Control moulding bed and method for ultra-large stainless steel casing wax mould runner surface

Abstract

The invention relates to the technical field of stainless steel casing investment casting, in particular to a control moulding bed and method for an ultra-large stainless steel casing wax mould runner surface. The control moulding bed comprises an annular plate body; a first annular boss and a second annular boss are arranged on the top surface of the annular plate body; an annular groove is formed between the first annular boss and the second annular boss; an inner ring runner surface limiting block and an outer ring runner surface limiting block are placed in the annular groove; a wedge-shaped block is inserted between the inner ring runner surface limiting block and the outer ring runner surface limiting block, and the wedge-shaped block is used for expanding the inner ring runner surface limiting block and the outer ring runner surface limiting block in the radial direction; a first limiting molded surface is arranged on the inner ring runner surface limiting block and is used for abutting against an inner ring runner surface of an inner ring body of the wax mold split body; and a second limiting molded surface is arranged on the outer ring runner surface limiting block and is used for abutting against the outer ring runner surface of the outer ring body of the wax mold split body.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel casing investment casting, and in particular to a control mold and method for a flow channel surface of a super-large stainless steel casing wax mold. Background Art

[0002] The weight of a super-large stainless steel casing casting reaches 998Kg, and the maximum outer dimension reaches 2 meters. Due to equipment limitations and cost considerations, the wax model was not made into an integral molding mold. Instead, the wax model was made in parts based on the support plate, and the parts were spliced ​​into an integral wax model.

[0003] Combination Figure 1 As shown, the casing wax mold split includes an inner ring body and an outer ring body. After the casing wax mold split is manufactured, a wax mold base mold is needed to support the wax mold split for cooling. The outer peripheral surface C of the inner ring body is the inner annular flow path surface of the wax mold, and the inner peripheral surface D of the outer ring body is the outer annular flow path surface of the wax mold.

[0004] Combination Figure 1 The wax mold is placed on an annular plate, and an annular stopper is provided on the annular plate. The inner circumference of the annular stopper abuts against the outer circumference of the bottom of the inner ring of the wax mold, and is used to control the size of the inner annular flow channel of the wax mold. Figure 1 As shown in A in the middle. The outer peripheral surface of the annular limit platform abuts against the inner peripheral surface of the bottom of the outer ring body of the wax model split body, which is used to control the size of the outer annular flow channel surface of the wax model, such as Figure 1 As shown in B.

[0005] However, when using the above-mentioned wax mold, the annular limit platform on the annular plate body hinders the shrinkage of the flange edges at the lower ends of the inner ring body and the outer ring body. Since the structure of the wax mold split is unstable, the limiting method of the above-mentioned wax mold mold has no limit effect on the wax mold flow path surface, which can easily lead to the flow path surface dimensional accuracy failing to meet the requirements. Summary of the invention

[0006] The main purpose of the present invention is to provide a control mold and method for the flow path surface of an ultra-large stainless steel casing wax mold, aiming to solve the above technical problems.

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

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

[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 inwardly to form an arc-shaped support platform, and the arc-shaped support platform is used to be supported on 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 path surface limit block; the first stop is used to abut against the inner side wall of the annular groove to limit the radial position of the inner annular flow path surface limit block.

[0013] Preferably, a second stop is provided at the bottom end of the outer annular flow path surface limit 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 path surface limit block.

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

[0015] S1, preparing a wax mold split, and quickly moving the wax mold split into a control mold after it is ejected from the mold, so that the first annular boss of the annular plate body is supported on the lower end surface of the inner ring body of the wax mold split, and the second annular boss is supported on the lower end surface of the outer ring body of the wax mold split;

[0016] S2, placing the inner ring flow path surface limit block and the outer ring flow path surface limit block in the annular groove of the annular plate body, and inserting a wedge block between the inner ring flow path surface limit block and the outer ring flow path surface limit block; the wedge block simultaneously pushes the inner ring flow path surface limit block and the outer ring flow path surface limit block to be spread apart in the radial direction, so that the first limit surface of the inner ring flow path surface limit block abuts against the inner ring flow path surface of the inner ring body, and the second limit surface of the outer ring flow path surface limit block abuts against the outer ring flow path surface of the outer ring body;

[0017] S3, after the wax mold is cooled, take out the wedge block, the inner annular flow path limit block and the outer annular flow path limit block;

[0018] S4, reshaping the cooled wax model parts;

[0019] S5, evenly distributing the modified wax model split pieces on the annular plate in an annular shape, so that the first annular boss of the annular plate is supported on the lower end surface of the inner ring body of the wax model split piece, and the second annular boss is supported on the lower end surface of the outer ring body of the wax model split piece;

[0020] S6, repeating the operation of step S2 inside each wax model split;

[0021] S7. All wax model parts are spliced ​​together. After the splicing is completed, all wedge blocks, inner annular flow path limit blocks and outer annular flow path limit blocks are taken out to obtain an integral wax model.

