A control mold and method for the flow path surface of an ultra-large stainless steel casing wax mold

Abstract

This invention relates to the field of stainless steel casing investment casting technology, and particularly to a control mold and method for the runner surface of an ultra-large stainless steel casing wax model. The control mold includes an annular plate; a first annular boss and a second annular boss are provided on the top surface of the annular plate; an annular groove is formed between the first annular boss and the second annular boss; an inner annular runner surface limiting block and an outer annular runner surface limiting block are placed in the annular groove; a wedge block is inserted between the inner annular runner surface limiting block and the outer annular runner surface limiting block, the wedge block being used to radially expand the inner annular runner surface limiting block and the outer annular runner surface limiting block respectively; a first limiting surface is provided on the inner annular runner surface limiting block, the first limiting surface being used to abut against the inner annular runner surface of the inner annular body of the wax model; a second limiting surface is provided on the outer annular runner surface limiting block, the second limiting surface being used to abut against the outer annular runner surface of the outer annular body of the wax model.

Description

Technical Field

[0001] This invention relates to the field of stainless steel casing investment casting technology, and in particular to a control mold and method for the flow channel surface of an ultra-large stainless steel casing wax mold. Background Technology

[0002] A certain ultra-large stainless steel casing casting weighs 998 kg and has a maximum outer dimension of 2 meters. Due to equipment limitations and cost considerations, the wax model was not made into an integral mold. Instead, the wax model was made in parts using support plates, and the parts were then spliced ​​together to form an integral wax model.

[0003] Combination Figure 1 As shown, the casing wax model consists of an inner ring and an outer ring. After the casing wax model is manufactured, a wax model mold is needed to support and cool it. The outer circumferential surface C of the inner ring is the inner ring flow channel surface of the wax model, and the inner circumferential surface D of the outer ring is the outer ring flow channel surface of the wax model.

[0004] Combination Figure 1 The diagram shows a schematic of a wax model mold structure used in the prior art. The wax model is placed on an annular plate, and an annular limiting platform is provided on the annular plate. The inner circumferential surface of the annular limiting platform abuts against the outer circumferential surface of the bottom of the inner annular body of the wax model, used to control the size of the inner annular flow channel surface of the wax model. Figure 1 As shown at point A. The outer circumferential surface of the annular limiting platform abuts against the inner circumferential surface of the bottom of the outer annular body of the wax model, used to control the dimensions of the outer annular flow channel surface of the wax model, as shown. Figure 1 As shown at point B in the middle.

[0005] However, when using the above-mentioned wax mold template, the annular limiting platform on the annular plate body hinders the shrinkage of the flange edge at the lower end of the inner and outer annular bodies. Because the structure of the wax mold is unstable, the limiting method of the above-mentioned wax mold template does not have a limiting effect on the flow channel surface of the wax mold, which can easily lead to the inability to meet the requirements of the dimensional accuracy of the flow channel surface. Summary of the Invention

[0006] The main objective of this invention is to propose a control mold and method for the flow channel surface of an ultra-large stainless steel casing wax mold, aiming to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, on the one hand, the present invention proposes an ultra-large stainless steel casing wax mold flow channel surface control mold, comprising an annular plate; a first annular boss and a second annular boss are provided on the top surface of the annular plate; the first annular boss is used to support the inner ring body of the wax mold, and the second annular boss is used to support the outer ring body of the wax mold; an annular groove is formed between the first annular boss and the second annular boss; an inner annular flow channel surface limiting block and an outer annular flow channel surface limiting block are placed in the annular groove. A wedge-shaped block is inserted between the inner ring flow channel surface limiting block and the outer ring flow channel surface limiting block. The wedge-shaped block is used to radially expand the inner ring flow channel surface limiting block and the outer ring flow channel surface limiting block respectively. A first limiting surface is provided on the inner ring flow channel surface limiting block. The first limiting surface is used to abut against the inner ring flow channel surface of the inner ring body of the wax model. A second limiting surface is provided on the outer ring flow channel surface limiting block. The second limiting surface is used to abut against the outer ring flow channel surface of the outer ring body of the wax model.

