Structure for casting chiller on large working table

Abstract

The utility model discloses a chiller structure for casting a large working table, which comprises a chiller body, and a preset number of transverse spacing grooves and longitudinal spacing grooves are formed in the upper surface of the chiller body in a criss-cross manner at intervals; the transverse interval grooves and the longitudinal interval grooves divide the upper surface of the chilling block body into rectangular refrigeration blocks which are distributed at equal intervals in a matrix mode, and sand hanging areas are formed by the transverse interval grooves and the longitudinal interval grooves. A peripheral plate is fixedly arranged on the periphery of the chilling block body, and the upper surface of the peripheral plate is 12 mm higher than the middle area. A bottom plate is fixedly arranged on the lower end face of the chilling block body. Longitudinal supports are arranged at the bottom of the bottom plate at preset intervals. The chilling block body is of an integrated structure, and the problems that the workload is complex and positioning is inaccurate due to the fact that all chilling blocks are manually and independently placed are solved. The transverse interval grooves and the longitudinal interval grooves are formed in the upper surface of the chilling block body, so that the contact area of the chilling block body and the sand isolation layer is increased, a sand hanging area is formed, and the chilling block is stable and not prone to falling off.

Description

Technical Field

[0001] The utility model relates to the field of casting tools for metal casting, in particular to a cold iron structure for casting a large workbench surface. Background Art

[0002] A chill is a chilling object placed inside the cavity, on the cavity surface and inside the mold to accelerate the local cooling rate of the casting. The chill is used in conjunction with the gating system and riser system to control the solidification sequence of the casting to obtain a qualified casting. By reasonably using the chill and insulating riser technology, the process yield of steel castings can reach more than 70%; placing chills at appropriate parts of the casting can improve the feeding channel, improve the internal quality grade of the casting, and provide high-quality castings.

[0003] In the casting of a machine tool workbench, since the bearing surface of the workbench requires a relatively large casting thickness, in order to achieve the cooling of the molten iron during the casting process and to avoid problems such as gas being unable to be discharged due to the direct contact of the molten iron with the chill and being subjected to the chilling effect, the casting of the machine tool workbench mostly uses sand mold casting with the chill sand separation method. And for the chill sand separation setting method used in the chill sand separation setting method disclosed in the Chinese invention patent application with the application number 201710526629.3, it is necessary to pre-set positioning blocks one by one and it is necessary to connect the chill, the positioning block and the pattern body in sequence, which is inconvenient to operate; and after the mold is made, it is difficult to control the flatness of the surface of the mold located at the top surface position of the pattern body. The surface of the mold is formed by a surface of each positioning block and the inner mold sand of the mold, and is easily affected by the manufacturing accuracy of the positioning block and the connection accuracy between the positioning block and the top surface of the pattern body, resulting in poor flatness of the surface of the mold. Summary of the Invention

[0004] The utility model provides a cold iron structure for casting a large workbench surface. The T-shaped grooves on the chill plate increase the contact area between the chill plate body and the sand separation layer, thereby increasing the cooling rate.

[0005] The utility model adopts the following technical scheme: a cold iron structure for casting a large workbench surface, including a chill body 1. The upper surface of the chill body 1 is provided with a preset number of transverse spacing grooves 2 and longitudinal spacing grooves 3 which are criss-crossed and spaced apart. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 are perpendicular to each other. The transverse spacing grooves 2 are dovetail grooves, and the longitudinal spacing grooves 3 are T-shaped grooves. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 divide the upper surface of the chill body 1 into rectangular cooling blocks 4 which are equally spaced in a matrix form. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 themselves form a sand hanging area.

[0006] The periphery of the chill body 1 is fixedly provided with a peripheral plate 5. The transverse width of the peripheral plate 5 is 130 mm, the longitudinal width is 200 mm, and the upper surface of the peripheral plate 5 is 12 mm higher than the middle area. The lower end surface of the chill body 1 is fixedly provided with a bottom plate 6, and longitudinal supports 7 with a preset interval are arranged at the bottom of the bottom plate 6. The number of the longitudinal supports 7 is not less than 3.

[0007] Preferably, a through hole 8 parallel to the longitudinal spacing groove 3 is formed in the bottom plate 6 between the two longitudinal spacing grooves 3.

[0008] Preferably, the longitudinal supports 7 are spaced in multiple sections, and the number of intervals of the longitudinal supports 7 is not less than 3.

[0009] Working principle: After the upper box is molded, the mold is taken out and coated with paint. At the same time, the chill body 1 directly serves as the lower box. After 12 mm of sand is laid in the middle area and is level with the peripheral plate 5 as a sand separation layer to cover the upper part of the chill body 1, resin sand is filled in the transverse spacing grooves 2 and the longitudinal spacing grooves 3 to form a sand hanging area, and then it is coated with paint. After that, the upper box is placed above the chill body 1, the upper box is pressed with a pressing plate, and resin sand is surrounded around the outer periphery of the upper box. Then, even if the molten iron leaks, the outer ring resin sand blocks the overflow of the molten iron.

