Verticality correction tool and method for titanium alloy casting

Abstract

The invention relates to the technical field of precision investment casting, in particular to a perpendicularity correction tool and method for a titanium alloy casting. The perpendicularity correcting tool comprises a base and a concentric rotating disc. The concentric turntable is of a cylindrical structure; the concentric rotating disc is installed in a counter bore in the center of the top face of the base, and the outer cylindrical face of the concentric rotating disc is in sliding fit with the counter bore of the base. A step-shaped accommodating hole is formed in the concentric turntable, and is used for accommodating a disc-shaped body and a lower column body of the titanium alloy casting; the central axis of the concentric rotating disc coincides with the theoretical axis of an upper column body of the clamped titanium alloy casting. A stand column is arranged on the top face of the base, a horizontal screw rod is screwed on the stand column, and the screw rod is used for abutting against an upper column body of the titanium alloy casting. A pressing plate mechanism is arranged on the top face of the base and used for being vertically pressed on a disc-shaped body of the titanium alloy casting. And the titanium alloy casting can be corrected at all angles.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a verticality correction tool and method for titanium alloy castings. Background Art

[0002] In investment casting, there are many factors that lead to deformation of castings, such as deformation of wax patterns, deformation of heat treatment, deformation of repair welding, etc., especially thin-walled castings or castings with large length and width differences are prone to deformation during the post-casting process.

[0003] Combination Figure 1 , which is a schematic diagram of the structure of a titanium alloy casting. The titanium alloy casting comprises a disc-shaped body 100, an upper column 101 is integrally formed on the top surface of the disc-shaped body 100, and a lower column 102 is integrally formed on the bottom surface of the disc-shaped body 100. The eccentricity between the axis of the upper column 101 and the lower column 102 is Z.

[0004] After the titanium alloy casting is cast, the upper column 101 is relatively long, which may easily lead to the upper column 101 not meeting the verticality requirement relative to the disc-shaped body 100 .

[0005] Due to the special structure of the titanium alloy casting, it is inconvenient to correct the tilted upper column 101, so a verticality correction tool and method for the titanium alloy casting is urgently needed. Summary of the invention

[0006] The main purpose of the present invention is to provide a verticality correction tool and method for titanium alloy castings, aiming to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a verticality correction tool for titanium alloy castings, comprising a base and a concentric turntable; the concentric turntable is a cylindrical structure; the concentric turntable is installed in a countersunk hole at the center position of the top surface of the base, and the outer cylindrical surface of the concentric turntable is slidably matched with the countersunk hole of the base; a stepped accommodating hole is provided on the concentric turntable, and the accommodating hole is used to accommodate the disk body and the lower column of the titanium alloy casting; the central axis of the concentric turntable coincides with the theoretical axis of the upper column of the clamped titanium alloy casting; a column is provided on the top surface of the base, and a horizontal screw is screwed on the column, and the screw is used to tighten on the upper column of the titanium alloy casting; a pressure plate mechanism is provided on the top surface of the base, which is used to vertically press on the disk body of the titanium alloy casting.

[0008] Preferably, the column is integrally formed on the top surface of the base near one of the side edges.

[0009] Preferably, one end of the screw rod close to the titanium alloy casting is arranged as a tightening end, and a fitting block is arranged between the tightening end and the upper column of the titanium alloy casting.

[0010] Preferably, a semi-cylindrical groove is provided on the end surface of the fitting block; the diameter of the groove is the same as the outer diameter of the upper cylinder of the titanium alloy casting.

[0011] Preferably, the pressure plate mechanism includes a stud, a pressure plate and a locking nut; the lower end of the stud is screwed onto the base, and the upper end of the stud passes through the pressure plate and is screwed onto the locking nut; one end of the pressure plate is used to vertically press on the disc-shaped body of the titanium alloy casting.

[0012] Preferably, an adjusting screw is screwed on one end of the pressure plate away from the titanium alloy casting; the adjusting screw is vertically arranged, and the lower end of the adjusting screw abuts against the base.

[0013] Preferably, a sinking platform is provided on the top surface of the base; and the lower end of the adjusting screw abuts against the horizontal surface of the sinking platform.

