Cylindrical aluminum alloy casting heat treatment deformation control tooling

Abstract

The utility model belongs to foundry technology field especially relates to control tubular aluminium alloy casting heat treatment deformation frock, wherein one kind control tubular aluminium alloy casting heat treatment deformation frock, include: tubular frame, a plurality of threaded holes are set up on it and one threaded hole corresponds to one adjusting bolt, the end of adjusting bolt sets up outward, and after the tubular aluminium alloy casting is set up the outside of tubular frame, and through the extension length of adjusting bolt, to make the end of adjusting bolt and the inner wall of tubular aluminium alloy casting be in abutment. Through the cooperation of tubular frame and adjusting bolt, realize the accurate constraint from the inside of cylindrical aluminium alloy casting, the deformation control frock of adaptation different height and axial position, improve the dimensional stability of aluminium alloy tubular aluminium alloy casting, reduce the scrap rate.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology, and in particular relates to a tooling for controlling the deformation of cylindrical aluminum alloy castings during heat treatment. Background Technology

[0002] In the manufacturing process of aluminum alloy cylindrical castings, high dimensional accuracy control is required. During heat treatment solution quenching, especially during solution quenching and cooling, the casting will generate significant thermal and structural stresses due to rapid temperature changes. If these stresses cannot be effectively released or controlled, they can easily lead to disordered deformation of the cylindrical castings, specifically manifested as ellipticization, uneven radial shrinkage, and axial bending.

[0003] In related technologies, the control methods for deformation of cylindrical aluminum alloy castings during heat treatment are mostly focused on heat treatment process parameters (such as solution temperature, holding time, quenching medium flow rate, etc.) or external clamps to constrain the surface of the casting. However, the former has limited effect on deformation control and is difficult to adapt to the complex cylindrical aluminum alloy castings. The latter causes the casting to be hindered during heating expansion due to clamping force and causes surface damage, and cannot solve the technical problem of radial shrinkage imbalance caused by the casting during water quenching.

[0004] Therefore, it is necessary to develop a tooling for controlling the deformation of cylindrical aluminum alloy castings during heat treatment.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Utility Model Content

[0006] This disclosure provides at least one tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings.

[0007] This disclosure provides a tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings, including: A cylindrical frame with several threaded holes, each threaded hole corresponding to an adjusting bolt; The end of the adjusting bolt is set outward, and after the cylindrical aluminum alloy casting is sleeved on the outside of the cylindrical frame, the extension length of the adjusting bolt is adjusted so that the end of the adjusting bolt abuts against the inner wall of the cylindrical aluminum alloy casting.

[0008] In one alternative embodiment, the cylindrical frame includes: A ring, horizontally positioned at the top of the tooling; The base plate is set parallel to the annular ring. Several vertical plates are vertically connected to the annular ring and the base plate, and are evenly distributed along the circumference of the annular ring; Multi-layered horizontal panels, which are horizontally fixed between adjacent vertical panels; The adjusting bolts are installed through the vertical plate and the horizontal plate; The ends of each adjusting bolt abut against the inner wall of the cylindrical aluminum alloy casting to form a radial constraint channel.

[0009] In one optional embodiment, a plurality of side lugs are evenly distributed around the edge of the base plate, and each side lug is threaded with an external positioning bolt, the end of which abuts against the outer wall of the cylindrical aluminum alloy casting.

[0010] In one alternative implementation, the number of vertical panels is eight, which are evenly distributed around the perimeter to form a regular octagonal frame.

[0011] In one alternative embodiment, the horizontal plate is arranged in 5 layers along the vertical direction, with 8 pieces in each layer and welded perpendicularly to the vertical plate.

[0012] In one optional embodiment, the edge region of the base plate is provided with an annular positioning boss, the outer diameter of which is larger than the outer diameter of the cylindrical aluminum alloy casting.

[0013] In one optional embodiment, the end of the adjusting bolt is provided with a heat-resistant copper alloy gasket, and the contact surface of the gasket is an arc-shaped surface with a radius matching the inner wall of the casting.

[0014] In one alternative embodiment, lifting lugs are welded to the top of the annular ring, with the lugs symmetrically distributed and their centers of gravity coinciding with the tooling axis.

[0015] In one optional embodiment, the side ear plates are four pieces, evenly distributed around the edge of the base plate and provided with arc-shaped clearance grooves.

