Correcting tool and method for aluminum alloy casting of special-shaped structure

Abstract

The invention relates to the technical field of aluminum alloy investment casting, in particular to a correcting tool and method for an aluminum alloy casting of a special-shaped structure. The correcting tool comprises a bottom plate and a pressing plate. A section block assembly is mounted on the bottom surface of the pressing plate; a plurality of supporting movable blocks are placed on the top face of the bottom plate, and a molded surface is arranged on the top of each supporting movable block and used for being supported on the lower surface of an arc-shaped bent part of the aluminum alloy casting of the special-shaped structure. A plurality of positioning movable blocks are placed on the top face of the bottom plate and used for being supported on the lower surface of a base body part of the aluminum alloy casting of the special-shaped structure and positioning the base body part. And during correction, the supporting movable blocks corresponding to the parts with small local deformation are pulled out, the supporting movable blocks corresponding to the parts with large local deformation are reserved, the press machine is used for driving the pressing plate and the mold block assembly to move downwards, and the parts with large local deformation are corrected. The problems existing in integral profiling correction in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy investment casting, and in particular to a correction tool and method for aluminum alloy castings with special-shaped structures. Background Art

[0002] Aluminum alloy investment castings are widely used in the aerospace field. However, aluminum alloy investment castings are prone to deformation during the casting process, especially castings after solution treatment. In order to deliver qualified castings, the deformed castings must be corrected with correction tools.

[0003] Combination Figures 1 to 3 , which is a schematic diagram of the structure of a special-shaped aluminum alloy casting, the special-shaped aluminum alloy casting 100 comprises a base portion 101 and an arc-shaped curved portion 102 integrally formed on the front side of the base portion 101; the middle of the arc-shaped curved portion 102 is hollowed out. After the special-shaped aluminum alloy casting 100 is solution treated, the local deformation of the arc-shaped curved portion 102 is large, and in particular, correction is more difficult.

[0004] The traditional correction method is to use a correction mold for overall correction. The correction mold generally includes an upper mold block and a lower mold block. The corresponding molding surfaces are processed on the upper mold block and the lower mold block respectively. The upper mold block and the lower mold block are used on the press to perform overall press correction on the special-shaped aluminum alloy casting 100. However, due to the large local deformation of the arc-shaped curved portion 102, it is easy to cause the casting to be not corrected in place or to be crushed during the pressure correction process when the part is subjected to overall press correction in the upper mold block and the lower mold block. Summary of the invention

[0005] The main purpose of the present invention is to provide a correction tool and method for special-shaped aluminum alloy castings, aiming to solve the above technical problems.

[0006] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a correction tool for special-shaped structural aluminum alloy castings, comprising a base plate and a pressure plate; a mold block assembly is installed on the bottom surface of the pressure plate; a plurality of supporting blocks are placed on the top surface of the base plate, and the top of each supporting block is provided with a molding surface for supporting on the lower surface of the arc-shaped curved portion of the special-shaped structural aluminum alloy casting; a plurality of positioning blocks are placed on the top surface of the base plate, which are used to support on the lower surface of the base portion of the special-shaped structural aluminum alloy casting and position the base portion.

[0007] Preferably, there are two positioning blocks, namely a first positioning block and a second positioning block; a positioning slot is provided on the convex block on the top of the first positioning block; and a positioning notch is provided on the convex block on the top of the second positioning block.

[0008] Preferably, the number of the supporting blocks is six, and the six supporting blocks and two positioning blocks are placed on the top surface of the base plate in four rows and two columns.

[0009] Preferably, the supporting block includes a first supporting block, a second supporting block, a third supporting block, a fourth supporting block, a fifth supporting block and a sixth supporting block; the first positioning block is arranged in a row with the first supporting block, the second supporting block and the third supporting block; the second positioning block is arranged in a row with the fourth supporting block, the fifth supporting block and the sixth supporting block.

[0010] Preferably, a limiting column is provided on the fourth supporting block, and the top end of the limiting column is used to abut against the lower surface of the pressing plate.

[0011] Preferably, the third supporting block is formed by stacking a first supporting block and a plurality of first cushion blocks; the sixth supporting block is formed by stacking a second supporting block and a plurality of second cushion blocks; the first supporting block and the second supporting block are jointly supported on the lower surface of the arc top of the arc-shaped bending portion.

[0012] Preferably, the mold block assembly consists of a first mold block, a second mold block and a third mold block; the mold block assembly is used to press the upper surface of the arc-shaped curved portion of the special-shaped structural aluminum alloy casting; the first mold block, the second mold block and the third mold block are fastened and installed on the pressure plate by screws and pins respectively.

