Casting correction method and equipment

Abstract

The invention provides a casting correction method and equipment, and relates to the technical field of casting. The casting correction method comprises the following steps: carrying out analogue simulation analysis on a casting three-dimensional model to obtain correction parameters; the casting product is subjected to heat treatment, so that the casting product is in a yield stage; and based on the correction parameters, performing interference correction on the casting product by adopting correction equipment. Correction parameters can ensure the stability of a correction result; and on the basis of the correction parameters, the correction equipment is adopted for conducting interference correction on the casting product, after correction is completed, the casting product can rebound and deform, and therefore the casting product finally meets the design requirement, and correction of the casting product is completed.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to a casting correction method. Background Art

[0002] Thin plate castings are prone to deformation during casting or heat treatment. After the castings are deformed, they need to be corrected to meet the process requirements.

[0003] The existing correction method is generally manual correction, which requires manual observation of the casting deformation and correction of the casting by knocking, etc. The correction efficiency is low, the correction time is long, and the stability of the correction result cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to provide a casting correction method and equipment to solve the technical problem that the casting correction effect is not good in the prior art.

[0005] In a first aspect, the present invention provides a casting correction method, comprising:

[0006] Conduct simulation analysis on the three-dimensional model of the casting to obtain correction parameters;

[0007] Heat treatment is performed on the casting products to bring them into the yield stage;

[0008] Based on the correction parameters, correction equipment is used to perform interference correction on the casting products.

[0009] In an optional embodiment, a simulation analysis is performed on the three-dimensional model of the casting using stress analysis software, including inputting material parameters of the three-dimensional model of the casting into the stress analysis software.

[0010] In an optional embodiment, the correction device includes at least two groups of clamps, each group of clamps includes an upper clamp and a lower clamp that are arranged opposite to each other.

[0011] In an optional embodiment, a simulation analysis is performed on the three-dimensional model of the casting using stress analysis software, including inputting the horizontal position of each set of clamps into the stress analysis software.

[0012] In an optional embodiment, a stress analysis software is used to perform simulation analysis on the three-dimensional model of the casting, including inputting the longitudinal position of the upper clamp and the longitudinal position of the lower clamp in each set of clamps into the stress analysis software.

[0013] In an optional embodiment, both the upper chuck and the lower chuck include a height adjustment mechanism, and the correction device adjusts the height adjustment mechanisms on the upper chuck and the lower chuck based on the correction parameters before performing interference correction on the casting product.

[0014] In an optional embodiment, the correction parameters include the pressing force of the correction device and the deformation amount of the casting three-dimensional model.

[0015] In an optional embodiment, when performing interference correction on the casting, interference correction is performed on the periphery of the casting first, and then interference correction is performed on the middle of the casting.

[0016] The casting correction method provided by the present invention can ensure the stability of the correction result by performing simulation analysis on the three-dimensional model of the casting to obtain correction parameters; heat treatment is performed on the casting product to put the casting product in the yield stage, and the casting is thermally corrected; based on the correction parameters, correction equipment is used to perform interference correction on the casting product. After the correction is completed, the casting product will undergo springback deformation, so that the casting product finally meets the design requirements, and the correction of the casting product is completed.

[0017] In a second aspect, the present invention provides a casting correction device for implementing the casting correction method according to any one of the aforementioned embodiments, comprising at least two groups of clamps, each group of clamps comprising an upper clamp and a lower clamp arranged opposite to each other, the upper clamp and the lower clamp both comprising a height adjustment mechanism, the height adjustment mechanism comprising a base and a pressure block, the base and the pressure block are movably connected, and at least one adjustment plate may be provided between the base and the pressure block.

[0018] In an optional embodiment, a connecting column and an elastic member are provided between the base and the pressing block, and the adjusting sheet is provided with a notch, and the notch of the adjusting sheet can be inserted into the connecting column.

[0019] The casting correction equipment provided by the present invention is used to implement the casting correction method according to any of the aforementioned embodiments. The height adjustment mechanism includes a base, a pressure block and an adjustment plate, which is convenient for quickly adjusting the longitudinal positions of the upper chuck and the lower chuck, thereby meeting the requirements of different correction parameters for the correction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the cooling deformation process of thin plate castings;

[0022] Figure 2 A schematic diagram of the casting deformation process state of the casting correction method provided by an embodiment of the present invention;

[0023] Figure 3A schematic diagram of the state of the casting correction device provided by an embodiment of the present invention before correction;

[0024] Figure 4 A schematic diagram of the state of the casting correction device provided by an embodiment of the present invention during correction;

[0025] Figure 5 A schematic diagram of a state in which a casting correction device provided in an embodiment of the present invention performs interference correction on all sides of a casting product;

[0026] Figure 6 A schematic diagram of a state in which the casting correction device provided by an embodiment of the present invention performs interference correction on the middle part of a casting product;

[0027] Figure 7 A schematic structural diagram of a height adjustment mechanism of a casting correction device provided in an embodiment of the present invention.

