Complex core deformation detection method

Abstract

The invention discloses a complex mold core deformation detection method which comprises the following steps: placing a mold core provided with a wax mold bushing into a wax mold, and realizing a mold closing process of the wax mold to judge a complex mold core deformation detection process. The wax mold bushing is mounted on the mold core, then the mold core is placed on the wax mold, whether the mold core is deformed or not is judged on the basis of whether the wax mold can be normally closed or not, and the problems that the mold core is deformed, the interval size between the mold core and the wax mold is changed, the wall thickness of the wax mold is out of tolerance, and the mold core is damaged are solved. And therefore, the wall thickness of a casting cast in the later period is out of tolerance.

Description

Technical Field

[0001] The present invention relates to a method for detecting the deformation of a complex core, belonging to the technical field of investment casting. Background Art

[0002] To form the inner cavity structure of a casting, a core needs to be placed in a wax mold before the wax mold is pressed in a wax mold die. After the wax mold is formed by pressing in the wax mold die, the core is inside the wax mold. Then, sand is blasted onto the wax mold to form a sand shell. After the wax is melted and discharged, the space of the previous wax mold is used for casting the casting. After the casting is formed, the core is removed from the casting to present the inner cavity 11 of the casting 1, as Figures 1 to 2 shown.

[0003] However, if the core is deformed during production, it will cause a change in the spacing dimension between the wax mold and the wax mold die, resulting in an out-of-tolerance wall thickness of the wax mold, and thus an out-of-tolerance wall thickness of the later-cast casting. Therefore, it is necessary to detect the deformation of the complex core. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a method for detecting the deformation of a complex core.

[0005] The present invention is achieved through the following technical solutions.

[0006] A method for detecting the deformation of a complex core provided by the present invention includes:

[0007] Placing the core with a wax mold bushing into the wax mold die and implementing the mold closing process of the wax mold die to determine the detection process of the deformation of the complex core.

[0008] The detection process includes Step 1: Normally designing and manufacturing a core die and a wax mold die respectively according to the requirements of the shape, size, shrinkage rate, etc. of the inner cavity of the casting.

[0009] The detection process further includes Step 2: Manufacturing a wax mold bushing die and preparing a wax mold bushing; when manufacturing the wax mold bushing, it is required to ensure that the wax mold bushing can be smoothly sleeved onto the core, and at the same time, the wall thickness of the wax mold bushing must meet the wall thickness tolerance requirements of the final casting.

[0010] The detection process further includes Step 3: Normally preparing the core according to the process requirements.

[0011] The detection process further includes Step 4: Sleeving each wax mold bushing onto the corresponding part of the core.

[0012] The detection process further includes Step 5: Placing the core with the wax mold bushing into the wax mold die and using the state of the wax mold bushing placed in the wax mold die to detect the deformation of the core: when each wax mold bushing area cannot be smoothly placed into the wax mold die simultaneously or affects the mold closing of the wax mold die, it indicates that the deformation amount of the core has exceeded the allowable range and the core cannot be used.

[0013] The detection process further includes Step Six. After the wax mold die can be normally closed, the wax mold is normally made according to the process requirements. At this time, the wax mold bushing and the wax mold are fused into one body to form a complete wax mold. During the process of filling the cavity of the wax mold die with wax liquid, the flexibility of the wax mold bushing is utilized to buffer the impact of the wax liquid on the core.

[0014] The detection process further includes Step Seven. Check and repair the joint part of the wax mold bushing in the complete wax mold, and no gap shall exist.

[0015] The beneficial effect of the present invention lies in that: by installing a wax mold bushing on the core and then placing it on the wax mold die, based on whether the wax mold die can be normally closed, it is judged whether the core manufacturing is deformed, solving the problem that the deformation of the core manufacturing will cause the change of the interval dimension between the core and the wax mold die, resulting in the out-of-tolerance of the wax mold wall thickness, and thus the out-of-tolerance of the wall thickness of the castings cast in the later stage. Description of the Drawings

[0016] Figure 1 is a schematic top view of the casting;

[0017] Figure 2 is Figure 1 the sectional view taken along the line E-E in

[0018] Figure 3 is a schematic distribution diagram of the core with a wax mold bushing installed in the present invention in the wax mold die;

[0019] Figure 4 is the sectional view of the installation of the wax mold bushing and the core in the present invention;

[0020] In the figure: 1 - casting; 11 - inner cavity; 2 - wax mold bushing; 3 - core; 4 - wax mold die. Detailed Embodiment

[0021] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited thereto.

[0022] As Figures 3 to 4 shown.

[0023] A method for detecting deformation of a complex core in the present application includes the following steps:

[0024] Step One, respectively and normally design and manufacture a core die and a wax mold die 4 according to the requirements of the shape, size, shrinkage rate, etc. of the inner cavity of the casting.

