the casting cavity (6), and the outer diameter of the annular sand core (51) is matched with the inner diameter of the casting cavity (6).

4. A segmented casting gating system for large girth gear for mining as claimed in claim 1 wherein: The diameters of the cross sprue (2) and the runner (3) are a, the diameter of the straight sprue (4) is b, and a:b=3:2.

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