Whole-circle heating plate partition riser for casting
By using a ring-shaped heating plate to isolate the riser design, the problem of pasty solidification in the center of the flange of large-scale mining mill ring-shaped castings was solved, achieving a dense structure and dimensional stability of the castings, and improving casting quality and production efficiency.
Patent Information
- Application Number
- CN202520011950.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-01-03
AI Technical Summary
In existing casting processes, the central part of the flange of large mining mill ring-shaped castings is prone to pasty solidification, resulting in loose structure and deformation, which affects product quality.
The design employs a full-circle heating plate with a riser partition, which includes a combination of flange sand core, full-circle riser, heating plate, chills and gating system. Through the evenly distributed stiffeners and partition plate structure, the solidification process of molten steel is controlled, avoiding the pasty solidification in the center.
It effectively solved the problem of loose structure in the center of the casting, ensuring that the dimensions and quality of the casting meet the standards, and improving the product yield and enterprise benefits.
Smart Images
Figure CN223902875U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to foundry technology field, concretely relates to a whole circle heating plate partitioning riser for casting. BACKGROUND
[0002] Riser refers to the supplementary part attached to the top or side of the casting to avoid defects in the casting; for large whole circle type (ring gear, flange) castings, the current process method is: multiple risers are placed on the large ring gear surface according to the calculation of the casting hot spot, the size of the riser is 1.5 times the hot spot, the distance between the risers is 3 times the hot spot, and a hanging sand cold iron is placed in the middle of the riser, the size of the cold iron is the same as the hot spot of the casting, and the hanging sand is 10-20mm. This casting process is simulated, and the riser is more reasonable on the flange surface of the casting, there is no defect between the risers, and the overall scheme of the casting process is feasible, but the flange end surface of the casting produced by adopting the process scheme is detected according to JB / T7233-89 standard 2 level flaw detection, and the flange middle layer part between the risers is found to have an excessive defect, and the detection result shows that the part between the risers of the whole circle type casting flange cannot obtain dense organization in actual production. The main reason is that the temperature distribution of the flange center part is relatively flat in a certain period of solidification, the flange center part tends to paste-like solidification, loose organization is generated, the casting is deformed, and the product quality is affected. CONTENT
[0003] The utility model aims at overcoming the defects of the prior art, providing a whole circle heating plate partitioning riser, which can solve the problem that the flange center part tends to paste-like solidification, loose organization is generated, and the casting is deformed.
[0004] The purpose of the utility model can be achieved by adopting the following technical scheme:
[0005] A whole circle heating plate partitioning riser for casting, comprising a flange sand core and a whole circle riser arranged on the flange sand core, wherein the flange sand core is a ring-shaped cavity structure, a ring-shaped horizontal rib plate is arranged in the ring, a plurality of through holes are arranged on the plate surface of the horizontal rib plate, a vertical rib plate is arranged vertically between adjacent through holes, a boss is arranged every interval on the end surface of the vertical rib plate, and the whole circle riser is arranged on the upper end surface of the flange sand core and communicates with the upper end surface.
[0006] The whole circle riser comprises a heating plate A, a heating plate B, a riser, an outer cold iron A, an outer cold iron B and a pouring system; the heating plate A and the heating plate B are circular ring structures formed by two whole circles, and the heating plate B is arranged on the outer side of the heating plate A; the diameter of the heating plate B is greater than that of the heating plate A, a plurality of partition plates are arranged uniformly between the heating plate A and the heating plate B, and the inside of the heating plate A and the heating plate B is divided into a plurality of cavity partitions; and the riser is arranged on the upper end of the boss and communicates with the boss.
[0007] The outer chill B is uniformly arranged at the outer diameter surface of the heating plate B; and the outer chill A is uniformly arranged at the inner diameter surface of the flange sand core.
[0008] The pouring system is arranged at the bottom of the flange sand core and is arranged in communication with the flange sand core.
[0009] The riser is provided with a riser cover, and the riser height is consistent with the riser diameter.
[0010] The flange sand core, the horizontal rib plate, the vertical rib plate, the riser and the pouring system are in communication with each other.
