Square-round dual-purpose casting sand box

Abstract

The utility model discloses a square and round dual -purpose casting sand box belongs to casting sand box technical field. It includes square sand box and round assembly, the round assembly is cylindrical structure, the round assembly is set in the cavity of square sand box vertically, and two ports of round assembly are flush with two ports of square sand box, and the square sand box with the round assembly between through connecting piece detachably fixed connection is an organic whole. The utility model can satisfy the change of various casting shape and size range, can improve casting quality, can save the manufacturing and production cost of sand box significantly, and reduce the total reserve capacity and storage area of sand box.

Description

Technical Field

[0001] This utility model relates to a square and round casting sand box, belonging to the technical field of casting sand box. Background Technology

[0002] Sand boxes play a crucial role in the casting process. Their main function is to place molding sand inside, shaping it into the required form of the casting, creating a mold, and then pouring the sand into the mold to produce the desired casting product. The casting and solidification processes occur within the mold, significantly impacting the quality of the casting. Currently, sand boxes are mostly integral structures, primarily square or rectangular in shape.

[0003] The characteristics of casting molds and dies for steel pipe and cold-formed steel production rolls are: a wide variety of specifications and small quantities of each specification. For example, for molds and dies for welded pipe and cold-formed steel production rolls, in most cases only 1 or 2 pieces are needed per drawing, and the weight varies greatly: small pieces weigh only 4-5 kg ​​each, while large pieces weigh over 5 tons each. Therefore, it is necessary to prepare sand boxes of many specifications and varieties. However, manufacturing a large number of sand boxes not only occupies a lot of capital, but also results in waste due to the low usage frequency of some specifications and varieties of sand boxes. At the same time, a large warehouse is also required for storage. In order to reduce the investment in sand boxes, sometimes large sand boxes are used to cast small castings, or square sand boxes are used to cast ring castings. However, when using large sand boxes to cast small castings, not only is molding sand wasted, but the large thickness of molding sand also affects the solidification speed of the casting, thus affecting the quality of the casting. When using square sand boxes to cast ring castings, the uneven thickness of molding sand in the sand mold can easily lead to uneven casting quality. For example, when using square sand boxes to cast ring steel pipe reducing rolls, the surface hardness difference can reach 5-6 HRC. Utility Model Content

[0004] To address the aforementioned deficiencies in the existing technology, this utility model provides a square and round dual-purpose casting sand box that has a simple structure, reduces sand box input, and can meet the casting needs of various castings.

[0005] This utility model is achieved through the following technical solution: a square and round casting sand box, characterized in that: it includes a square sand box and a circular component, the circular component is a cylindrical structure, the circular component is vertically arranged in the cavity of the square sand box, and the two ends of the circular component are flush with the two ends of the square sand box, the square sand box and the circular component are detachably and fixedly connected as a whole by a connector.

[0006] In this invention, a circular component is installed inside a square sand box. This circular component is detachable and can be installed or removed according to casting requirements, thus giving the sand box both the functions of a square sand box and the added functionality of a circular sand box. By incorporating the circular component, ring-shaped castings can be cast within it, thereby improving the quality of the ring-shaped castings.

[0007] Furthermore, to facilitate the installation and disassembly of the circular component and the square sand box, bolt holes are respectively provided on the four side walls of the square sand box and the side walls of the circular component. The square sand box and the circular component are connected as one unit by bolts and nuts.

[0008] Furthermore, the circular component includes a cylindrical component body, with annular end plates coaxially fixed to both ends of the component body. The inner diameter of the end plates matches the inner diameter of the component body, and the outer diameter of the end plates matches the inner wall of the square sand box. When the circular component is placed inside the square sand box, the end plates at both ends of the component body ensure the stability of the circular component and also limit its movement, facilitating its installation.

[0009] Furthermore, to improve the structural strength of the circular component, multiple reinforcing ribs are arranged at intervals on the outer wall of the component body, and the reinforcing ribs are fixedly connected to the outer wall of the component body and the end plates at both ends of the component body.

[0010] Furthermore, bolt holes are respectively provided on the four side walls of the square sand box and the side wall of the circular component, and the reinforcing ribs are provided at the bolt holes on the side wall of the circular component. The square sand box and the circular component are connected as one unit by bolts and nuts.