[0013] Preferably, a pressing block assembly is provided between the top protrusions of the first positioning block and the second positioning block, and the pressing block assembly is used to press tightly on the two side walls of the notch of the base part.

[0014] Preferably, the pressing block assembly is formed by splicing a plurality of pressing block units.

[0015] On the other hand, the present invention also provides a correction method for a special-shaped aluminum alloy casting, using the above-mentioned correction tool, comprising the following steps:

[0016] S1. Install the correction tool on the press;

[0017] S2, placing all supporting blocks and positioning blocks on the bottom plate;

[0018] S3, placing the special-shaped structural aluminum alloy casting to be corrected on the supporting movable block and the positioning movable block; using the supporting movable block to support the lower surface of the arc-shaped curved portion of the special-shaped structural aluminum alloy casting; using the positioning movable block to support the lower surface of the base portion of the special-shaped structural aluminum alloy casting, and positioning the base portion;

[0019] S4, checking the fitting gap between the top profile of each supporting block and the lower surface of the arc-shaped curved portion, and judging the magnitude of the local deformation of the arc-shaped curved portion according to the size of the fitting gap;

[0020] S5. Remove the supporting blocks corresponding to the parts with small local deformation, retain the supporting blocks corresponding to the parts with large local deformation, use the press machine to drive the pressing plate and the block assembly on the pressing plate downward, and correct the parts with large local deformation;

[0021] S6. Repeat steps S2 to S5 until the lower surface of the arc-shaped curved portion fits with the top profile of all supporting blocks, and the correction is completed.

[0022] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0023] In the present invention, by using supporting blocks to support the lower surface of the arc-shaped curved portion of the special-shaped aluminum alloy casting; using positioning blocks to support the lower surface of the base portion of the special-shaped aluminum alloy casting, and positioning the base portion; when correcting, the supporting blocks corresponding to the parts with small local deformation are removed, and the supporting blocks corresponding to the parts with large local deformation are retained, and the pressing plate and the block assembly are driven downward by a press machine to correct the parts with large local deformation. Repeat the above steps until the lower surface of the arc-shaped curved portion fits with the top molding surfaces of all supporting blocks, and the correction is completed. Therefore, the present invention adopts a local correction method to gradually correct the special-shaped aluminum alloy casting, which overcomes the problem in the prior art that the casting is easily not corrected in place or the casting is crushed during the pressure correction process when the overall pressure correction is adopted. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 The structure diagram of special-shaped aluminum alloy castings Figure 1 ;

[0026] Figure 2 The structure diagram of special-shaped aluminum alloy castings Figure 2 ;

[0027] Figure 3 The structure diagram of special-shaped aluminum alloy castings Figure 3 ;

[0028] Figure 4 A schematic diagram of the structure of the correction tool provided by the present invention;

[0029] Figure 5It is a schematic diagram of the structural decomposition of the bottom plate, the supporting movable block and the positioning movable block in the present invention;

[0030] Figure 6 Partial structure of the correction tool provided by the present invention and the aluminum alloy casting Figure 1 ;

[0031] Figure 7 Partial structure of the correction tool provided by the present invention and the aluminum alloy casting Figure 2 ;

[0032] Figure 8 It is a structural schematic diagram of the pressure plate and the block assembly in the present invention;

[0033] Fig. 9 It is a schematic diagram of the structural decomposition of the pressure plate and the block assembly in the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of the special-shaped aluminum alloy casting and the mold block assembly in the present invention;

[0035] Fig.11 This is a schematic diagram of the structure of the correction tooling provided by the present invention when the mold is closed.

[0036] Explanation of the accompanying drawings: 1. Base plate; 2. Pressing plate; 3. Block assembly; 3a. First block; 3b. Second block; 3c. Third block; 4. First positioning movable block; 4a. Positioning slot; 5. Second positioning movable block; 5a. Positioning notch; 6. First supporting movable block; 7. Second supporting movable block; 8. Third supporting movable block; 8a. First supporting block; 8b. First cushion block; 9. Fourth supporting movable block; 10. Fifth supporting movable block; 11. Sixth supporting movable block; 11a. Second supporting block; 11b. Second cushion block; 12. Limiting column; 13. Pressing block assembly; 100. Special-shaped structural aluminum alloy casting; 101. Base portion; 101a. Reinforcing rib; 102. Arc-shaped bending portion. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Combination Figures 4 to 11 As shown, on the one hand, this embodiment provides a correction tool for special-shaped structural aluminum alloy castings, including a base plate 1 and a pressure plate 2; a mold block assembly 3 is installed on the bottom surface of the pressure plate 2; a plurality of supporting blocks are placed on the top surface of the base plate 1, and the top of each supporting block is provided with a molding surface for supporting on the lower surface of the arc-shaped curved portion 102 of the special-shaped structural aluminum alloy casting 100; a plurality of positioning blocks are placed on the top surface of the base plate 1, which are used to support on the lower surface of the base portion 101 of the special-shaped structural aluminum alloy casting 100 and position the base portion 101.