[0011] The heating plate A is arranged according to the shape of the flange sand core at a position not being round, and the inner diameter is 20-50mm smaller than the inner diameter of the flange sand core on a single side, and the thickness of the heating plate A is 50-70mm.
[0012] The diameter of the heating plate B is 20-50mm larger than the maximum diameter of the flange sand core on a single side, and the thickness of the heating plate B is 50-70mm.
[0013] The outer chill A and the outer chill B are square hanging sand chills with a volume of 250-400mm.
[0014] The thickness of the partition plate is 100-140mm.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] The utility model has the advantages that the overall design is novel, a plurality of dispersed risers in the prior art are replaced by an integral riser, and the integral riser is used in cooperation with a partition plate, a riser, inner and outer chills and a pouring system, so that the shrinkage tension of the riser during pouring of molten steel can be reduced, the problem that the central part of the existing flange casting tends to be paste solidification and produces loose structure, leading to deformation of the casting, can be solved, the size and quality of the finished product after casting can be ensured to meet the requirements of customers, and benefits can be brought to enterprises. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the utility model.
[0018] Figure 2 It is a structural schematic view of the utility model. Figure 1 It is a structural schematic view of the flange sand core.
[0019] Figure 3 It is a bottom view structural view of the utility model. Figure 1
[0020] Marked in the figure: 1, flange sand core, 2, whole circle riser, 11, horizontal rib, 12, through hole, 13, vertical rib, 14, boss, 21, heating plate A, 22, heating plate B, 23, riser, 24, outer chill A, 25, outer chill B, 26, pouring system, 27, partition plate, 28, cavity partition, 29, riser cover. DETAILED DESCRIPTION
[0021] The specific embodiments of the utility model will be further and specifically explained in combination with the drawings.
[0022] As Figures 1-3 shown, a whole circle heating plate partition riser for casting includes a flange sand core 1 and a whole circle riser 2 arranged on it; the flange sand core 1 is a whole ring cavity structure, and a horizontal rib 11 is arranged in the ring; through holes 12 are evenly arranged on the surface of the horizontal rib 11, and vertical ribs 13 are arranged between adjacent through holes 12; bosses 14 are arranged on the end surface of the vertical rib 13 at intervals; the whole circle riser 2 is arranged on the upper end surface of the flange sand core 1 and communicates with the upper end surface.
[0023] The whole circle riser 2 includes a heating plate A 21, a heating plate B 22, a riser 23, an outer chill A 24, an outer chill B 25 and a pouring system 26; the heating plate A 21 and the heating plate B 22 are circular ring structures formed by two whole circles, and the heating plate B 22 is arranged outside the heating plate A 21; the diameter of the heating plate B 22 is greater than that of the heating plate A 21, and a plurality of partition plates 27 are evenly arranged between the heating plate A 21 and the heating plate B 22, and the inside is divided into a plurality of cavity partitions 28; the riser 23 is arranged on the upper end of the boss 14 and communicates with it; a plurality of partition plates 27 are evenly arranged between the heating plate A 21 and the heating plate B 22, which can make the molten steel shrink uniformly in the cavity during shrinkage after pouring, so that the diameters of the upper and lower castings are consistent, and the appearance of a horn mouth is avoided, and the size meets the requirements; the outer chill B 25 is evenly arranged at the outer diameter surface of the heating plate B 22; the outer chill A 24 is evenly arranged at the inner diameter surface of the flange sand core 1; the outer chill A 24 and the outer chill B 25 are square hanging sand chills with a volume of 250-400 mm; there is a hanging sand amount of 10-20 mm between the chill and the casting, the hanging sand can increase the surface hardness and wear resistance of the chill material, and also can increase the adhesion and improve the service life and reduce the maintenance cost.
[0024] The pouring system 26 is arranged at the bottom of the flange sand core 1 and communicates with the flange sand core 1; the flange sand core 1, the horizontal rib plate 11, the vertical rib plate 13, the riser 23 and the pouring system 26 all communicate with each other; the riser 23 is provided with a riser cover 29; the height of the riser 23 is consistent with the diameter of the riser 23; the heating plate A21 is arranged according to the shape of the flange sand core 1 at a position not being round; the inner diameter of the heating plate A21 is 20-50mm smaller than the inner diameter of the flange sand core 1; the thickness of the heating plate A21 is 50-70mm; the diameter of the heating plate B22 is 20-50mm larger than the maximum diameter of the flange sand core 1; the thickness of the heating plate B22 is 50-70mm; the thickness of the partition plate 27 is 100-140mm.
