A heat treatment and fixing method for flat frame type aluminum alloy castings

Abstract

The present invention relates to a method for heat treatment and fixing of a flat frame type aluminum alloy casting, comprising a casting to be heat treated, a support base, an anchoring device and a sliding restraint device, and the fixing steps are as follows: Step 1: Place the casting to be heat treated flat on the support base; Step 2: Rigidly connect the casting to be heat treated with the support base through an anchoring device, and the anchoring point is one or multiple adjacent points on the casting; Step 3: Set a number of sliding restraint devices at the remaining positions on the support base except the anchoring point, when the casting expands and contracts, the anchoring point or area of ​​the casting remains relatively still with the support base, and the remaining parts can move freely along the support plane direction, while other directions will be restrained by the sliding restraint device. This method for heat treatment and fixing of a flat frame type aluminum alloy casting allows the casting to maintain a small resistance for thermal expansion and contraction, and at the same time, due to the restriction in the direction perpendicular to the support surface, it is ensured that the flatness of the final product in the direction of the support surface is effectively controlled.

Description

Technical Field

[0001] The invention relates to the field of heat treatment and fixing of aluminum alloy castings, and in particular to a heat treatment and fixing method of a flat frame type aluminum alloy casting. Background Art

[0002] In the field of heat treatment production of flat frame aluminum alloy castings, deformation of the product after heat treatment is often encountered. In order to reduce such deformation, heat treatment tooling is usually used. Traditional heat treatment tooling generally only plays a role of leveling and supporting, or completely fixes the product and the heat treatment tooling as a whole. The former tooling cannot effectively reduce the deformation after heat treatment, and the latter tooling has inconsistent thermal expansion and contraction coefficients between the aluminum alloy casting and the tooling, and forced multi-point fixation leads to excessive internal stress in the product, which eventually causes product deformation. Therefore, the heat treatment deformation of flat frame aluminum alloy castings is a technical problem that needs to be solved urgently. In view of this, we propose a heat treatment fixation method for flat frame aluminum alloy castings. Summary of the invention

[0003] The purpose of the present invention is to provide a method for heat treatment and fixing of a flat frame type aluminum alloy casting to solve the problems raised in the above background technology. To achieve the above purpose, the present invention provides the following technical solutions: a method for heat treatment and fixing of a flat frame type aluminum alloy casting, comprising a casting to be heat treated, a supporting base, an anchoring device and a sliding restraining device, and the fixing steps are as follows:

[0004] Step 1: Place the casting to be heat treated flat on the support base;

[0005] Step 2: rigidly connect the casting to be heat treated to the support base through an anchoring device, where the anchoring point is one or multiple adjacent points on the casting;

[0006] Step three: Set up several sliding restraint devices at other positions on the support base except the anchor points. When the casting expands or contracts due to heat or cold, the anchor points or areas of the casting remain relatively still with the support base, and the remaining parts can move freely along the support plane, while other directions will be restrained by the sliding restraint devices.

[0007] Preferably, the support base is made of heat-resistant steel and has a frame-type structure.

[0008] Preferably, at least one anchoring device is provided on the support base.

[0009] Preferably, the slip restraining device is provided with a gap adjustment mechanism, which can adjust the gap between the restraining plate and the workpiece, thereby achieving a limiting restraint effect on the height direction of the product.

[0010] Preferably, the support base has several support points or surfaces in contact with the casting, and these points or surfaces may be rigid support surfaces or adjustable flexible support surfaces, and the support surface may adjust the gap between the support points and the supported casting through a mechanism.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] In the present invention, since only one point or a small area of ​​the casting is fixed to the support base, and the remaining points are restricted by the sliding constraint device to limit the movement of the casting in the direction perpendicular to the support surface, and there is no restriction on the movement along the support plane direction, during the heating and cooling process of heat treatment, the casting can maintain a small resistance to thermal expansion and contraction. At the same time, due to the restriction in the direction perpendicular to the support surface, its deformation will be controlled within a certain range, thereby ensuring that the flatness of the final product in the direction of the support surface is effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure in which the casting to be heat treated is fixed on the supporting base in the present invention;

[0014] Figure 2 It is a schematic diagram of the supporting base structure in the present invention;

[0015] Figure 3 It is a schematic diagram of the structure of the anchoring device in the present invention;

[0016] Figure 4 It is a schematic diagram of the structure of the slip restraint device in the present invention.