[0016] The beneficial effects of this utility model are that it provides a tooling for controlling the deformation of cylindrical aluminum alloy castings during heat treatment. Through the cooperation of a barrel-shaped frame and several adjusting bolts, it achieves precise constraint from the inside of the cylindrical aluminum alloy casting and adapts to deformation control at different heights and axial positions. By controlling the contact state between the adjusting bolts and the casting, it guides the shrinkage direction and suppresses disordered deformation during heat treatment, thereby improving the dimensional stability of the cylindrical aluminum alloy casting and reducing the scrap rate.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A perspective view of a cylindrical aluminum alloy casting fitted outside a heat treatment deformation fixture, as provided in an embodiment of this disclosure; Figure 2 A perspective view of the tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings provided in the embodiments of this disclosure; Figure 3 A top view of the tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings provided in an embodiment of this disclosure; Figure 4 This is a cross-sectional perspective view of the tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings provided in an embodiment of this disclosure.

[0021] In the picture: 1. Ring; 10. Lifting lug; 2. Base plate; 21. Positioning boss; 3. Vertical plate; 4. Horizontal plate; 5. Adjusting bolt; 51. External positioning bolt; 6. Side ear plate; 7. Cylindrical aluminum alloy casting; 8. Cylindrical frame. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0024] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0025] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise expressly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0026] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0027] Research has revealed that in the manufacturing process of aluminum alloy cylindrical castings, where high dimensional accuracy control is crucial, significant thermal and structural stresses arise during the solution quenching and heat treatment process, particularly during solution-cooled quenching. If these stresses are not effectively released or controlled, they can easily lead to disordered deformation of the cylindrical castings, manifesting as ellipticization, uneven radial shrinkage, and axial bending.

[0028] In related technologies, the control methods for deformation of cylindrical aluminum alloy castings during heat treatment are mostly focused on heat treatment process parameters (such as solution temperature, holding time, quenching medium flow rate, etc.) or external clamps to constrain the surface of the casting. However, the former has limited effect on deformation control and is difficult to adapt to the complex cylindrical aluminum alloy castings. The latter causes the casting to be hindered during heating expansion due to clamping force and causes surface damage, and cannot solve the technical problem of radial shrinkage imbalance caused by the casting during water quenching.

[0029] Therefore, it is necessary to develop a tooling for controlling the deformation of cylindrical aluminum alloy castings during heat treatment.

[0030] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] like Figures 1 to 4 As shown, at least one embodiment provides a tooling for controlling the heat treatment deformation of a cylindrical aluminum alloy casting, including: a cylindrical frame 8 with a plurality of threaded holes, each threaded hole corresponding to an adjusting bolt 5; the end of the adjusting bolt 5 is arranged outward, and after the cylindrical aluminum alloy casting 7 is sleeved on the outside of the cylindrical frame 8, the end of the adjusting bolt 5 is abutted against the inner wall of the cylindrical aluminum alloy casting 7 by adjusting the extension length of the adjusting bolt 5.

[0034] Reference Appendix Figure 2The cylindrical frame 8 includes: an annular ring 1, horizontally positioned on top of the fixture; welded from high-strength steel, with two symmetrically welded lifting lugs 10 on the top of the annular ring 1. The positions of the lifting lugs 10 are mechanically calculated to ensure that the center of gravity coincides with the axis of the fixture, preventing tilting during lifting. The lifting lugs 10 have a 50mm diameter hole, compatible with standard crane hooks, facilitating transfer within the heat treatment furnace. A base plate 2, parallel to the annular ring 1, is made of high-strength steel, wear-resistant and heat-resistant. The edge of the base plate 2 has an annular positioning boss 21, the outer diameter of which is larger than the maximum outer diameter of the cylindrical aluminum alloy casting 7, forming a mechanical stop to prevent horizontal displacement of the casting. The boss height is 10mm, simplifying the centering operation of the casting. Several vertical plates 3, eight in total, vertically connect the annular ring 1 and the base plate 2, and are evenly distributed along the circumference of the annular ring 1 to form a regular octagonal frame. The height of the vertical plates 3 matches the axial length of the cylindrical aluminum alloy casting 7. The spacing between adjacent vertical plates 3 is uniform to ensure the dispersion of thermal expansion stress during heat treatment. Multi-layer horizontal plates 4 are horizontally fixed between adjacent vertical plates 3; the horizontal plates 4 are arranged in 5 layers along the vertical direction, with 8 plates in each layer, for a total of 40 plates, which are welded perpendicularly to the vertical plates 3 to form a grid-like support system to enhance axial bending stiffness.