[0010] Beneficial effects: The chill body of the utility model is of an integral structure, which avoids the cumbersome workload of manually placing each chill independently and the problem of inaccurate positioning. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 arranged on the upper surface of the chill body 1 increase the contact area between the chill body 1 and the sand separation layer, and form a sand hanging area by itself, which is stable and not easy to fall off. Thus, the problem of chill position error is effectively avoided, the appearance quality of the product is effectively guaranteed, and the yield is improved. When encountering a workbench casting with a large wall thickness, in order to obtain a good chilling effect and achieve the densification of the product tissue structure, further cooling effect can be realized by introducing compressed air or zero-degree nitrogen into the through hole 8 arranged on the bottom plate 6. Description of the drawings

[0011] Figure 1 It is a top view structural schematic diagram of the utility model.

[0012] Figure 2 It is a front view structural schematic diagram of the utility model.

[0013] Figure 3 It is a side view structural schematic diagram of the utility model.

[0014] In the figure: chill body 1, transverse spacing groove 2, longitudinal spacing groove 3, refrigeration block 4, peripheral plate 5, bottom plate 6, longitudinal support 7, through hole 8. Detailed implementation manners

[0015] The following further describes the utility model in conjunction with the drawings and embodiments.

[0016] Example 1: As shown in Figure 1 —3, a chiller structure for casting a large workbench surface includes a chiller body 1. On the upper surface of the chiller body 1, a preset number of transverse spacing grooves 2 and longitudinal spacing grooves 3 are arranged in a criss-cross pattern and at intervals. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 intersect perpendicularly. The transverse spacing grooves 2 are dovetail grooves, and the longitudinal spacing grooves 3 are T-shaped grooves. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 divide the upper surface of the chiller body 1 into rectangular cooling blocks 4 that are equally spaced in a matrix form. The transverse spacing grooves 2 and the longitudinal spacing grooves 3 themselves form a sand hanging area.

[0017] Peripheral plates 5 are fixedly arranged around the chiller body 1. The transverse width of the peripheral plates 5 is 130 mm, and the longitudinal width is 200 mm. The upper surface of the peripheral plates 5 is 12 mm higher than the middle area. A bottom plate 6 is fixedly arranged on the lower end surface of the chiller body 1. Longitudinal supports 7 with a preset interval are arranged at the bottom of the bottom plate 6, and the number of longitudinal supports 7 is not less than 3. The longitudinal supports 7 are spaced in multiple sections, and the number of intervals of the longitudinal supports 7 is not less than 3. Through holes 8 parallel to the longitudinal spacing grooves 3 are formed in the bottom plate 6 between two longitudinal spacing grooves 3.

[0018] Working principle: After the mold is taken out after the upper box is modeled and the coating is brushed, at the same time, the chiller body 1 directly serves as the lower box. After 12 mm of sand is laid in the middle area and is level with the peripheral plates 5 as a sand separation layer to cover the upper part of the chiller body 1, resin sand is filled in the transverse spacing grooves 2 and the longitudinal spacing grooves 3 to form a sand hanging area, and the coating is brushed. Then, the upper box is placed above the chiller body 1, the upper box is pressed with a pressing plate, and resin sand is surrounded around the outer circumference of the upper box. Then, even if the molten iron runs out of water, the outer ring of resin sand hinders the overflow of the molten iron.

Claims

1. A chiller structure for casting a large work surface, comprising a chiller body (1), characterized in that: The upper surface of the cold iron body (1) is provided with a preset number of transverse spacing grooves (2) and longitudinal spacing grooves (3) in a crisscross pattern and at intervals, the transverse spacing grooves (2) and the longitudinal spacing grooves (3) intersecting each other perpendicularly, the transverse spacing grooves (2) being dovetail grooves, and the longitudinal spacing grooves (3) being T-shaped grooves, the transverse spacing grooves (2) and the longitudinal spacing grooves (3) dividing the upper surface of the cold iron body (1) into rectangular cooling blocks (4) distributed at equal intervals in a matrix form, and the transverse spacing grooves (2) and the longitudinal spacing grooves (3) themselves forming a sand hanging area; The cold iron body (1) is fixedly provided with peripheral plates (5) on all sides, the peripheral plates (5) have a lateral width of 130 mm and a longitudinal width of 200 mm, and the upper surface of the peripheral plates (5) is 12 mm higher than the middle area; the lower end surface of the cold iron body (1) is fixedly provided with a bottom plate (6), and the bottom of the bottom plate (6) is provided with longitudinal supports (7) at preset intervals, and the number of the longitudinal supports (7) is not less than 3.

2. A chiller structure for casting a large work surface according to claim 1, characterized in that: A through hole (8) parallel to the longitudinal spacing grooves (3) is provided on the bottom plate (6) between the two longitudinal spacing grooves (3).

3. A chiller structure for casting a large work surface according to claim 1 or 2, characterized in that: The longitudinal supports (7) are spaced apart in multiple sections, and the number of the longitudinal supports (7) is not less than 3.

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