[0041] Combination Figure 5 As shown, there are two positioning blocks, namely, a first positioning block 4 and a second positioning block 5; a positioning slot 4a is provided on the convex block at the top of the first positioning block 4, and a positioning notch 5a is provided on the convex block at the top of the second positioning block 5. During positioning, the convex blocks at the top of the first positioning block 4 and the second positioning block 5 are respectively supported on the lower surface of the base 101, and the reinforcing ribs 101a on the lower surface of the base 101 are stuck in the positioning slot 4a, and the positioning notch 5a matches the protrusion on the lower surface of the base 101.

[0042] Combination Figure 5 As shown, the number of the supporting blocks is six, and the six supporting blocks and the two positioning blocks are placed in four rows and two columns on the top surface of the bottom plate 1. Specifically, the supporting blocks include a first supporting block 6, a second supporting block 7, a third supporting block 8, a fourth supporting block 9, a fifth supporting block 10 and a sixth supporting block 11; the first positioning block 4 is arranged in a row with the first supporting block 6, the second supporting block 7 and the third supporting block 8; the second positioning block 5 is arranged in a row with the fourth supporting block 9, the fifth supporting block 10 and the sixth supporting block 11.

[0043] Furthermore, a limiting column 12 is provided on the fourth supporting block 9, and the top end of the limiting column 12 is used to abut against the lower surface of the pressing plate 2. The limiting column 12 has a limiting effect on the pressing plate 2, and is used to limit the descending height of the pressing plate 2 during correction to avoid crushing parts.

[0044] In this embodiment, the third movable support block 8 is formed by stacking a first support block 8a and a plurality of first cushion blocks 8b; the sixth movable support block 11 is formed by stacking a second support block 11a and a plurality of second cushion blocks 11b; the first support block 8a and the second support block 11a are supported together on the lower surface of the top of the arc of the arc-shaped curved portion 102. By using first cushion blocks 8b of different thicknesses, the height of the third movable support block 8 can be changed. Similarly, by using second cushion blocks 11b of different thicknesses, the height of the sixth movable support block 11 can be changed.

[0045] Combination Figure 8 , Fig. 9 As shown, the mold block assembly 3 is composed of a first mold block 3a, a second mold block 3b and a third mold block 3c; the mold block assembly 3 is used to press the upper surface of the arc-shaped curved portion 102 of the special-shaped aluminum alloy casting 100; the first mold block 3a, the second mold block 3b and the third mold block 3c are respectively fastened and installed on the pressing plate 2 by screws and pins. The mold block assembly 3 adopts a split splicing structure, which is easy to process and manufacture.

[0046] Combination Figure 6 , Figure 7 As shown, a pressing block assembly 13 is provided between the top protrusions of the first positioning block 4 and the second positioning block 5, and the pressing block assembly 13 is used to press on the two side walls of the notch of the base 101 to correct the notch of the base 101. Furthermore, in order to facilitate the manufacture of the pressing block assembly 13, the pressing block assembly 13 is designed to be a structure composed of a plurality of pressing block monomers.

[0047] In this embodiment, eye screws are provided on the side of the base plate 1 , and lifting screws are provided on the side of the pressing plate 2 .

[0048] On the other hand, this embodiment also provides a correction method for a special-shaped aluminum alloy casting, using the above-mentioned correction tool, comprising the following steps:

[0049] S1. Install the correction tool on the press;

[0050] S2, placing all supporting blocks and positioning blocks on the bottom plate 1;

[0051] S3, placing the special-shaped structural aluminum alloy casting 100 to be corrected on the supporting movable block and the positioning movable block; using the supporting movable block to support the lower surface of the arc-shaped curved portion 102 of the special-shaped structural aluminum alloy casting 100; using the positioning movable block to support the lower surface of the base portion 101 of the special-shaped structural aluminum alloy casting 100, and positioning the base portion 101;

[0052] S4, checking the fitting gap between the top profile of each supporting block and the lower surface of the arc-shaped curved portion 102, and judging the magnitude of the local deformation of the arc-shaped curved portion 102 according to the size of the fitting gap;

[0053] S5, remove the supporting blocks corresponding to the parts with small local deformation, retain the supporting blocks corresponding to the parts with large local deformation, use the press machine to drive the pressing plate 2 and the block assembly 3 on the pressing plate 2 downward, and correct the parts with large local deformation;

[0054] S6. Repeat steps S2 to S5 until the lower surface of the arc-shaped curved portion 102 fits with the top surfaces of all the supporting blocks, and the correction is completed.