[0035] Please refer to the appendix again. Figure 2 Several adjusting bolts 5 are installed through the vertical plate 3 and the horizontal plate 4, pointing towards the center of the tooling. Each bolt has a heat-resistant copper alloy washer at its end, with an arc-shaped contact surface matching the curvature of the inner wall of the casting. Several side ear plates 6 are evenly distributed around the edge of the base plate 2. Each side ear plate 6 has a threaded external positioning bolt 51, the end of which abuts against the outer wall of the cylindrical aluminum alloy casting 7. There are four side ear plates 6 in total, with the external positioning bolt 51 adjustable within a range of ±20mm to accommodate different casting diameters. The inner wall of each side ear plate 6 has an arc-shaped clearance groove to facilitate the adjustment bolts 5 abutting against the outer wall of the cylindrical aluminum alloy casting 7. The material is the same as the base plate 2, and the height is 100mm, providing temporary positioning functionality. The ends of each adjusting bolt 5 abut against the inner wall of the cylindrical aluminum alloy casting 7 to form a radial constraint channel.

[0036] The working principle is as follows: Pre-treatment adjustment: Rotate the 40 inner constraint bolts 52 on the vertical plate 3 and the horizontal plate 4 toward the center, and rotate the 4 outer positioning bolts 51 on the side ear plate 6 outward, so that the bolt ends are kept 5-10mm away from the inner wall of the casting.

[0037] Casting placement: Place the cylindrical aluminum alloy casting 7 on the bottom plate 2 and adjust the position of the cylindrical aluminum alloy casting 7 to the tooling center (tolerance ±2mm).

[0038] External positioning: Adjust the four external positioning bolts 51 of the side ear plate 6 inward to contact the outer wall of the casting (temporary constraint) to prevent deviation in subsequent operations.

[0039] Internal constraint: Adjust the 40 internal constraint bolts 52 on the vertical plate 3 and the horizontal plate 4 to ensure that the heat-resistant copper alloy gaskets are in uniform contact with the inner wall of the casting. Use a torque wrench simultaneously to ensure that the torque of each bolt is consistent and to eliminate the risk of ovality.

[0040] Remove external positioning: Loosen the four external positioning bolts 51 of the side ear plate 6, and the casting is only constrained internally.

[0041] Heat treatment process: The tooling is placed in the furnace along with the casting for solution treatment. During water quenching, bolts guide the casting to shrink radially in an orderly manner.

[0042] Post-treatment: After heat treatment, loosen all bolts, remove the casting, and check the dimensional tolerances.

[0043] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0045] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings, characterized in that, include: A cylindrical frame (8) has several threaded holes, with each threaded hole corresponding to an adjusting bolt (5). The end of the adjusting bolt (5) is set outward, and after the cylindrical aluminum alloy casting (7) is sleeved on the outside of the cylindrical frame (8), the end of the adjusting bolt (5) is made to abut against the inner wall of the cylindrical aluminum alloy casting (7) by adjusting the extension length of the adjusting bolt (5).

2. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 1, characterized in that, The cylindrical frame (8) includes: An annular ring (1) is horizontally positioned on top of the tooling. The base plate (2) is set parallel to the annular ring (1); Several vertical plates (3) are vertically connected to the annular ring (1) and the base plate (2), and are evenly distributed along the circumference of the annular ring (1); Multi-layer horizontal plates (4) are horizontally fixed between adjacent vertical plates (3); The adjusting bolt (5) is installed through the vertical plate (3) and the horizontal plate (4); The ends of each adjusting bolt (5) abut against the inner wall of the cylindrical aluminum alloy casting (7) to form a radial constraint channel.

3. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 2, characterized in that, The bottom plate (2) has several side ear plates (6) evenly distributed around its periphery. Each side ear plate (6) is threaded with an external positioning bolt (51), the end of which abuts against the outer wall of the cylindrical aluminum alloy casting (7).

4. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 2, characterized in that, The number of vertical plates (3) is 8, which are evenly distributed around the perimeter to form a regular octagonal frame.

5. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 2, characterized in that, The horizontal plate (4) is arranged in 5 layers along the vertical direction, with 8 pieces in each layer and welded perpendicularly to the vertical plate (3).

6. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 2, characterized in that, The edge area of ​​the base plate (2) is provided with an annular positioning boss (21), the outer diameter of which is larger than the outer diameter of the cylindrical aluminum alloy casting (7).

7. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 2, characterized in that, The end of the adjusting bolt (5) is provided with a heat-resistant copper alloy gasket, and the contact surface of the gasket is an arc-shaped surface with a radius matching the inner wall of the casting.

8. The tooling for controlling the deformation of cylindrical aluminum alloy castings during heat treatment as described in claim 2, characterized in that, The top of the annular ring (1) is welded with lifting lugs (10), which are symmetrically distributed and whose center of gravity coincides with the axis of the tooling.

9. The tooling for controlling the heat treatment deformation of cylindrical aluminum alloy castings as described in claim 3, characterized in that, The side ear plates (6) consist of 4 pieces, which are evenly distributed around the edge of the bottom plate (2) and are provided with arc-shaped clearance grooves.

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