[0011] The beneficial effects of this utility model are as follows: The utility model has a reasonable structural design. By setting a circular component inside a square sand box, the circular component is detachable and can be installed or removed according to casting requirements. This allows the sand box to function as both a square and a circular sand box, and the addition of the circular component improves the quality of ring-shaped castings. The inner hole of the circular component can be set to different sizes as needed, forming circular sand boxes of different sizes after combination with the square sand box, which can meet the needs of different castings. The circular component and the square sand box are connected by bolts and nuts, making installation and disassembly simple and convenient, and enabling rapid assembly of the sand box. This utility model can meet the requirements of various casting shapes and sizes, significantly saving the manufacturing and production costs of sand boxes, and reducing the total storage volume and area of ​​sand boxes. Especially when using this utility model for the production of ring-shaped castings, compared with using a square sand box, it can significantly save molding sand, accelerate the solidification speed, effectively ensure casting quality, and greatly reduce production costs. This invention can be modified based on the existing square sand box, and the sand box modification cost is low, which can greatly reduce the manufacturing cost. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the square sand box in this utility model;

[0014] Figure 3 This is a schematic diagram of the circular component in this utility model;

[0015] In the diagram, 1 is a square sandbox, 2 is a circular component, and 3 is a connector.

[0016] 1-1. Bolt holes on the square sand box;

[0017] 2-1. Component body; 2-2. End plate; 2-3. Reinforcing rib plate; 2-4. Bolt holes on the circular component. Detailed Implementation

[0018] The present invention will be further described below through non-limiting embodiments and in conjunction with the accompanying drawings:

[0019] To address the problems and shortcomings in the manufacturing and use of sand boxes, such as the large variety of casting specifications and types, significant differences in individual piece weight, small batches of the same specification, the need to prepare sand boxes of many specifications and types, and the waste of funds and factory space caused by the need to store some specifications and types of sand boxes infrequently, a dual-purpose square and round casting sand box was designed to solve the aforementioned problems and shortcomings in the manufacturing and use of multi-specification sand boxes.

[0020] As attached Figures 1-3As shown, a dual-purpose (square and round) casting sand box includes a square sand box 1 and a circular component 2 built into the cavity of the square sand box 1. The circular component 2 is fixedly connected to the square sand box 1 as a whole by a connector 3. The square sand box 1 is the same as the square sand box in the prior art. The circular component 2 is a cylindrical structure, including a cylindrical component body 2-1. Annular end plates 2-2 are coaxially fixed to both ends of the component body 2-1. The inner diameter of the end plate 2-2 is the same as the inner diameter of the component body 2-1, and the outer diameter of the end plate 2-2 is adapted to the inner wall of the square sand box 1, and can be slightly smaller than the inner side length of the square sand box 1, so that the circular component 2 can be smoothly placed into the square sand box 1 with a small distance from the inner wall of the square sand box 1, facilitating the fixation of the circular component to the square sand box. To improve the structural strength of the circular component, it is preferable to arrange multiple reinforcing ribs 2-3 at intervals on the outer wall of the component body 2-1. The reinforcing ribs 2-3 are fixedly connected to the outer wall of the component body 2-1 and the end plates 2-2 at both ends of the component body. The inner diameter of the component body 2-1 is determined according to the specific requirements for producing ring-shaped castings. The height of the circular component 2 is the same as the height of the square sand box 1. The thickness of each component, including the component body 2-1, end plates 2-2, and reinforcing ribs 2-3, is determined based on strength requirements; generally, larger circular components 2 have thicker components, while smaller circular components 2 have thinner components. To facilitate the connection and fixation of the circular component 2 and the square sand box 1, it is preferable that the square sand box 1 and the circular component 2 are connected as a whole by bolts and nuts. That is, the connecting part 3 uses bolts and nuts. Bolt holes are respectively provided on the four side walls of the square sand box 1 and the side walls of the circular component 2. The bolt holes 1-1 on the four side walls of the square sand box 1 are all located at the tangent of the square and circle. Four bolt holes 2-4 are correspondingly provided on the side walls of the circular component 2. To ensure the strength at the bolt holes, reinforcing ribs 2-3 are also provided at the bolt holes 2-4 on the side walls of the circular component 2. The thickness of the bolt holes 2-4 is determined according to the strength. The circular component 2 in this utility model can be made by cutting and welding steel plates or by casting. The circular component 2 is placed vertically in the cavity of the square sand box 1, and the two ends of the circular component 2 are flush with the two ends of the square sand box 1. The square sand box 1 and the circular component 2 are detachably fixed together by bolts and nuts. After the circular component 2 and the square sand box 1 are combined, they are used in the production of ring castings. When casting ring castings, molding sand is filled into the circular component 2 to form a mold. Since the component body of the circular component 2 is a cylindrical structure, the sand mold thickness is uniform when casting ring castings, which can improve the quality of ring castings.

[0021] After the circular component 2 in this utility model is removed from the square sand box 1, the directional sand box 1 can continue to be used as an ordinary square sand box.

[0022] This utility model of a dual-purpose square and round casting sand box has a reasonable structural design, a wide range of applications, and is simple and convenient to disassemble and assemble. It can meet the needs of castings of different shapes and specifications, save on the manufacturing and production costs of sand boxes, and reduce the amount of sand boxes stored and the storage area.