[0008] Preferably, a support column is provided on the top surface of the annular plate near the outer peripheral edge, and the top of the support column is used to support the flange edge of the top of the outer ring of the wax mold.

[0009] Preferably, the support column is arc-shaped, and the inner arc surface of the support column abuts against the outer peripheral surface of the second annular boss.

[0010] Preferably, the top of the support column extends inward to form an arc-shaped support platform, which is used to support the bottom surface of the top flange edge of the outer ring body.

[0011] Preferably, a chamfer is provided at the inner edge of the arc-shaped support platform.

[0012] Preferably, a first stop is provided at the bottom end of the inner annular flow channel surface limiting block; the first stop is used to abut against the inner sidewall of the annular groove to limit the radial position of the inner annular flow channel surface limiting block.

[0013] Preferably, a second stop is provided at the bottom end of the outer annular flow channel surface limiting block; the second stop is used to abut against the outer side wall of the annular groove to limit the radial position of the outer annular flow channel surface limiting block.

[0014] On the other hand, the present invention also provides a method for controlling the flow channel surface of an ultra-large stainless steel casing wax mold, which uses the above-mentioned control mold and includes the following steps:

[0015] S1. Prepare the wax model parts. After the wax model parts are demolded, they are quickly moved into the control mold, so that the first annular boss of the annular plate is supported on the lower end face of the inner ring of the wax model parts, and the second annular boss is supported on the lower end face of the outer ring of the wax model parts.

[0016] S2. Place the inner annular flow channel surface limiting block and the outer annular flow channel surface limiting block in the annular groove of the annular plate, and insert a wedge block between the inner annular flow channel surface limiting block and the outer annular flow channel surface limiting block; the wedge block simultaneously pushes the inner annular flow channel surface limiting block and the outer annular flow channel surface limiting block to expand radially, so that the first limiting surface of the inner annular flow channel surface limiting block abuts against the inner annular flow channel surface of the inner annular body, and so that the second limiting surface of the outer annular flow channel surface limiting block abuts against the outer annular flow channel surface of the outer annular body;

[0017] S3. After the wax model has cooled down, remove the wedge block, the inner annular flow channel surface limiting block, and the outer annular flow channel surface limiting block.

[0018] S4. Trim the cooled wax model into separate parts;

[0019] S5. Distribute the modified wax model pieces evenly in a ring on the ring plate, so that the first ring boss of the ring plate is supported on the lower end face of the inner ring of the wax model piece, and the second ring boss is supported on the lower end face of the outer ring of the wax model piece.

[0020] S6. Repeat step S2 inside each wax model section;

[0021] S7. Assemble all the wax model pieces. After assembly, remove all the wedge blocks, inner annular flow channel surface limiting blocks, and outer annular flow channel surface limiting blocks to obtain the overall wax model.

[0022] Preferably, in step S2, a wedge block is inserted between the inner annular flow channel surface limiting block and the outer annular flow channel surface limiting block, and when the wedge block moves down to its position, the first stop at the bottom of the inner annular flow channel surface limiting block is required to abut against the inner sidewall of the annular groove, and the second stop at the bottom of the outer annular flow channel surface limiting block is required to abut against the outer sidewall of the annular groove.

[0023] Preferably, in steps S1 and S5, after the wax mold is placed separately on the annular plate, a support column is placed on the top surface of the annular plate near the outer peripheral edge, and the top of the support column supports the flange edge of the top of the outer ring.