[0025] Step 2: According to the requirements of the shape, size, shrinkage rate, etc. of the inner cavity of the casting, select multiple locations (specifically determined according to the inner cavity structure and shape) to design and manufacture wax mold bushing molds with different shape structures respectively, and prepare wax mold bushings 2. Requirements: As a part of the overall wax mold, the outer shape and size of the wax mold bushing 2 shall meet the requirements of the overall wax mold; the wax mold bushing 2 can be freely inserted into the core 3 without being interfered by the structure of the core 3; after the wax mold bushing 2 is inserted into the core 3, the clearance between the wax mold bushing 2 and the core 3 is 0.05 mm to 0.15 mm (specific data is determined according to the allowable tolerance of the casting), so as to ensure that the wax mold bushing 2 can be smoothly inserted into the core 3, but the wall thickness of the wax mold bushing 2 must ensure the wall thickness tolerance requirements of the final casting.

[0026] Step 3: Prepare the core normally according to the process requirements.

[0027] Step 4: Insert each wax mold bushing 2 into the corresponding part of the core 3.

[0028] Step 5: Place the core 3 with the wax mold bushing 2 inserted into the wax mold die 4, as Figure 3 shown. At this time, use the state of the wax mold bushing 2 inserted into the wax mold die 4 to detect the deformation of the core: when each wax mold bushing 2 area cannot be smoothly inserted into the wax mold die 4 at the same time or affects the closing of the wax mold die 4, it indicates that the deformation amount of the core 3 has exceeded the allowable range and the core 3 cannot be used.

[0029] Step 6: After the wax mold die 4 can be normally closed, make the wax mold normally according to the process requirements. At this time, the wax mold bushing 2 and the wax mold are fused into one body to form a complete wax mold; during the process of the wax liquid filling the cavity of the wax mold die 4, utilize the flexibility of the wax mold bushing 2 to buffer the impact of the wax liquid on the core, prevent the core 3 from breaking, and at the same time prevent the core 3 from shifting, resulting in unqualified inner cavity dimensions of the later casting.

[0030] By installing the wax mold bushing 2 on the core 3 and then placing it on the wax mold die 4, and judging whether the core 3 is deformed based on whether the wax mold die 4 can be normally closed, it solves the problem that the deformation of the core during production will cause the interval dimension between the core and the wax mold die to change, resulting in the wall thickness of the wax mold exceeding the tolerance, and thus the wall thickness of the later cast casting exceeding the tolerance.

[0031] Figure 3 The dotted line in

[0032] is a component of the later casting or a component of the casting wax mold. Step 7: Check and repair the joint part of the wax mold bushing 2 in the complete wax mold, and there shall be no gaps to avoid affecting the quality of the subsequent casting. Carry out subsequent operations such as wax mold tree building, shell making, melting and pouring according to the process requirements.

Claims

1. A complex core deformation detection method, characterized in that: include: The core (3) with the wax pattern bushing (2) installed is placed in the wax pattern mold (4), and the wax pattern mold (4) is closed to implement a detection process for determining the deformation of the complex core.

2. The complex core deformation detection method according to claim 1, characterized in that: The detection process comprises step 1, according to the requirements of the inner cavity shape, size and shrinkage rate of the casting, respectively designing and manufacturing the core mold and the wax mold (4).

3. The complex core deformation detection method according to claim 2, characterized in that: The detection process also includes step 2, making a wax model bushing mold and preparing a wax model bushing (2); when the wax model bushing (2) is made, it is required to ensure that the wax model bushing (2) can be smoothly inserted into the core (3), and at the same time, the wall thickness of the wax model bushing (2) must ensure the wall thickness tolerance requirement of the final casting.

4. The complex core deformation detection method according to claim 3, characterized in that: The detection process also includes step three, preparing the core (3) normally according to the process requirements.

5. The complex core deformation detection method according to claim 4, characterized in that: The detection process also includes a fourth step of inserting each wax model bushing (2) into a corresponding position of the core (3).

6. The complex core deformation detection method according to claim 5, characterized in that: The detection process also includes step five, placing the core (3) covered with the wax model bushing (2) into the wax model mold (4), and using the state of the wax model bushing (2) placed in the wax model mold (4) to detect the deformation of the core: when the various wax model bushing (2) areas cannot be smoothly placed in the wax model mold (4) at the same time or affect the closing of the wax model mold (4), it means that the deformation of the core (3) has exceeded the allowable range and the core (3) cannot be used.

7. The complex core deformation detection method according to claim 5, characterized in that: The detection process also includes step six, after the wax mold (4) can be molded normally, the wax mold is normally made according to the process requirements. At this time, the wax mold bushing (2) and the wax mold are integrated into one to form a complete wax mold; during the process of filling the wax mold (4) cavity with wax liquid, the flexibility of the wax mold bushing (2) is used to buffer the impact of the wax liquid on the core.

8. The complex core deformation detection method according to claim 7, characterized in that: The detection process also includes step seven, checking the joint position of the wax model bushing (2) in the complete wax model to ensure that no gap exists.

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