阅读说明：本技术 一种铸造用新型冷铁 (Novel chill is used in casting ) 是由 金志宏 朱峰 刘为国 余全 蔡常林 许久海 于 2019-10-29 设计创作，主要内容包括：本发明公开了一种铸造用新型冷铁,冷铁具有底面、顶面和侧面,所述底面用于接触(含直接接触及间接接触)铸件的表面,底面和顶面之间通过侧面连接(含直接连接及间接连接),冷铁的横截面面积自底面向顶面逐渐减小。本发明的新型冷铁结构简单巧妙,本身易加工且可以有效达到相应的技术效果,使边缘交界处的激冷作用缓和过渡,有效避免铸件在冷铁边缘产生裂纹。同时由于多边体结构的缘故,加大了散热面积,提升了热能的传导,提高了冷铁激冷效果,保证了铸件的产品质量,使铸件质量提升。(The invention discloses a novel chill for casting, which comprises a bottom surface, a top surface and side surfaces, wherein the bottom surface is used for contacting (including direct contact and indirect contact) the surface of a casting, the bottom surface and the top surface are connected through the side surfaces (including direct connection and indirect connection), and the cross section area of the chill is gradually reduced from the bottom surface to the top surface. The novel chilling block disclosed by the invention is simple and ingenious in structure, easy to machine and capable of effectively achieving the corresponding technical effect, so that the chilling action at the edge junction is in transition in a mild way, and the casting is effectively prevented from generating cracks at the edge of the chilling block. Meanwhile, due to the polygonal structure, the heat dissipation area is enlarged, the conduction of heat energy is improved, the chilling effect of the chilling block is improved, the product quality of the casting is ensured, and the quality of the casting is improved.)

1. The utility model provides a novel chill is used in casting which characterized in that: the chilling block (1) is provided with a bottom surface (11), a top surface (13) and a side surface (12), wherein the bottom surface (11) is used for contacting the surface of the casting (2), the bottom surface (11) and the top surface (13) are connected through the side surface (12), and the cross section area of the chilling block (1) is gradually reduced from the bottom surface (11) to the top surface (13).

2. The novel chill for casting according to claim 1, wherein: the thickness of the chilling block (1) is gradually reduced from the center to the edge.

3. The novel chill for casting according to claim 1 or 2, wherein: the side surfaces (12) comprise first side surfaces (121) in a trapezoid shape and second side surfaces (122) in a triangle shape, the first side surfaces (121) and the second side surfaces (122) are arranged in an end-to-end interval shape, adjacent trapezoids and the triangle are arranged in a same waist shape, the top edges of the trapezoids and the bottom edges of the triangle form the edges of the top surfaces (13), and the bottom edges of the trapezoids form the edges of the bottom surfaces (11).

4. The novel chill for casting according to claim 3, wherein: the number of the first side surface (121) and the second side surface (122) is equal, and at least three sides are provided.

5. The novel chill for casting according to claim 4, wherein: the number of the first side surface and the second side surface is four.

6. A novel chill for casting as claimed in claim 1, 2, 4 or 5, wherein: the bottom surface (11) is rectangular in shape, and the top surface (13) is octagonal in shape.

7. The novel chill for casting according to claim 6, wherein: the side length of the top surface (13) is one third of the side length of the same side on the bottom surface (11).

8. The novel chill for casting according to claim 1 or 2, wherein: the shape of the bottom surface (11) is circular, the shape of the top surface (13) is also circular, and the chilling block (1) is in a circular truncated cone shape.

9. A novel chill for casting as claimed in claim 1, 2, 4, 5 or 7, wherein: the thickness of the chilling block (1) is 0.7-1.3 times of that of the casting (2).

Technical Field

The invention relates to a novel chilling block for casting, and belongs to the technical field of casting.

Background

In the casting production process, because the complexity of casting parts is different and the wall thickness is not uniform, the cooling speed of each part is inconsistent in the solidification process, and casting defects are easy to generate. In order to ensure the quality of the casting, a chill is usually arranged in or on the cavity to be chilled to control shrinkage and obtain directional solidification, so as to improve the feeding efficiency of a riser and prevent the casting from producing casting defects such as shrinkage cavity, shrinkage porosity and the like.