[0023] The dual-purpose square and round casting sand box of this utility model can be modified from the existing square sand box. The following is a detailed description of specific embodiments.

[0024] Example 1

[0025] Reference Figure 1 , Figure 2 This embodiment designs and modifies a sand box for a ring-shaped casting used for sizing rollers of hot-rolled seamless steel pipes. The maximum outer diameter of the casting is Φ815mm, the inner diameter is Φ320mm, and the height is 460mm. This embodiment uses an existing square sand box with an inner side length of 1500×1500mm and a height of 230mm as the square sand box 1. The specifications of the circular component 2 are as follows: the maximum outer diameter of the end plate 2-2 is Φ1498mm, the inner diameter of the component body 2-1 and the end plate 2-2 is Φ1250mm, the height is 230mm, four reinforcing ribs 2-3 are evenly distributed along the outer wall of the component body 2-1, the inner diameter of the bolt holes 2-4 is Φ22mm, and the square sand box 1 also has corresponding Φ22mm bolt holes 1-1. The circular component 2 is made of 4mm thick steel plate. M20 bolts and nuts are used to connect and fix the circular component 2 to the square sand box 1.

[0026] This embodiment modified three sets of sand boxes and produced three sizing roll ring castings. Compared with production using square sand boxes, the solidification speed was accelerated, and all castings passed inspection, with a surface hardness difference of ≤3.5HRC. This embodiment also saved approximately 45% of molding sand compared to production using square sand boxes.

[0027] Example 2

[0028] Reference Figure 1 , Figure 2 This embodiment designs and modifies a sand box for annular castings used in tension reducing rollers for hot-rolled seamless steel pipes. The maximum outer diameter of the casting is Φ245mm, the inner diameter is Φ185mm, and the height is 95mm. This embodiment uses an existing square sand box with an inner side length of 650×650mm and a height of 95mm as the square sand box 1. The specifications of the circular component 2 are as follows: the maximum outer diameter of the end plate 2-2 is Φ648mm; the inner diameter of the component body 2-1 and the end plate 2-2 is Φ450mm; the height is 95mm; there are four reinforcing ribs 2-3 evenly distributed along the outer wall of the component body 2-1; the inner diameter of the bolt holes 2-4 is Φ14mm; and the square sand box 1 also has corresponding Φ14mm bolt holes 1-1. The circular component 2 is made of 2mm thick steel plate. M12 bolts and nuts are used to connect and fix the circular component 2 to the square sand box 1.

[0029] This embodiment modified three sets of sand boxes and produced three reducing roller ring castings. Compared with production using square sand boxes, the solidification speed was accelerated, and all castings passed inspection, with a surface hardness difference of ≤2HRC. This embodiment also saved approximately 60% of molding sand compared to production using square sand boxes.

[0030] This invention can meet the needs of castings of different shapes and specifications using different sand boxes. Compared with casting ring-shaped castings using square sand boxes, it significantly saves molding sand, accelerates solidification speed, ensures casting quality, and greatly reduces production costs.

[0031] This utility model is not limited to the above embodiments. Without departing from the design concept of this utility model, those skilled in the art can make various improvements or modifications to this utility model, and such changes and modifications should fall within the protection scope of this utility model.

Claims

1. A casting sand box that can be used in both square and round shapes, characterized in that: The device includes a square sand box and a circular component. The circular component has a cylindrical structure and is vertically arranged inside the cavity of the square sand box. The two ends of the circular component are flush with the two ends of the square sand box. The square sand box and the circular component are detachably and fixedly connected as a whole by a connector.

2. The dual-purpose (square and round) casting sand box according to claim 1, characterized in that: Bolt holes are provided on the four side walls of the square sand box and the side wall of the circular component, and the square sand box and the circular component are connected as one unit by bolts and nuts.

3. The dual-purpose square and round casting sand box according to claim 1, characterized in that: The circular component includes a cylindrical component body, with annular end plates coaxially fixed at both ends of the component body. The inner diameter of the end plates is the same as the inner diameter of the component body, and the outer diameter of the end plates is adapted to the inner wall of the square sand box.

4. The dual-purpose casting sand box for both square and round shapes according to claim 3, characterized in that: Multiple reinforcing ribs are arranged at intervals on the outer wall of the component body, and the reinforcing ribs are fixedly connected to the outer wall of the component body and the end plates at both ends of the component body.

5. The dual-purpose square and round casting sand box according to claim 4, characterized in that: Bolt holes are provided on the four side walls of the square sand box and the side wall of the circular component, respectively. The reinforcing ribs are provided at the bolt holes on the side wall of the circular component. The square sand box and the circular component are connected as one unit by bolts and nuts.

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