[0014] Preferably, one end of the screw rod away from the titanium alloy casting is arranged as a wrench fitting end; and the wrench fitting end is an external hexagonal structure.

[0015] On the other hand, this embodiment also provides a method for correcting the verticality of a titanium alloy casting, using the above-mentioned verticality correction tool, comprising the following steps:

[0016] S1. Install the titanium alloy casting to be corrected in the receiving hole of the concentric turntable;

[0017] S2, by rotating the concentric turntable, the inclination direction of the upper cylinder is aligned with the screw, and then the pressing plate mechanism is used to vertically press the upper cylinder onto the disc-shaped body of the titanium alloy casting;

[0018] S3, after heating the titanium alloy casting to be corrected together with the correction tool to a predetermined temperature, start screwing in the screw, and use the screw to apply pressure to the upper column on the titanium alloy casting for thermal correction;

[0019] S4. After cooling, detect the inclination direction of the upper column on the titanium alloy casting, release the pressure plate mechanism, and repeat steps S3 to S3 to perform thermal correction again until the verticality of the upper column relative to the disc-shaped body meets the requirements.

[0020] Preferably, in step S3, before starting to screw in the screw, a fitting block is installed on the outer cylindrical surface of the upper cylinder, and lubricating oil is applied to the end surface of the tightening end of the screw and the tightening surface of the fitting block respectively, and the screw is screwed in so that its tightening end is tightened on the fitting block.

[0021] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0022] (1) By using the verticality correction tool provided by the present invention, when in use, the titanium alloy casting to be corrected is installed in the receiving hole of the concentric turntable; by rotating the concentric turntable, the inclination direction of the upper column is aligned with the screw, and then the pressing plate mechanism is used to vertically press the disc-shaped body of the titanium alloy casting; after the titanium alloy casting to be corrected is heated to a predetermined temperature together with the correction tool, the screw is screwed in, and the screw is used to apply pressure to the upper column on the titanium alloy casting for thermal correction. The effect of rapid correction of the titanium alloy casting is achieved.

[0023] (2) In the verticality correction tooling provided by the present invention, since the outer cylindrical surface of the concentric turntable and the countersunk hole of the base are slidably matched, the concentric turntable can be rotated to correct the titanium alloy casting at all angles, thereby improving the casting production efficiency and reducing the tooling cost of casting production. 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 It is a schematic diagram of the structure of a titanium alloy casting;

[0026] Figure 2 A schematic diagram of using the verticality correction tool provided by the present invention to perform correction;

[0027] Figure 3 This is a cross-sectional view of the verticality correction tool provided by the present invention when performing correction.

[0028] Explanation of the accompanying drawings: 1. Base; 1a. Column; 1b. Sink; 2. Concentric turntable; 2a. Accommodating hole; 3. Screw; 3a. Tightening end; 3b. Wrench fitting end; 4. Fitting piece; 4a. Groove; 5. Stud; 6. Pressure plate; 7. Locking nut; 8. Adjusting screw; 100. Disc-shaped body; 101. Upper column; 102. Lower column. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] Combination Figure 2 , Figure 3 As shown, on the one hand, this embodiment provides a verticality correction tool for titanium alloy castings, including a base 1 and a concentric turntable 2; the concentric turntable 2 is a cylindrical structure; the concentric turntable 2 is installed in a countersunk hole at the center position of the top surface of the base 1, and the outer cylindrical surface of the concentric turntable 2 is slidably matched with the countersunk hole of the base 1; a stepped accommodating hole 2a is provided on the concentric turntable 2, and the accommodating hole 2a is used to accommodate the disc-shaped body 100 and the lower column 102 of the titanium alloy casting; the central axis of the concentric turntable 2 coincides with the theoretical axis of the upper column 101 of the clamped titanium alloy casting; a column 1a is provided on the top surface of the base 1, and a horizontal screw 3 is screwed on the column 1a, and the screw 3 is used to tighten on the upper column 101 of the titanium alloy casting; a pressure plate mechanism is provided on the top surface of the base 1, which is used to vertically press on the disc-shaped body 100 of the titanium alloy casting.

[0032] Furthermore, the column 1a is integrally formed on the top surface of the base 1 near one of the side edges. The integrally formed method has a simple structure, and the base 1 and the column 1a can be processed from the block.