[0055] 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 correction tool for special-shaped aluminum alloy castings, characterized in that: It comprises a bottom plate (1) and a pressing plate (2); a mold block assembly (3) is installed on the bottom surface of the pressing plate (2); A plurality of supporting blocks are placed on the top surface of the bottom plate (1), and a profile is provided on the top of each supporting block for supporting the lower surface of the arc-shaped curved portion (102) of the special-shaped aluminum alloy casting (100); A plurality of positioning blocks are placed on the top surface of the bottom plate (1) for supporting the lower surface of a base part (101) of a special-shaped aluminum alloy casting (100) and positioning the base part (101).

2. A correction tool for special-shaped aluminum alloy castings as claimed in claim 1, characterized in that: The number of the positioning blocks is two, namely a first positioning block (4) and a second positioning block (5); A positioning slot (4a) is provided on the protrusion on the top of the first positioning movable block (4); A positioning notch (5a) is provided on the protrusion at the top of the second positioning movable block (5).

3. A correction tool for special-shaped aluminum alloy castings as claimed in claim 2, characterized in that: The number of the supporting blocks is six, and the six supporting blocks and two positioning blocks are placed on the top surface of the bottom plate (1) in a manner of four rows and two columns.

4. A correction tool for special-shaped aluminum alloy castings as claimed in claim 3, characterized in that: The supporting blocks include a first supporting block (6), a second supporting block (7), a third supporting block (8), a fourth supporting block (9), a fifth supporting block (10) and a sixth supporting block (11); The first positioning movable block (4) and the first supporting movable block (6), the second supporting movable block (7), and the third supporting movable block (8) are arranged in a row in sequence; The second positioning block (5) is arranged in a row with the fourth supporting block (9), the fifth supporting block (10) and the sixth supporting block (11).

5. A correction tool for special-shaped aluminum alloy castings as claimed in claim 4, characterized in that: A limiting column (12) is arranged on the fourth supporting block (9), and the top end of the limiting column (12) is used to abut against the lower surface of the pressing plate (2).

6. A correction tool for special-shaped aluminum alloy castings as claimed in claim 4, characterized in that: The third supporting movable block (8) is formed by stacking a first supporting block (8a) and a plurality of first cushion blocks (8b); the sixth supporting movable block (11) is formed by stacking a second supporting block (11a) and a plurality of second cushion blocks (11b); the first supporting block (8a) and the second supporting block (11a) are jointly supported on the lower surface of the arc top of the arc-shaped curved portion (102).

7. The correction tool for special-shaped aluminum alloy castings according to claim 1, characterized in that: The mold block assembly (3) consists of a first mold block (3a), a second mold block (3b) and a third mold block (3c); the mold block assembly (3) is used to press the upper surface of the arc-shaped curved portion (102) of the special-shaped aluminum alloy casting (100); the first mold block (3a), the second mold block (3b) and the third mold block (3c) are respectively fastened and installed on the pressure plate (2) by screws and pins.

8. The correction tool for special-shaped aluminum alloy castings according to claim 2, characterized in that: A pressing block assembly (13) is provided between the top protrusions of the first positioning block (4) and the second positioning block (5), and the pressing block assembly (13) is used to press tightly on the two side walls of the notch of the base part (101).

9. A correction tool for special-shaped aluminum alloy castings as claimed in claim 9, characterized in that: The pressing block assembly (13) is formed by splicing a plurality of pressing block units.

10. A method for correcting a special-shaped aluminum alloy casting, characterized in that: The correction tool according to any one of claims 1 to 9 is used, comprising the following steps: S1. Install the correction tool on the press; S2, placing all supporting blocks and positioning blocks on the bottom plate (1); S3, placing the special-shaped structural aluminum alloy casting (100) to be corrected on the supporting movable block and the positioning movable block; using the supporting movable block to support the lower surface of the arc-shaped curved portion (102) of the special-shaped structural aluminum alloy casting (100); using the positioning movable block to support the lower surface of the base portion (101) of the special-shaped structural aluminum alloy casting (100), and positioning the base portion (101); S4, checking the fitting gap between the top profile of each supporting block and the lower surface of the arc-shaped curved portion (102), and judging the magnitude of the local deformation of the arc-shaped curved portion (102) according to the size of the fitting gap; S5, removing the supporting blocks corresponding to the parts with small local deformation, retaining the supporting blocks corresponding to the parts with large local deformation, and using a press machine to drive the pressing plate (2) and the block assembly (3) on the pressing plate (2) downward to correct the parts with large local deformation; S6, repeat steps S2 to S5 until the lower surface of the arc-shaped curved portion (102) fits with the top profiles of all the supporting blocks, and the correction is completed.

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