[0022] Preferably, in step S2, a wedge block is inserted between the inner annular flow path limit block and the outer annular flow path limit block, and when the wedge block moves down into place, the first stopper at the bottom end of the inner annular flow path limit block is required to abut against the inner side wall of the annular groove, and the second stopper at the bottom end of the outer annular flow path limit block is required to abut against the outer side wall of the annular groove.

[0023] Preferably, in step S1 and step S5, after the wax model is placed 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 end of the support column is used to support the flange edge of the top of the outer ring body.

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

[0025] In the present invention, an inner flow path limit block and an outer flow path limit block are placed in an annular groove of an annular plate body, and a wedge block is inserted between the inner flow path limit block and the outer flow path limit block, and the wedge block is used to simultaneously push the inner flow path limit block and the outer flow path limit block to expand radially, so that the first limit surface of the inner flow path limit block abuts against the inner flow path surface of the inner ring body, and the second limit surface of the outer flow path limit block abuts against the outer flow path surface of the outer ring body; whether in the cooling process of the wax mold split or in the process of splicing the wax mold split, the inner and outer flow path surfaces of the wax mold split can be limited and supported to ensure the dimensional accuracy of the flow path surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

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

[0029] Explanation of the accompanying drawings: 1. Flange edge; 2. Support column; 3. Annular plate body; 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 limit block; 9a. First limit profile; 9b. First stop; 10. Outer annular flow channel surface limit block; 10a. Second limit profile; 10b. Second stop; 11. Wedge block. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0032] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

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

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

[0035] Furthermore, a support column 2 is provided on the top surface of the annular plate body 3 near the outer peripheral edge, and the top end of the support column 2 is used to support the flange edge 1 at the top of the outer ring body 5 of the wax model split body. 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.

[0036] In this embodiment, the top of the support column 2 extends inward to form an arc-shaped support platform 6, and the arc-shaped support platform 6 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 path stop block 9; the first stop 9b is used to abut against the inner side wall of the annular groove 8 to limit the radial position of the inner annular flow path stop block 9. A second stop 10b is provided at the bottom end of the outer annular flow path stop 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 path stop block 10.

[0038] On the other hand, the present embodiment also provides a method for controlling the flow path surface of an ultra-large stainless steel casing wax mold, using the above-mentioned control mold, comprising the following steps:

[0039] S1, prepare a wax mold split, and quickly move the wax mold split into a control mold after it is ejected from the mold, so that the first annular boss 3a of the annular plate body 3 is supported on the lower end surface of the inner ring body 4 of the wax mold split, and the second annular boss 3b is supported on the lower end surface of the outer ring body 5 of the wax mold split;

[0040] S2, placing the inner ring flow path surface limit block 9 and the outer ring flow path surface limit block 10 in the annular groove 8 of the annular plate body 3, and inserting a wedge block 11 between the inner ring flow path surface limit block 9 and the outer ring flow path surface limit block 10; the wedge block 11 simultaneously pushes the inner ring flow path surface limit block 9 and the outer ring flow path surface limit block 10 to open radially respectively, so that the first limit surface 9a of the inner ring flow path surface limit block 9 abuts against the inner ring flow path surface of the inner ring body 4, and the second limit surface 10a of the outer ring flow path surface limit block 10 abuts against the outer ring flow path surface of the outer ring body 5;

[0041] S3, after the wax mold is cooled, take out the wedge block 11, the inner annular flow path limit block 9 and the outer annular flow path limit block 10;

[0042] S4, reshaping the cooled wax model parts;

[0043] S5, evenly distribute the modified wax mold parts in an annular shape on the annular plate 3, so that the first annular boss 3a of the annular plate 3 is supported on the lower end surface of the inner ring body 4 of the wax mold parts, and the second annular boss 3b is supported on the lower end surface of the outer ring body 5 of the wax mold parts;

[0044] S6, repeating the operation of step S2 inside each wax model split;

[0045] S7, splicing all wax model parts, after which all wedge blocks 11, inner annular flow path limit blocks 9 and outer annular flow path limit blocks 10 are taken out to obtain an integral wax model.

[0046] In step S2, a wedge block 11 is inserted between the inner annular flow path limit block 9 and the outer annular flow path limit block 10, and when the wedge block 11 is lowered into place, the first stop 9b at the bottom end of the inner annular flow path limit block 9 is required to abut against the inner side wall of the annular groove 8 to limit the radial position of the inner annular flow path limit block 9 and prevent the inner annular flow path limit block 9 from excessively moving inward in the radial direction and damaging the inner ring body. Similarly, the second stop 10b at the bottom end of the outer annular flow path limit block 10 is required to abut against the outer side wall of the annular groove 8 to limit the radial position of the outer annular flow path limit block 10 and prevent the outer annular flow path limit block 10 from excessively moving outward in the radial direction and damaging the inner ring body.