[0024] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0025] In this invention, by placing the inner and outer ring flow channel surface limiting blocks in the annular groove of the annular plate, and inserting wedge blocks between the inner and outer ring flow channel surface limiting blocks, the wedge blocks simultaneously push the inner and outer ring flow channel surface limiting blocks to open radially, so that the first limiting surface of the inner ring flow channel surface limiting block abuts against the inner ring flow channel surface of the inner ring body, and the second limiting surface of the outer ring flow channel surface limiting block abuts against the outer ring flow channel surface of the outer ring body; whether during the cooling process of the wax model or during the splicing process of the wax model, the inner and outer ring flow channel surfaces of the wax model can be limited and supported, ensuring the dimensional accuracy of the flow channel surfaces. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the wax mold structure used in the prior art;

[0028] Figure 2 This is a schematic diagram of the structure of the control mold for the flow channel surface of the ultra-large stainless steel casing wax mold provided by the present invention.

[0029] Explanation of reference numerals: 1. Flange edge; 2. Support column; 3. Annular plate; 3a. First annular boss; 3b. Second annular boss; 4. Inner ring body; 5. Outer ring body; 6. Arc-shaped support platform; 7. Chamfer; 8. Annular groove; 9. Inner annular flow channel surface limiting block; 9a. First limiting surface; 9b. First stop; 10. Outer annular flow channel surface limiting block; 10a. Second limiting surface; 10b. Second stop; 11. Wedge block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0033] Combination Figure 1 As shown, the casing wax model consists of an inner ring body 4 and an outer ring body 5. After the casing wax model is manufactured, a wax model mold is needed to support the wax model for cooling. The outer circumferential surface C of the inner ring body 4 is the inner annular flow channel surface of the wax model, and the inner circumferential surface D of the outer ring body 5 is the outer annular flow channel surface of the wax model.

[0034] Combination Figure 2 As shown, this embodiment provides a control mold for the flow channel surface of an ultra-large stainless steel casing wax mold, including an annular plate 3; a first annular boss 3a and a second annular boss 3b are provided on the top surface of the annular plate; the first annular boss 3a is used to support the inner ring 4 of the wax mold, and the second annular boss 3b is used to support the outer ring 5 of the wax mold; an annular groove 8 is formed between the first annular boss 3a and the second annular boss 3b; an inner annular flow channel surface limiting block 9 and an outer annular flow channel surface limiting block 10 are placed in the annular groove 8; A wedge-shaped block 11 is inserted between the inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10. The wedge-shaped block 11 is used to spread the inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10 radially. A first limiting surface 9a is provided on the inner annular flow channel surface limiting block 9, which is used to abut against the inner annular flow channel surface of the inner annular body 4 of the wax model. A second limiting surface 10a is provided on the outer annular flow channel surface limiting block 10, which is used to abut against the outer annular flow channel surface of the outer annular body 5 of the wax model.

[0035] Furthermore, a support column 2 is provided on the top surface of the annular plate 3 near its outer peripheral edge. The top end of the support column 2 is used to support the flange edge 1 on the top of the outer ring 5 of the wax mold. The support column 2 is arc-shaped, and its inner arc surface abuts against the outer peripheral surface of the second annular boss 3b.

[0036] In this embodiment, the top of the support column 2 extends inward to form an arc-shaped support platform 6, which is used to support the bottom surface of the top flange edge 1 of the outer ring body 5. Furthermore, a chamfer 7 is provided at the inner edge of the arc-shaped support platform 6.

[0037] Combination Figure 2 As shown, a first stop 9b is provided at the bottom end of the inner annular flow channel surface limiting block 9; the first stop 9b is used to abut against the inner sidewall of the annular groove 8, limiting the radial position of the inner annular flow channel surface limiting block 9. A second stop 10b is provided at the bottom end of the outer annular flow channel surface limiting block 10; the second stop 10b is used to abut against the outer sidewall of the annular groove 8, limiting the radial position of the outer annular flow channel surface limiting block 10.

[0038] On the other hand, this embodiment also provides a method for controlling the flow channel surface of an ultra-large stainless steel casing wax mold, which uses the above-mentioned control mold and includes the following steps:

[0039] S1. Prepare the wax model parts. After the wax model parts are demolded, they are quickly moved into the control mold, so that the first annular boss 3a of the annular plate 3 is supported on the lower end face of the inner ring 4 of the wax model parts, and the second annular boss 3b is supported on the lower end face of the outer ring 5 of the wax model parts.