[0033] In the present invention, one end of the screw rod 3 close to the titanium alloy casting is set as a tightening end 3a, and a fitting block 4 is provided between the tightening end 3a and the upper column 101 of the titanium alloy casting. The purpose of providing the fitting block 4 is to prevent the upper column 101 of the titanium alloy casting from being damaged by the screw rod 3. Furthermore, a semi-cylindrical groove 4a is provided on the end surface of the fitting block 4; the diameter of the groove 4a is the same as the outer diameter of the upper column 101 of the titanium alloy casting. When in use, the groove 4a of the fitting block 4 is stuck on the upper column 101.

[0034] Combination Figure 2As shown, the pressing plate mechanism includes a stud 5, a pressing plate 6 and a locking nut 7; the lower end of the stud 5 is screwed on the base 1, and the upper end of the stud 5 is screwed with the locking nut 7 after passing through the pressing plate 6; one end of the pressing plate 6 is used to vertically press on the disc-shaped body 100 of the titanium alloy casting. When pressing, the pressing plate 6 can be pressed on the disc-shaped body 100 by tightening the locking nut 7. Further, an adjusting screw 8 is screwed on the end of the pressing plate 6 away from the titanium alloy casting; the adjusting screw 8 is vertically arranged, and the lower end of the adjusting screw 8 abuts against the base 1. By rotating the adjusting screw 8, the pressing force can be fine-tuned. Specifically, after the adjusting screw 8 is screwed in downward and the lower end of the adjusting screw 8 abuts against the base 1, the adjusting screw 8 is continued to be screwed in to raise the A end of the pressing block 6 and lower the B end, so that the casting can be further pressed.

[0035] Combination Figure 2 As shown, in order to facilitate observation of the contact between the lower end of the adjusting screw 8 and the base 1, a sink 1b is provided on the top surface of the base 1; the lower end of the adjusting screw 8 rests on the horizontal surface of the sink 1b.

[0036] Combination Figure 3 As shown, in order to facilitate the use of a wrench to rotate the screw rod 3, the end of the screw rod 3 away from the titanium alloy casting is set as a wrench matching end 3b; the wrench matching end 3b is an outer hexagonal structure for matching with a wrench.

[0037] On the other hand, this embodiment also provides a method for correcting the verticality of a titanium alloy casting, using the above-mentioned verticality correction tool, comprising the following steps:

[0038] S1, installing the titanium alloy casting to be corrected in the receiving hole 2a of the concentric turntable 2;

[0039] S2, by rotating the concentric turntable 2, the upper cylinder 101 is aligned with the screw 3 in the tilting direction, and then the upper cylinder 101 is vertically pressed on the disc-shaped body 100 of the titanium alloy casting by using the pressing plate mechanism;

[0040] S3, after the titanium alloy casting to be corrected is heated together with the correction tool to a predetermined temperature, the screw 3 is screwed in, and the screw 3 is used to apply pressure to the upper column 101 on the titanium alloy casting for thermal correction;

[0041] S4. After cooling, detect the tilt direction of the upper column 101 on the titanium alloy casting, release the pressure plate mechanism, repeat steps S3 to S3 to perform thermal correction again until the verticality of the upper column 101 relative to the disc-shaped body 100 meets the requirements.

[0042] In step S3, before starting to screw in the screw rod 3, install the fitting block 4 on the outer cylindrical surface of the upper cylinder 101, and apply lubricating oil to the end surface of the tightening end 3a of the screw rod 3 and the tightening surface of the fitting block 4 respectively, and screw in the screw rod 3 so that its tightening end 3a is tightened on the fitting block 4.

[0043] The verticality correction tool provided in this embodiment has a concentric rotating disk 2 movably mounted on the base 1, and the fitting block 4 is also a loose block structure. Therefore, the correction requirements of castings of different shapes and sizes can be met by replacing the concentric rotating disk 2 and the fitting block 4. In other words, due to the design of the concentric rotating disk and the fitting block, the tool structure has ductility.