[0028] Icons: casting correction equipment-100; upper chuck-110; lower chuck-120; height adjustment mechanism-130; base-131; pressing block-132; adjusting plate-133; connecting column-134; elastic member-135; casting in correction state-210; casting in deformation state-220; casting in interference state-230. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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 similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] Figure 1 The figure is a schematic diagram of the cooling deformation process of thin plate casting products, in which the upper part is the state of casting completion, and the lower part is the state after cooling. During the cooling process, the outer periphery and the middle part of the thin plate casting products have different cooling and shrinking amplitudes, which will cause the casting products to deform. Taking the casting product length of 120 mm as an example, the deformation amplitude of each part can reach 2 mm to 10 mm, while the deformation amplitude required by the process does not exceed 1 mm, and the deformation amplitude exceeds 100%.

[0037] Here, thin plate casting products generally refer to casting products with a wall thickness of 5 mm to 8 mm and a length and width greater than 800 mm.

[0038] In the prior art, manual calibration is mainly performed by workers. Taking a casting product with a length of 120 mm, the calibration time of a single product is more than 2 hours. The manual calibration mainly relies on hammering to target product deformation, and the noise generated exceeds 120 mm, 120 mm, 120 mm, 120 mm, 120 mm, and 120 mm decibels. In addition, since the deformation depends on manual observation, the calibration result is unstable, and it cannot be guaranteed that each casting product can be reliably calibrated, and the quality of the product after calibration cannot be guaranteed.

[0039] Embodiment 1 of the present invention provides a casting correction method, comprising:

[0040] Conduct simulation analysis on the three-dimensional model of the casting to obtain correction parameters;

[0041] Heat treatment is performed on the casting products to bring them into the yield stage;

[0042] Based on the correction parameters, correction equipment is used to perform interference correction on the casting products.

[0043] In this embodiment, the correction parameters are obtained by simulating and analyzing the three-dimensional model of the casting, so as to ensure the stability of the correction result; the casting product is heat treated to put the casting product in the yield stage, and the casting is thermally corrected; based on the correction parameters, the casting product is corrected for interference fit using correction equipment. After the correction is completed, the casting product will undergo springback deformation, so that the casting product finally meets the design requirements, thereby completing the correction of the casting product.

[0044] Taking aluminum alloy castings as an example, thermal correction of castings means that the yield strength of aluminum alloy castings is greatly reduced when the temperature rises, that is, correction is carried out when the yield strength of aluminum alloy is at its lowest state, and a certain pressure is applied to change the shape of the metal by taking advantage of the good plasticity of metal at high temperature. The yield strength of different aluminum alloys changes with temperature in different trends, and when the temperature is greater than 500℃, the yield strength of aluminum alloy can drop to 50N / mm 2 Below, or even lower.

[0045] The material of the casting product that can be thermally corrected is not limited to aluminum alloy, which is used here only as an example and does not constitute a limitation on the casting material.

[0046] In an optional embodiment, a simulation analysis is performed on the three-dimensional model of the casting using stress analysis software, including inputting material parameters of the three-dimensional model of the casting into the stress analysis software.

[0047] When different casting materials are used for casting products, the material properties of the casting products will also change, which will affect the correction effect of the correction equipment on the casting products. The correction equipment corrects the casting products based on the correction parameters of the simulation analysis. Therefore, the material parameters of the materials used in the casting products are input into the casting 3D model. The stress analysis software can output more accurate correction parameters to ensure the final correction effect.

[0048] In an optional embodiment, the calibration device includes at least two sets of clamps, each set of clamps includes an upper clamp 110 and a lower clamp 120 that are arranged opposite to each other.

[0049] like Figure 1 As shown, the deformation of thin plate casting products is mainly longitudinal deformation. Therefore, the correction equipment uses a fixture with an upper clamp 110 and a lower clamp 120 to correct the casting products, which is more convenient for targeted correction.