[0047] In the step S1 and step S5, after the wax model is placed on the annular plate body 3, a support column 2 is placed on the top surface of the annular plate body 3 near the outer peripheral edge, and the top end of the support column 2 is used to support the flange edge 1 at the top of the outer ring body 5. When placing the support column 2, the support column 2 is first placed on the top surface of the annular plate body 3, and then the support column 2 is pushed in the radial inward direction E, and under the guidance of the chamfer 7 of the arc-shaped support platform 6, the arc-shaped support platform 6 is supported on the bottom surface of the flange edge 1 at the top of the outer ring body 5.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A control mold for the flow surface of an ultra-large stainless steel casing wax mold, characterized in that: It comprises an annular plate body (3); a first annular boss (3a) and a second annular boss (3b) are arranged on the top surface of the annular plate body; the first annular boss (3a) is used to support an inner ring body (4) of the wax model split body, and the second annular boss (3b) is used to support an outer ring body (5) of the wax model split body; An annular groove (8) is formed between the first annular boss (3a) and the second annular boss (3b); An inner annular flow path surface limit block (9) and an outer annular flow path surface limit block (10) are placed in the annular groove (8); a wedge block (11) is inserted between the inner annular flow path surface limit block (9) and the outer annular flow path surface limit block (10), and the wedge block (11) is used to expand the inner annular flow path surface limit block (9) and the outer annular flow path surface limit block (10) respectively in the radial direction; A first limiting profile (9a) is provided on the inner annular flow channel surface limiting block (9), and the first limiting profile (9a) is used to abut against the inner annular flow channel surface of the inner ring body (4) of the wax model split body; A second limiting profile (10a) is provided on the outer annular flow channel surface limiting block (10), and the second limiting profile (10a) is used to abut against the outer annular flow channel surface of the outer ring body (5) of the wax model split body.

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

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

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

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

6. The control mold for the flow surface of the super-large stainless steel casing wax mold as claimed in claim 1, characterized in that: A first stop (9b) is provided at the bottom end of the inner annular flow path surface limit block (9); the first stop (9b) is used to abut against the inner side wall of the annular groove (8) to limit the radial position of the inner annular flow path surface limit block (9).

7. The control mold for the flow surface of the super-large stainless steel casing wax mold as claimed in claim 1, characterized in that: A second stop (10b) is provided at the bottom end of the outer annular flow path surface limit 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 path surface limit block (10).

8. A method for controlling the flow path surface of a super-large stainless steel casing wax mold, characterized in that: The control tire mold according to any one of claims 1 to 7 comprises the following steps: S1, preparing a wax model split, and after the wax model split is removed from the mold, quickly moving it into a control mold, so that the first annular boss (3a) of the annular plate body (3) is supported on the lower end surface of the inner ring body (4) of the wax model split, and the second annular boss (3b) is supported on the lower end surface of the outer ring body (5) of the wax model split; S2, placing the inner ring flow path surface limit block (9) and the outer ring flow path surface limit block (10) in the annular groove (8) of the annular plate body (3), and inserting a wedge block (11) between the inner ring flow path surface limit block (9) and the outer ring flow path surface limit block (10); the wedge block (11) simultaneously pushes the inner ring flow path surface limit block (9) and the outer ring flow path surface limit block (10) to expand radially respectively, so that the first limit profile (9a) of the inner ring flow path surface limit block (9) abuts against the inner ring flow path surface of the inner ring body (4), and the second limit profile (10a) of the outer ring flow path surface limit block (10) abuts against the outer ring flow path surface of the outer ring body (5); S3, after the wax mold is separated and cooled, the wedge block (11), the inner annular flow path limit block (9) and the outer annular flow path limit block (10) are taken out; S4, reshaping the cooled wax model parts; S5, evenly distributing the multiple wax model splits after shaping on the annular plate (3) in an annular shape, so that the first annular boss (3a) of the annular plate (3) is supported on the lower end surface of the inner ring body (4) of the wax model split, and the second annular boss (3b) is supported on the lower end surface of the outer ring body (5) of the wax model split; S6, repeating the operation of step S2 inside each wax model split; S7, all wax model parts are spliced ​​together. After the splicing is completed, all wedge blocks (11), inner annular flow path surface limit blocks (9) and outer annular flow path surface limit blocks (10) are taken out to obtain an integral wax model.

9. A method for controlling the flow path surface of a super-large stainless steel casing wax mold as claimed in claim 8, characterized in that: In step S2, a wedge block (11) is inserted between the inner annular flow path limit block (9) and the outer annular flow path limit block (10), and when the wedge block (11) is lowered into place, the first stopper (9b) at the bottom end of the inner annular flow path limit block (9) is required to abut against the inner side wall of the annular groove (8), and the second stopper (10b) at the bottom end of the outer annular flow path limit block (10) is required to abut against the outer side wall of the annular groove (8).

10. A control method for the flow path surface of a super-large stainless steel casing wax mold as claimed in claim 8, characterized in that: In step S1 and step S5, after the wax model 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 end of the support column (2) is used to support the flange edge (1) at the top of the outer ring body (5).

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