[0017] In the figure: 1. casting to be heat treated; 2. supporting base; 3. anchoring device; 4. sliding restraining device; 5. gap adjustment mechanism. DETAILED DESCRIPTION

[0018] 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 technical personnel in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 4 The present invention provides a technical solution: a method for heat treatment and fixing of a flat frame type aluminum alloy casting, comprising a casting to be heat treated 1, a support base 2, an anchoring device 3 and a sliding restraining device 4, and the fixing steps are as follows:

[0020] Step 1: Place the casting 1 to be heat treated flat on the support base 2. There are several supporting points or surfaces on the support base 2 that are in contact with the casting. These points or surfaces can be rigid supporting surfaces or adjustable flexible supporting surfaces. The support surface can adjust the gap between the supporting points and the supported casting through a mechanism. The support base 2 is made of heat-resistant steel and has a frame structure. At least one anchoring device 3 is provided on the support base 2.

[0021] Step 2: rigidly connect the casting 1 to be heat treated to the support base 2 through the anchoring device 3, where the anchoring point is one or multiple adjacent points on the casting;

[0022] Step three: several sliding restraint devices 4 are set at the remaining positions on the support base 2 except the anchoring points. When the casting expands or contracts due to heat, the anchoring points or areas of the casting remain relatively still with the support base 2, and the remaining parts can move freely along the support plane direction, while other directions will be restrained by the sliding restraint devices 4. The sliding restraint devices 4 are provided with gap adjustment mechanisms 5, which can adjust the gap between the restraining plate and the workpiece, thereby realizing the limiting restraint effect on the height direction of the product.

[0023] In the present invention, since only one point or a small area of ​​the casting is fixed to the support base, and the remaining points are restricted by the sliding constraint device 4 to limit the movement of the casting in the direction perpendicular to the support surface, and there is no restriction on the movement along the support plane direction, during the heating and cooling process of the heat treatment, the casting can maintain a small resistance to thermal expansion and contraction. At the same time, due to the restriction in the direction perpendicular to the support surface, its deformation will be controlled within a certain range, thereby ensuring that the flatness of the final product in the direction of the support surface is effectively controlled.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and 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 orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A method for heat treatment and fixing of flat frame type aluminum alloy castings, characterized in that: The invention comprises a casting to be heat treated (1), a supporting base (2), an anchoring device (3) and a sliding restraining device (4), and the fixing steps are as follows: Step 1: Place the casting (1) to be heat treated flat on a support base (2); Step 2: rigidly connecting the casting to be heat treated (1) to the support base (2) through an anchoring device (3), wherein the anchoring point is one or multiple adjacent points on the casting; Step three: a plurality of sliding restraint devices (4) are arranged at positions other than the anchoring points on the support base (2). When the casting expands or contracts due to heat or cold, the anchoring points or regions of the casting remain relatively still with the support base (2), and the remaining parts can move freely along the support plane, while other directions will be restrained by the sliding restraint devices (4); The slip restraining device (4) is provided with a gap adjustment mechanism (5); The support base (2) has a plurality of support surfaces in contact with the casting, and these support surfaces are rigid support surfaces or adjustable flexible support surfaces, and the gap between the support surface and the supported casting is adjusted by a mechanism.

2. The method for heat treatment and fixing of a flat frame type aluminum alloy casting according to claim 1, characterized in that: The support base (2) is made of heat-resistant steel and has a frame-type structure.

3. The method for heat treatment and fixing of a flat frame type aluminum alloy casting according to claim 1, characterized in that: At least one anchoring device (3) is provided on the support base (2).

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