[0050] like Figure 2 As shown, an upper chuck 110 and a lower chuck 120 in a set of clamps perform local correction on the casting product. The direction of the arrow is the direction of pressure applied by the correction device. At least one of the upper chuck 110 and the lower chuck 120 is driven by the correction device. One of them can be driven by the correction device and the other can be stationary. Alternatively, the upper chuck 110 and the lower chuck 120 can be driven by the correction device at the same time.

[0051] The positions of the multiple sets of clamps can be arranged according to the shape design of the casting product, and can also be arranged at appropriate positions according to the deformation trend of the casting product.

[0052] In an optional embodiment, a simulation analysis is performed on the three-dimensional model of the casting using stress analysis software, including inputting the horizontal position of each set of clamps into the stress analysis software.

[0053] In an optional embodiment, a stress analysis software is used to perform simulation analysis on the three-dimensional model of the casting, including inputting the longitudinal position of the upper clamp 110 and the longitudinal position of the lower clamp 120 in each set of clamps into the stress analysis software.

[0054] In the stress analysis software, the position of the force applied to the three-dimensional model of the casting is the horizontal position of each set of clamps and the longitudinal position of the upper clamp 110 and the longitudinal position of the lower clamp 120 in each set of clamps. The stress analysis software applies pressure to the three-dimensional model of the product based on these positions to obtain correction parameters.

[0055] In an optional embodiment, both the upper chuck 110 and the lower chuck 120 include a height adjustment mechanism 130 , and the correction device adjusts the height adjustment mechanism 130 on the upper chuck 110 and the lower chuck 120 based on the correction parameters before performing interference correction on the casting product.

[0056] For different casting products, including casting products with different shapes and casting products made of different materials, the correction parameters provided by the simulation analysis are also different. The upper chuck 110 and the lower chuck 120 include a height adjustment mechanism 130, which can easily adjust the longitudinal position of the upper chuck 110 and the lower chuck 120, and the correction of different casting products can be completed without changing the fixture.

[0057] In an optional embodiment, the correction parameters include the pressing force of the correction device and the deformation amount of the casting three-dimensional model.

[0058] Different products require different pressing forces, and the correction device can also provide different pressing forces. Therefore, using the pressing force of the correction device as an adjustable correction parameter can make the correction method provided in this embodiment have a wider range of application scenarios.

[0059] During simulation analysis, after applying a clamping force to the three-dimensional model of the casting, the deformation that can be produced by each set of fixtures can be obtained based on the clamping force and the shape and material parameters of the three-dimensional model of the casting. This deformation is the interference amount when the correction equipment performs interference correction on the casting product.

[0060] The calibration device can adapt to the deformation amount in the calibration parameter by adjusting the fixture. For example, the deformation amount in different calibration parameters can be matched by replacing the fixture. Alternatively, the upper clamp 110 and the lower clamp 120 with the height adjustment mechanism 130 in the above embodiment can be used to change the longitudinal position of the upper clamp 110 and the lower clamp 120 by adjusting the height adjustment mechanism 130, so as to match the deformation amount in different calibration parameters.

[0061] In an optional embodiment, when performing interference correction on the casting, interference correction is performed on the periphery of the casting first, and then interference correction is performed on the middle of the casting.

[0062] When the deformation of the casting is irregular or too large, interference correction can be performed on the four sides of the casting first, so that the casting product becomes a more regular and uniform state, and then interference correction can be performed on the middle of the casting to complete the final correction.

[0063] The state of interference correction around the casting is as follows Figure 5 As shown in the figure, the interference correction of the middle part of the casting is as follows Figure 6 shown.

[0064] During the adjustment process of the casting correction device 100 from correcting the four sides of the casting product to correcting the middle of the casting, the longitudinal position of the upper chuck 110 and the lower chuck 120 can be adjusted by the height adjustment mechanism 130 on the upper chuck 110 and the lower chuck 120, thereby completing the correction of different parts of the casting.

[0065] Embodiment 2 of the present invention provides a casting correction device 100 for implementing the casting correction method according to any one of the aforementioned embodiments, including at least two groups of clamps, each group of clamps includes an upper clamp 110 and a lower clamp 120 arranged opposite to each other, the upper clamp 110 and the lower clamp 120 both include a height adjustment mechanism 130, the height adjustment mechanism 130 includes a base 131 and a pressure block 132, the base 131 and the pressure block 132 are movably connected, and at least one adjustment plate 133 may be provided between the base 131 and the pressure block 132.

