Anti-deformation casting gating system for large-diameter semicircular steel casting
By improving the casting process to pour the entire ring of two castings and combining it with a specific gating system design, the problem of deformation during the cooling process of large-diameter semi-circular cast steel parts was solved, achieving high-quality and high-yield casting production.
Patent Information
- Application Number
- CN202423289928.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Large-diameter semi-circular cast steel parts are prone to deformation at the opening during the cooling process. The addition of tie rods in the existing process results in low yield and unstable quality.
The process method of changing from pouring a single casting in a semi-circle to pouring two castings in a full circle, combined with the design of vertical runner, horizontal runner, annular runner, outer and inner riser groups and connecting blocks, ensures uniform stress during the solidification process of the casting and eliminates the need for tie rods.
It improved casting quality and yield, reduced molten steel loss, and avoided problems such as tie rod deformation and failure.
Smart Images
Figure CN223902874U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to foundry pouring system technical field, concretely relates to a kind of anti-deformation foundry pouring system for large-diameter semicircular cast steel piece. BACKGROUND
[0002] Pouring large-diameter semicircular cast steel piece, such as Figure 5 As shown in the drawing, the cast piece gross weight is 21250kg, due to the cast piece gross weight is larger, and the cast piece size is larger, because cast piece is half ring structure, uneven stress in the process of shrinkage;If single piece is made in process design, the opening position will expand outward in the process of cooling, leading to deformation at opening, leading to size out-of-tolerance.
[0003] In prior art, to prevent deformation at opening, process method of adding anti-deformation rib at opening position is often used, such as Figure 6 As shown in the drawing;When cast piece pouring is completed, heat treatment is carried out again, so that the performance of cast piece is stable, then remove the tie bar, this process method can effectively prevent cast piece deformation, improve product quality;Existing process design can reduce the risk of cast piece deformation at opening to some extent, but due to the diameter size of cast piece is larger, tie bar is longer, leading to tie bar is heavier, reducing the product yield;And the size of tie bar is smaller, easy to deform and twist, leading to tie bar failure, affecting the quality and yield of cast piece. UTILITY MODEL CONTENTS
[0004] In view of the problems in the background art, the utility model provides an anti-deformation foundry pouring system for large-diameter semicircular cast steel piece, which changes the process method from single cast piece semicircular pouring to two cast piece whole circle pouring, effectively improving the quality and yield of products.
[0005] To achieve the above object, the utility model adopts the following technical scheme: an anti-deformation foundry pouring system for large-diameter semicircular cast steel piece, comprising a first cast piece cavity, a second cast piece cavity, a vertical gate, a horizontal gate, a ring gate, an outer riser group, an inner riser group and a connecting block, the vertical gate is located outside the first cast piece cavity, the lower end of the vertical gate is connected with one end of the horizontal gate, and the other end of the horizontal gate is connected with the ring gate;The ring gate is located below the first cast piece cavity, and the ring gate is connected with the lower end surface of the first cast piece cavity through a straight gate;The upper end surface of the first cast piece cavity is provided with the outer riser group and the inner riser group;
[0006] The first cast piece cavity and the second cast piece cavity are the same structure and symmetrically distributed, and the end surfaces of the first cast piece cavity and the second cast piece cavity are connected through the connecting block.
[0007] The upper end face of the first casting cavity is a stepped face, the horizontal height of the outer stepped face is higher than the height of the inner stepped face; the outer riser groups are uniformly distributed above the outer stepped face of the first casting cavity; and the inner riser groups are uniformly distributed above the inner stepped face of the first casting cavity.
[0008] The connecting block is matched with the connecting faces of the first casting cavity and the second casting cavity.
[0009] The outer end faces of the first casting cavity and the second casting cavity are uniformly provided with a plurality of chills.
[0010] The outer riser groups and the inner riser groups are composed of a plurality of risers.
[0011] The anti-deformation casting pouring system for large-diameter semicircular cast steel pieces has the advantages that the pouring system changes the process method, pours from a single casting semicircle to two casting whole circles, makes the stress of the casting more uniform during the solidification and shrinkage process, and effectively improves the product quality; the pouring system cancels the setting of the reinforcing rib, reduces the molten steel loss during pouring, and effectively improves the product yield. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 The drawing is a schematic view of the utility model.
[0013] Figure 2 The drawing is a schematic view of the pouring system of the first casting cavity.
[0014] Figure 3 The drawing is a schematic view in the A direction.
[0015] Figure 4 The drawing is a side view of the connecting block.
[0016] Figure 5 The drawing is a schematic view of the first casting cavity.
[0017] Figure 6 The drawing is a schematic view of the prior art.