[0040] S2. The inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10 are placed in the annular groove 8 of the annular plate 3, and a wedge block 11 is inserted between the inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10; the wedge block 11 simultaneously pushes the inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10 to expand radially, so that the first limiting surface 9a of the inner annular flow channel surface limiting block 9 abuts against the inner annular flow channel surface of the inner annular body 4, and the second limiting surface 10a of the outer annular flow channel surface limiting block 10 abuts against the outer annular flow channel surface of the outer annular body 5;

[0041] S3. After the wax mold has cooled down, remove the wedge block 11, the inner annular flow channel surface limiting block 9, and the outer annular flow channel surface limiting block 10.

[0042] S4. Trim the cooled wax model into separate parts;

[0043] S5. The modified wax mold pieces are evenly distributed in a ring on the ring plate 3, so that the first ring boss 3a of the ring plate 3 is supported on the lower end face of the inner ring 4 of the wax mold pieces, and the second ring boss 3b is supported on the lower end face of the outer ring 5 of the wax mold pieces.

[0044] S6. Repeat step S2 inside each wax model section;

[0045] S7. Assemble all the wax model parts. After the assembly is completed, remove all the wedge blocks 11, inner annular flow channel surface limiting blocks 9 and outer annular flow channel surface limiting blocks 10 to obtain the whole wax model.

[0046] In step S2, a wedge block 11 is inserted between the inner annular flow channel surface limiting block 9 and the outer annular flow channel surface limiting block 10. When the wedge block 11 descends to its position, the first stop 9b at the bottom of the inner annular flow channel surface limiting block 9 is required to abut against the inner sidewall of the annular groove 8, restricting the radial position of the inner annular flow channel surface limiting block 9 and preventing the inner annular flow channel surface limiting block 9 from excessively moving inward along the radial direction and damaging the inner annular body. Similarly, the second stop 10b at the bottom of the outer annular flow channel surface limiting block 10 is required to abut against the outer sidewall of the annular groove 8, restricting the radial position of the outer annular flow channel surface limiting block 10 and preventing the outer annular flow channel surface limiting block 10 from excessively moving outward along the radial direction and damaging the inner annular body.

[0047] In steps S1 and S5, after the wax model is placed separately on the annular plate 3, a support column 2 is placed on the top surface of the annular plate 3 near the outer peripheral edge. The top of the support column 2 supports the flange edge 1 of the top of the outer ring 5. When placing the support column 2, it is first placed on the top surface of the annular plate 3, and then pushed in a radially inward direction E. Under the guidance of the chamfered angle 7 of the arc-shaped support platform 6, the arc-shaped support platform 6 is supported on the bottom surface of the top flange edge 1 of the outer ring 5.

[0048] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control mold for the flow channel surface of an ultra-large stainless steel casing wax mold, characterized in that, It includes an annular plate (3); a first annular boss (3a) and a second annular boss (3b) are provided on the top surface of the annular plate; the first annular boss (3a) is used to support the inner ring (4) of the wax mold assembly, and the second annular boss (3b) is used to support the outer ring (5) of the wax mold assembly. An annular groove (8) is formed between the first annular boss (3a) and the second annular boss (3b). An inner annular flow channel surface limiting block (9) and an outer annular flow channel surface limiting block (10) are placed in the annular groove (8); a wedge block (11) is inserted between the inner annular flow channel surface limiting block (9) and the outer annular flow channel surface limiting block (10), and the wedge block (11) is used to spread the inner annular flow channel surface limiting block (9) and the outer annular flow channel surface limiting block (10) radially respectively; A first limiting surface (9a) is provided on the inner ring flow channel surface limiting block (9), and the first limiting surface (9a) is used to abut against the inner ring flow channel surface of the inner ring body (4) of the wax model; A second limiting surface (10a) is provided on the outer ring flow channel surface limiting block (10), and the second limiting surface (10a) is used to abut against the outer ring flow channel surface of the outer ring body (5) of the wax mold; A first stop (9b) is provided at the bottom end of the inner annular flow channel surface limiting block (9); the first stop (9b) is used to abut against the inner sidewall of the annular groove (8) to limit the radial position of the inner annular flow channel surface limiting block (9); A second stop (10b) is provided at the bottom end of the outer annular flow channel surface limiting block (10); the second stop (10b) is used to abut against the outer side wall of the annular groove (8) to limit the radial position of the outer annular flow channel surface limiting block (10).