At present, the chilling block is generally formed by casting carbon steel or cutting a steel plate. Except the conformal cold iron, the dimension of the cold iron is basically square regular cold iron and is placed on a working surface to be chilled. During use, however, the casting occasionally cracks at the chill edge interface; or after processing, because the chilling effect of the chilling block is not strong, the defects of subcutaneous shrinkage, looseness and the like frequently occur. The quality problems are that the appearance of the casting is influenced by a light person, the welding repair rate of the casting is increased, and the casting is possibly scrapped if the quality problems are serious.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a novel chill for casting, which can prevent a casting from generating cracks or shrinkage cavities at the boundary of the edge of the chill.

The purpose of the invention is realized by adopting the following technical scheme:

a novel chill for casting, the chill having a bottom surface for contacting (including direct contact and indirect contact) the surface of a casting, a top surface and side surfaces, the bottom surface and the top surface being connected by the side surfaces (including direct connection and indirect connection), the chill having a cross-sectional area that decreases from the bottom surface to the top surface.

By adopting the technical scheme, the chiller is of a cubic structure, the bottom surface area of the chiller is the largest and is used for being in contact with the surface of a casting and is a working surface, the chiller is generally placed in the middle of a molding box and is positioned in the center of the casting, the chiller is placed at a hot spot in the center of the bottom of the casting, the cross section area of the chiller is gradually reduced from the bottom surface (the working surface) to the top surface, chilling action is favorably mild and excessive, hot cracks or shrinkage holes are prevented from being generated due to asynchronous shrinkage of the junction of the chiller and a sand mold, and the problem in the background technology can be solved.

As a further improvement of the invention, the thickness of the chilling block is gradually reduced from the center to the edge. Under the normal condition, if the hot junction at the center of the bottom of the chill casting is not arranged, the natural cooling speed is slower than that of the top, and the riser is arranged at the top, the center of the bottom of the casting can be cooled at last, the phenomena of shrinkage cavity and the like can not be compensated, the chill is arranged to cool the hot junction earlier, so that the phenomenon is reduced, however, if the shape of the arranged chill is a regular cuboid or cube, the chilling effect of the chill on the casting is closely related to the thickness of the chill, if the thicknesses in the vertical direction are consistent, the chilling effect is equivalent, the chilling effect can be strongly compared with surrounding molding sand, and the casting is easy to crack at the edge of the working surface of the chill. This application scheme, the thickness of chill is from center department attenuate gradually to the edge, can make the even transition of chilling effect for the chilling effect of juncture relaxs the transition, effectively avoids the foundry goods to produce the crackle at the chill edge.

As a further improvement of the invention, the side surfaces comprise a first side surface in the shape of a trapezoid and a second side surface in the shape of a triangle, the first side surface and the second side surface are arranged in an interval shape in an end-to-end connection manner, the adjacent trapezoids and the triangle are arranged in a waist-sharing manner, the top side of each trapezoid and the bottom side of the triangle form the side of the top surface, and the bottom side of each trapezoid forms the side of the bottom surface. Through adopting above-mentioned technical scheme, the chill of this scheme is reformed transform by rectangle chill and is formed, uses bottom surface (working face) as the benchmark, uses certain angle excision top four angles, and the characteristic shows as a triangle-shaped cross-section after the excision, and all the other are trapezoidal cross-sections. The novel chilling block increases the surface area in an inclined plane mode, forms a polygonal structure, effectively increases the heat dissipation area during operation, and improves the conduction of heat energy; the chilling action at the junction is enabled to be in transition and the casting is effectively prevented from generating cracks at the edge of the chilling block.

As a further improvement of the invention, the number of the first side surface and the second side surface is equal, and at least three of the first side surface and the second side surface are both provided. Through adopting above-mentioned technical scheme, first side and second side looks interval set up, and the second side is the slope form, and both respectively are three at least, when having increased the surface area, make the shape that is the chill regular, thickness variation is even for chilling effect excessively alleviates.