[0025] In use, the whole-circle riser is installed on the flange sand core, the pouring temperature of molten steel is 1555-1565℃, the molten steel is completely filled in pouring, the filling speed at the inner gate is controlled at 1m / s-2m / s, the molten steel is poured from the pouring system, the molten steel enters the flange sand core through the pipeline, the flange sand core cavity and the riser are filled, the casting is normalized and tempered according to the heat treatment requirement, the mechanical property of the casting is ensured, the casting machining surface is rough machined, the roughness requirement reaches the flaw detection requirement, the blank surface is polished to meet the flaw detection requirement, the casting is ultrasonic flaw detected, the casting quality is qualified after the flaw detection, the flange surface is defect-free, and finally the casting is full-size inspected, and the size is qualified after the inspection.
[0026] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A whole-circle heating plate partitioning head for casting, comprising a flange sand core (1) and a whole-circle head (2) arranged thereon; characterized in that: The flange sand core (1) is a whole annular cavity structure, and a horizontal ring plate (11) is arranged in the ring; the horizontal ring plate (11) is provided with uniformly distributed through holes (12) on the plate surface, and vertical ring plates (13) are arranged between adjacent through holes (12); the end surface of the vertical ring plate (13) is provided with a boss (14) every interval; the whole-circle riser (2) is arranged on the upper end surface of the flange sand core (1) and communicates with the upper end surface.
2. The full circle heat plate dam for casting according to claim 1, characterized in that: The whole-circle riser (2) comprises a heating plate A (21), a heating plate B (22), a riser (23), an outer chill A (24), an outer chill B (25) and a pouring system (26); the heating plate A (21) and the heating plate B (22) are annular structures formed by two whole circles, and the heating plate B (22) is arranged outside the heating plate A (21); the diameter of the heating plate B (22) is greater than that of the heating plate A (21), and a plurality of partition plates (27) are arranged between the heating plate A (21) and the heating plate B (22) and divide the inside into a plurality of cavity partitions (28); the riser (23) is arranged on the upper end of the boss (14) and communicates with the boss (14).
3. The full circle heat panel dam for casting according to claim 2, characterized in that: The outer chill B (25) is uniformly arranged at the outer diameter surface of the heating plate B (22); and the outer chill A (24) is uniformly arranged at the inner diameter surface of the flange sand core (1).
4. The full circle heat panel dam for casting according to claim 2, characterized in that: The pouring system (26) is arranged at the bottom of the flange sand core (1) and communicates with the flange sand core (1).
5. The full circle heat panel dam for casting according to claim 2, characterized in that: The riser (23) is provided with a riser cover (29) on the riser (23), and the height of the riser (23) is consistent with the diameter of the riser (23).
6. The full circle heat panel dam for casting according to claim 2, characterized in that: The flange sand core (1), the horizontal ring plate (11), the vertical ring plate (13), the riser (23) and the pouring system (26) all communicate with each other.
7. The full circle heat panel dam for casting according to claim 2, characterized in that: The heating plate A (21) is arranged according to the shape of the flange sand core (1) at a position that is not round, and the inner diameter is 20-50mm smaller than the single side of the inner diameter of the flange sand core (1), and the thickness of the heating plate A (21) is 50-70mm.
8. The full circle heat panel dam for casting according to claim 2, characterized in that: The diameter of the heating plate B (22) is 20-50mm larger than the single side of the maximum diameter of the flange sand core (1), and the thickness of the heating plate B (22) is 50-70mm.
9. The full circle heat panel riser dam of claim 2 wherein: The outer chill A (24) and the outer chill B (25) are square hanging sand chills with a volume of 250-400mm.
10. The full circle heat panel dam for casting according to claim 2, characterized in that: The thickness of the partition plate (27) is 100-140mm.