[0066] The height adjustment mechanism 130 is as follows Figure 7 As shown, the base 131 is used to be connected and installed with the main body or base of the upper clamp 110 or the lower clamp 120, the pressing block 132 is used to contact the casting product, and an adjusting piece 133 is provided between the pressing block 132 and the base 131. The relative position of the pressing block 132 and the base 131 is adjusted by adding or reducing the adjusting piece 133, so as to achieve the adjustment of the longitudinal position of the upper clamp 110 and the lower clamp 120. The adjusting piece 133 can be reduced to zero at least, that is, there is no adjusting piece 133 between the base 131 and the pressing block 132, so that the size of the pressing block 132 and the base 131 is minimized. By adding or reducing the adjusting piece 133 to adjust the relative position of the pressing block 132 and the base 131, it can be adjusted quickly in actual application, which is convenient and efficient.

[0067] In an optional embodiment, a connecting column 134 and an elastic member 135 are provided between the base 131 and the pressing block 132, and a notch is provided in the adjusting piece 133, and the notch of the adjusting piece 133 can be inserted into the connecting column 134. The elastic member 135 is provided between the base 131 and the pressing block 132, so that both have the function of automatic reset and can automatically clamp the adjusting piece 133 in the middle. The notch of the adjusting piece 133 can be inserted into the connecting column 134, which is convenient for installation and removal. The elastic member 135 can be a spring, such as a tension spring or a compression spring.

[0068] like Figure 2 As shown in the schematic diagram of the casting deformation process state, the casting product will obtain a deformed state casting 220 after cooling after casting is completed. At this time, the upper chuck 110 and the lower chuck 120 in the casting correction equipment 100 perform longitudinal interference correction on the deformed state casting 220 to obtain an interference state casting 230. The interference state casting 230 will rebound and deform during natural cooling, thereby obtaining a corrected state casting 210.

[0069] like Figure 3 As shown, before the casting correction device 100 is corrected, the deformed casting 220 is placed on the lower clamp 120, and the middle part of the deformed casting 220 has an upward convex deformation.

[0070] like Figure 4 As shown, when the casting correction device 100 is being corrected, the casting product is pressed by the clamp and deformed into an interference state, and the middle part of the casting 230 in the interference state becomes a convex shape.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A casting correction method, characterized in that: include: Conduct simulation analysis on the three-dimensional model of the casting to obtain correction parameters; Heat treatment is performed on the casting products to bring them into the yield stage; Based on the correction parameters, correction equipment is used to perform interference correction on the casting product.

2. The casting correction method according to claim 1, characterized in that: The three-dimensional model of the casting is simulated and analyzed by using stress analysis software, including inputting material parameters of the three-dimensional model of the casting into the stress analysis software.

3. The casting correction method according to claim 1, characterized in that: The correction device comprises at least two groups of clamps, each group of the clamps comprises an upper clamp (110) and a lower clamp (120) which are arranged opposite to each other.

4. The casting correction method according to claim 3, characterized in that: The three-dimensional model of the casting is simulated and analyzed using stress analysis software, including inputting the horizontal position of each set of fixtures into the stress analysis software.

5. The casting correction method according to claim 3, characterized in that: The three-dimensional model of the casting is simulated and analyzed using stress analysis software, including inputting the longitudinal position of the upper clamp (110) and the longitudinal position of the lower clamp (120) in each set of clamps into the stress analysis software.

6. The casting correction method according to claim 3, characterized in that: The upper chuck (110) and the lower chuck (120) both include a height adjustment mechanism (130), and the correction device adjusts the height adjustment mechanism (130) on the upper chuck (110) and the lower chuck (120) based on the correction parameters before performing interference correction on the casting product.

7. The casting correction method according to claim 1, characterized in that: The correction parameters include the clamping force of the correction device and the deformation of the three-dimensional model of the casting.

8. The casting correction method according to claim 1, characterized in that: When performing interference correction on a casting, first perform interference correction on the four sides of the casting and then perform interference correction on the middle of the casting.

9. A casting correction device, used for implementing the casting correction method according to any one of claims 1 to 8, characterized in that: The invention comprises at least two groups of clamps, each group of the clamps comprises an upper clamp (110) and a lower clamp (120) which are arranged opposite to each other, the upper clamp (110) and the lower clamp (120) both comprise a height adjustment mechanism (130), the height adjustment mechanism (130) comprises a base (131) and a pressing block (132), the base (131) and the pressing block (132) are movably connected, and at least one adjustment sheet (133) may be provided between the base (131) and the pressing block (132).

10. The casting correction device according to claim 9, characterized in that: A connecting column (134) and an elastic member (135) are provided between the base (131) and the pressing block (132); the adjusting sheet (133) is provided with a notch, and the notch of the adjusting sheet (133) can be inserted into the connecting column (134).

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