As a further improvement of the present invention, the number of the first side surface and the second side surface is four. By adopting the technical scheme, the number of the surfaces of the first side surface and the second side surface is four, so that the bottom surface is quadrilateral, the chilling device can be adapted to the shape of a common casting on the one hand, has wide application range and convenient popularization, can achieve even transition of chilling effect, and solves the technical problem in the back shadow technology.

As a further improvement of the present invention, the bottom surface is rectangular in shape and the top surface is octagonal in shape. By adopting the technical scheme, the bottom surface is rectangular, can be rectangular or square, is adaptive to the shape of a common casting, is convenient to use and has obvious effect.

As a further development of the invention, the side length of the top side is one third of the side length of the same side on the bottom side. By adopting the technical scheme, the side length of the top surface is one third of that of the same side on the bottom surface, so that the thickness of the chilling block from the center to the edge is uniformly changed, and the chilling effect can reach the uniform transition effect.

As a further improvement of the present invention, the bottom surface is circular, the top surface is also circular, and the chill is circular truncated cone-shaped. By adopting the technical scheme, the circular truncated cone-shaped chilling block is also a scheme, and a good technical effect can be achieved.

As a further improvement of the invention, the thickness of the chilling block is 0.7-1.3 times of that of the casting. By adopting the technical scheme, the relation between the thickness of the chilling block and the thickness of the casting is beneficial to realizing uniform chilling to the maximum effect, if the chilling block is too thin, the chilling effect is not good, the technical problem cannot be solved, and if the chilling block is too thick, the chilling transition can bring new problems.

As a further improvement of the invention, the material of the chilling block is steel, aluminum or copper. By adopting the technical scheme, the material of the chilling block is preferably steel, and certainly, the material can also be aluminum material or copper material.

Compared with the prior art, the invention has the beneficial effects that: compare the square specification chiller of tradition, the cross sectional area of this novel chiller reduces from the bottom surface to the top surface gradually, and the thickness size of chiller progressively thins to the edge, makes the chilling effect of juncture relax the transition, effectively avoids the foundry goods to produce the crackle at the chiller edge. Meanwhile, due to the polygonal structure, the heat dissipation area is enlarged, the conduction of heat energy is improved, the chilling effect of the chilling block is improved, and the product quality of the casting is ensured.

Drawings

Fig. 1 is a schematic structural view of a novel chill for casting according to embodiment 1 of the present invention.

Fig. 2 is a plan view of the novel chiller of example 1.

Fig. 3 is a front view of the novel chiller of embodiment 1.

Fig. 4 is a schematic view showing the operation of the novel chiller according to example 1.

Fig. 5 is a schematic structural view of a novel chill for casting according to example 2 of the present invention.

Fig. 6 is a schematic structural view of a novel chill for casting according to example 3 of the present invention.

Fig. 7 is a schematic structural view of a novel chill for casting according to embodiment 4 of the present invention.

In the figure: 1. performing cold iron; 11. a bottom surface; 12. a side surface; 121. a first side surface; 122. a second side surface; 13. a top surface; 2. casting; 3. molding sand; 4. and (5) feeding a riser.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1

Referring to fig. 1 to 4, the novel chill for casting 1 has a bottom surface 11, a top surface 13 and side surfaces 12, wherein the bottom surface 11 is used for contacting the surface of a casting 2, the bottom surface 11 and the top surface 13 are connected through the side surfaces 12, and the cross-sectional area of the chill 1 is gradually reduced from the bottom surface 11 to the top surface 13. The thickness of the chiller 1 gradually decreases from the center to the edge. The side surfaces 12 include a first side surface 121 shaped like a trapezoid and a second side surface 122 shaped like a triangle, the first side surface 121 and the second side surface 122 are arranged in an interval manner in an end-to-end connection, the adjacent trapezoids and the triangle are arranged in a waist-sharing manner, the top edge of each trapezoid and the bottom edge of the triangle form the edge of the top surface 13, and the bottom edge of each trapezoid forms the edge of the bottom surface 11.