[0044] 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 verticality correction tool for titanium alloy castings, characterized in that: It comprises a base (1) and a concentric turntable (2); the concentric turntable (2) is a cylindrical structure; The concentric turntable (2) is installed in a countersunk hole at the center position of the top surface of the base (1), and the outer cylindrical surface of the concentric turntable (2) is slidably matched with the countersunk hole of the base (1); A stepped receiving hole (2a) is provided on the concentric turntable (2), and the receiving hole (2a) is used to receive the disk-shaped body (100) and the lower column (102) of the titanium alloy casting; the central axis of the concentric turntable (2) coincides with the theoretical axis of the upper column (101) of the clamped titanium alloy casting; A column (1a) is arranged on the top surface of the base (1), and a horizontal screw (3) is screwed on the column (1a), and the screw (3) is used to tighten against the upper column (101) of the titanium alloy casting; A pressing plate mechanism is arranged on the top surface of the base (1) for vertically pressing the disc-shaped body (100) of the titanium alloy casting.

2. A verticality correction tool for titanium alloy castings as claimed in claim 1, characterized in that: The upright column (1a) is integrally formed on the top surface of the base (1) near one of the side edges.

3. A verticality correction tool for titanium alloy castings as claimed in claim 1, characterized in that: One end of the screw rod (3) close to the titanium alloy casting is arranged as a tightening end (3a), and a fitting block (4) is arranged between the tightening end (3a) and the upper column (101) of the titanium alloy casting.

4. A verticality correction tool for titanium alloy castings as claimed in claim 3, characterized in that: A semi-cylindrical groove (4a) is arranged on the end surface of the fitting block (4); the diameter of the groove (4a) is the same as the outer diameter of the upper cylinder (101) of the titanium alloy casting.

5. The verticality correction tool for titanium alloy castings according to claim 1, characterized in that: The pressure plate mechanism comprises a stud (5), a pressure plate (6) and a locking nut (7); the lower end of the stud (5) is screwed onto the base (1), and the upper end of the stud (5) passes through the pressure plate (6) and is screwed onto the locking nut (7); one end of the pressure plate (6) is used to vertically press onto the disc-shaped body (100) of the titanium alloy casting.

6. A verticality correction tool for titanium alloy castings as claimed in claim 5, characterized in that: An adjusting screw (8) is screwed onto one end of the pressure plate (6) away from the titanium alloy casting; the adjusting screw (8) is vertically arranged, and the lower end of the adjusting screw (8) abuts against the base (1).

7. A verticality correction tool for titanium alloy castings as claimed in claim 6, characterized in that: A sinking platform (1b) is provided on the top surface of the base (1); the lower end of the adjusting screw (8) abuts against the horizontal surface of the sinking platform (1b).

8. A verticality correction tool for titanium alloy castings as claimed in claim 1, characterized in that: One end of the screw rod (3) away from the titanium alloy casting is arranged as a wrench fitting end (3b); the wrench fitting end (3b) is an external hexagonal structure.

9. A method for correcting the verticality of a titanium alloy casting, characterized in that: The verticality correction tool according to any one of claims 1 to 8 is used, comprising the following steps: S1. Installing the titanium alloy casting to be corrected in the receiving hole (2a) of the concentric turntable (2); S2, by rotating the concentric turntable (2), the inclination direction of the upper column (101) is aligned with the screw (3), and then the upper column (101) is vertically pressed on the disc-shaped body (100) of the titanium alloy casting by using a pressing plate mechanism; S3, after the titanium alloy casting to be corrected is heated together with the correction tool to a predetermined temperature, the screw (3) is screwed in, and the screw (3) is used to apply pressure to the upper column (101) on the titanium alloy casting to perform thermal correction; S4, after cooling, detect the tilt direction of the upper column (101) on the titanium alloy casting, release the pressure plate mechanism, repeat steps S3 to S3 to perform thermal correction again until the verticality of the upper column (101) relative to the disc-shaped body (100) meets the requirements.

10. A method for correcting the verticality of a titanium alloy casting according to claim 1, characterized in that: In step S3, before starting to screw in the screw rod (3), a fitting block (4) is installed on the outer cylindrical surface of the upper cylinder (101), and lubricating oil is applied to the end surface of the tightening end (3a) of the screw rod (3) and the tightening surface of the fitting block (4), respectively, and the screw rod (3) is screwed in so that its tightening end (3a) is pressed tightly against the fitting block (4).

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