2. The control mold for the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 1, characterized in that, A support column (2) is provided on the top surface of the annular plate (3) near the outer peripheral edge. The top of the support column (2) is used to support the flange edge (1) on the top of the outer ring (5) of the wax mold.

3. The control mold for the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 2, characterized in that, The support column (2) is arc-shaped, and the inner arc surface of the support column (2) abuts against the outer peripheral surface of the second annular boss (3b).

4. The control mold for the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 3, characterized in that, The top of the support column (2) extends inward to form an arc-shaped support platform (6), which is used to support the bottom surface of the top flange edge (1) of the outer ring body (5).

5. The control mold for the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 4, characterized in that, A chamfer (7) is provided at the inner edge of the arc-shaped support platform (6).

6. A method for controlling the flow channel surface of an ultra-large stainless steel casing wax mold, characterized in that, The controlled tire model according to any one of claims 1 to 5 includes the following steps: S1. Prepare the wax model parts. After the wax model parts are demolded, they are quickly moved into the control mold so that the first annular boss (3a) of the annular plate (3) is supported on the lower end face of the inner ring (4) of the wax model parts, and the second annular boss (3b) is supported on the lower end face of the outer ring (5) of the wax model parts. S2. Place the inner ring flow channel surface limiting block (9) and the outer ring flow channel surface limiting block (10) in the annular groove (8) of the annular plate (3), and insert a wedge block (11) between the inner ring flow channel surface limiting block (9) and the outer ring flow channel surface limiting block (10); the wedge block (11) simultaneously pushes the inner ring flow channel surface limiting block (9) and the outer ring flow channel surface limiting block (10) to open radially, so that the first limiting surface (9a) of the inner ring flow channel surface limiting block (9) abuts against the inner ring flow channel surface of the inner ring body (4), and the second limiting surface (10a) of the outer ring flow channel surface limiting block (10) abuts against the outer ring flow channel surface of the outer ring body (5); S3. After the wax mold has cooled down, remove the wedge block (11), the inner annular flow channel surface limiting block (9), and the outer annular flow channel surface limiting block (10). S4. Trim the cooled wax model into separate parts; S5. The modified wax mold pieces are evenly distributed in a ring on the ring plate (3), so that the first ring boss (3a) of the ring plate (3) is supported on the lower end face of the inner ring (4) of the wax mold pieces, and the second ring boss (3b) is supported on the lower end face of the outer ring (5) of the wax mold pieces. S6. Repeat step S2 inside each wax model section; S7. Assemble all the wax model parts. After the assembly is completed, remove all the wedge blocks (11), inner ring flow channel surface limiting blocks (9) and outer ring flow channel surface limiting blocks (10) to obtain the whole wax model.

7. The method for controlling the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 6, characterized in that, In step S2, a wedge block (11) is inserted between the inner annular flow channel surface limiting block (9) and the outer annular flow channel surface limiting block (10). When the wedge block (11) moves down to its position, the first stop (9b) at the bottom of the inner annular flow channel surface limiting block (9) is required to abut against the inner sidewall of the annular groove (8), and the second stop (10b) at the bottom of the outer annular flow channel surface limiting block (10) is required to abut against the outer sidewall of the annular groove (8).

8. The method for controlling the flow channel surface of an ultra-large stainless steel casing wax mold as described in claim 6, characterized in that, In steps S1 and S5, after the wax mold is placed on the annular plate (3), a support column (2) is placed on the top surface of the annular plate (3) near the outer peripheral edge, and the top of the support column (2) supports the flange edge (1) of the top of the outer ring (5).

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