In this embodiment, the chiller 1 is formed by modifying a rectangular chiller, and four corners of the top are cut off at a certain angle based on the bottom surface (working surface) 11, and the cut-off features are 4 triangular cross sections, i.e., a second side surface 122, and the rest are a first side surface 121, which is trapezoidal. The second side surface 122 is inclined, so that the surface area of the novel chilling block is increased in an inclined surface mode to form a polygonal structure, the heat dissipation area is effectively increased during operation, and the heat conduction is improved; meanwhile, the thickness of the novel chilling block is gradually reduced from the center to the edge, so that the chilling action at the junction is gradually transited, and the casting is effectively prevented from cracking at the edge of the chilling block.

The thickness in the scheme refers to the size in the vertical direction, namely the distance between the upper edge and the lower edge of the chilling block after being intercepted by the same longitudinal plane. The center of the chiller may be the top surface 13 and the portion thereof formed by projecting to the bottom surface 11, which is the approximate center.

The number of the first side 121 and the second side 122 is equal, and is at least three. In this embodiment, refer to fig. 1 to 3. The number of the first side surface and the second side surface is four. More specifically, the bottom surface 11 is quadrilateral in shape and the top surface 13 is octagonal in shape. The side length of the top surface 13 is one third of the side length of the same side on the bottom surface 11, and from another perspective, the projection of the chiller from the bottom surface 11 to the top surface 13 forms a pattern such that each side of the bottom surface is trisected.

The thickness of the chilling block 1 is 0.7-1.3 times of that of the casting 2. An optimal chilling effect can be achieved.

The material of the chiller 1 is steel, aluminum or copper. Various materials can be selected according to actual requirements.

The working principle is as follows:

referring to fig. 4, firstly, according to the process requirement and the size of the casting, selecting proper chilling blocks and quantity;

secondly, a chill 1 is arranged in or on the surface of a cavity to be chilled, in the figure 4, the bottom surface 11 of the chill 1 faces upwards, the top surface 13 faces downwards and is placed at the lower part of the molding sand 3, and a riser 4 is arranged at the upper part of the molding sand 3;

finally, the operation requires that the bottom surface (working surface) 11 is in contact with the surface of the casting 2, and the top surface 13 and the side surfaces 12 are in contact with the molding sand 3.

During operation, due to the structural shape of the chilling block 1, on one hand, the heat dissipation area is effectively enlarged, and the conduction of heat energy is improved; the thickness of the chiller is gradually reduced from the center to the edge, so that the chilling action of the edge of the junction of the casting and the chiller is gradually transited, and the casting is effectively prevented from generating cracks at the edge of the chiller.

Example 2

Referring to fig. 5, in the present embodiment, the bottom surface 11 is triangular, and the top surface 13 is hexagonal, and other features may be the same as or similar to those in embodiment 1, such as a first side surface 121 and a second side surface 122, where the first side surface is trapezoidal and the second side surface is triangular. However, in this embodiment, the number of the first side 121 is three, and the number of the second side is three, which also achieves the effect of uniform chilling transition.

Example 3

Referring to fig. 6, in the present embodiment, the bottom surface 11 is a pentagon, the top surface 13 is a decagon, and other features may be the same as or similar to those in embodiment 1, such as a first side surface 121 and a second side surface 122, where the first side surface is a trapezoid and the second side surface is a triangle. However, in this embodiment, the number of the first side surfaces 121 is five, and the number of the second side surfaces is five, which also achieves the effect of uniform chilling transition.

Example 4

Referring to fig. 7, the bottom surface 11 is circular, the top surface 13 is also circular, the chiller 1 is circular truncated cone-shaped, the side surfaces 12 are smooth transition surfaces, and other features are the same as or similar to those of embodiment 1. The effect of uniform transition of chilling action can be achieved.

In summary, the shape of the chiller 1 in the above embodiments may also be matched according to the shape of the casting 2, so as to achieve better chilling effect, and specifically, the shape of the bottom surface 11, the shape of the top surface 13, and the shape of the side surface 12 may be changed according to actual requirements, so long as the requirement is met that the cross-sectional area of the chiller is gradually reduced from the bottom surface to the top surface, or the requirement is met that the thickness of the chiller is gradually reduced from the center to the edge, the technical effect of the present application can be achieved, and all the technical effects are understood to be within the scope of the present application.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.