[0018] In the drawing: 11, first casting cavity; 12, second casting cavity; 2, vertical gate; 3, horizontal gate; 4, annular gate; 5, straight gate; 6, chill; 7, outer riser group; 8, inner riser group; 9, connecting block. DETAILED DESCRIPTION
[0019] The technical solutions of the utility model will be described clearly and completely in combination with the drawings of the specification. Obviously, the described embodiments are only some of the embodiments of the utility model, rather than all the embodiments; based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] The accompanying drawings are incorporated in and constitute a part of this specification and will be understood by those skilled in the art. Figures 1-5 The utility model discloses a further detailed description of the specific implementation of the utility model: a kind of anti-deformation casting pouring system for large diameter semicircular cast steel, including first casting cavity 11, second casting cavity 12, vertical gate 2, horizontal gate 3, ring gate 4, outer riser group 7, inner riser group 8 and connecting block 9, the vertical gate 2 is located the outside of first casting cavity 11, and the upper end of vertical gate 2 is connected with the pouring gate seat, and the lower end of vertical gate 2 is connected with one end of horizontal gate 3, and the other end of horizontal gate 3 is connected with ring gate 4;The ring gate 4 is located below first casting cavity 11, and the ring gate 4 is connected with the lower end surface of first casting cavity 11 by straight gate 5;The upper end surface of first casting cavity 11 is provided with outer riser group 7 and inner riser group 8;The outer riser group 7 and inner riser group 8 are composed of multiple risers;The upper end surface of the first casting cavity 11 is stepped surface, and the horizontal height of outer step surface is higher than the height of inner step surface;The outer riser group 7 is evenly distributed above the outer step surface of first casting cavity 11;The inner riser group 8 is evenly distributed above the inner step surface of first casting cavity 11;In actual design, outer riser group 7 and inner riser group 8 are located at the nodule of the upper end surface of first casting cavity 11, because the diameter of nodule is larger, it can better prevent the shrinkage of castings;
[0021] The first casting cavity 11 and the second casting cavity 12 are the same structure and symmetrically distributed, and the end surfaces of the first casting cavity 11 and the second casting cavity 12 are connected by the connecting block 9;To prevent shrinkage of castings at this place, a riser is provided above the connecting block 9 in actual application;A plurality of chills 6 are evenly distributed on the outer end surfaces of the first casting cavity 11 and the second casting cavity 12, which can prevent the shrinkage and deformation of the castings and improve the quality of the castings;The connecting surface of the connecting block 9 is adapted to the first casting cavity 11 and the second casting cavity 12;The width of the connecting block 9 should meet the cutting needs of the castings after production, and should ensure the machining allowance in subsequent processing.
[0022] The utility model uses the following process: first, the pouring system is made by using the sand mold casting method; after the mold is made, pouring can be started; during pouring, the molten steel enters from the sprue seat at the upper end of the vertical sprue 2, enters the horizontal sprue 3 after passing through the vertical sprue 2, and then enters the annular sprue 4 from the horizontal sprue 3; the molten steel enters the first casting cavity 11 and the second casting cavity 12 through the straight sprue 5 at the upper end of the inner annular sprue 4 to fill the mold; the molten steel rises from bottom to top in the first casting cavity 11 and the second casting cavity 12; after the molten steel passes through the first casting cavity 11 and the second casting cavity 12, it finally enters the outer riser group 7 and the inner riser group 8 to complete the filling of the mold; after the casting is poured, the casting is cooled; after subsequent processing, the performance of the casting is stable; then the first casting cavity 11 and the second casting cavity 12 are separated from the connecting block 9 by using a cutting torch.
[0023] The above description is only a preferred embodiment of the utility model and is not used to limit the utility model; any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
[0024] The parts not described in detail in the utility model are prior art.
Claims
1. A deformation prevention casting gating system for large diameter semi-circular steel castings, comprising a first casting cavity (11), a second casting cavity (12), a vertical sprue (2), a horizontal sprue (3), a ring-shaped sprue (4), an outer riser group (7), an inner riser group (8) and a connecting block (9), characterized in that: The vertical gate (2) is located outside the first casting cavity (11), the lower end of the vertical gate (2) is communicated with one end of the cross gate (3), the other end of the cross gate (3) is communicated with the annular gate (4); the annular gate (4) is located below the first casting cavity (11), the annular gate (4) is communicated with the lower end surface of the first casting cavity (11) through the straight gate (5); the upper end surface of the first casting cavity (11) is provided with the outer riser group (7) and the inner riser group (8); The first casting cavity (11) and the second casting cavity (12) are the same in structure and symmetrically distributed, and the end surfaces of the first casting cavity (11) and the second casting cavity (12) are communicated through the connecting block (9).
2. A system for casting a large diameter semi-circular steel casting without distortion according to claim 1, wherein: The upper end surface of the first casting cavity (11) is a stepped surface, the horizontal height of the outer step surface is higher than the height of the inner step surface; the outer riser group (7) is uniformly distributed above the outer step surface of the first casting cavity (11); the inner riser group (8) is uniformly distributed above the inner step surface of the first casting cavity (11).
3. A system for casting a large diameter semi-circular steel casting without distortion as claimed in claim 1 wherein: The connecting block (9) is matched with the connecting surfaces of the first casting cavity (11) and the second casting cavity (12).
4. A system for casting a large diameter semi-circular steel casting without distortion as claimed in claim 1 wherein: Multiple chills (6) are uniformly distributed on the outer end surfaces of the first casting cavity (11) and the second casting cavity (12).
5. A system for casting a large diameter semi-circular steel casting without distortion as claimed in claim 1 wherein: The outer riser group (7) and the inner riser group (8) are composed of multiple risers.