Wear-resisting ball forming device

Abstract

The utility model relates to a wear-resisting ball forming device which comprises a lower die, a plurality of groups of lower ball grooves distributed from inside to outside are formed in the upper wall of the lower die, a lower vacuum cavity is formed in the edge of the lower die, an upper die is arranged on the upper wall of the lower die, upper ball grooves matched with the lower ball grooves are formed in the lower wall of the upper die, and a temporary storage groove is formed in the center of the upper wall of the upper die. A flow guide hole is communicated between the upper ball groove on the outermost side and the temporary storage groove, a range extending hole is communicated between the upper ball groove on the inner side and the temporary storage groove, and an upper vacuum cavity is formed in the edge of the upper die. The lower vacuum cavity and the upper vacuum cavity can keep heat at the edge of the mold, the heat dissipating capacity at the edge of the mold is reduced, the length of the bent range extending hole can be close to the length of the flow guide hole in the outer side, and the uniformity of heat distribution during mold forming is improved.

Description

Technical Field

[0001] This utility model belongs to the field of casting molding technology, specifically referring to a wear-resistant ball forming device. Background Technology

[0002] Wear-resistant balls are spherical consumable materials with high hardness used in construction crushing. The surface of wear-resistant balls is required to be uniform and smooth, free of defects such as pits and pores, in order to improve the actual service life of the wear-resistant balls.

[0003] Wear-resistant balls are mainly produced through casting. To obtain a smooth, non-porous product, it is necessary to control the heat distribution of the molten iron during the casting process and minimize the temperature difference during casting. However, to improve casting efficiency, the casting mold is usually equipped with multiple layers of spherical grooves from the inside to the outside, so that multiple wear-resistant balls can be cast at once.

[0004] The internal and external design of the mold results in varying times and path lengths for the molten iron to travel from the pouring gate to each spherical groove, leading to different temperature variations and thus casting inconsistencies. Furthermore, the heat concentrates in the center of the mold, while the outer edges dissipate heat significantly faster, further contributing to casting inconsistencies and quality problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a wear-resistant ball forming device, which at least partially solves the above problems.

[0006] The technical solution adopted by this utility model is as follows: The wear-resistant ball forming device proposed by this utility model includes a lower mold, and the upper wall of the lower mold is provided with multiple sets of lower ball grooves distributed from the inside to the outside.

[0007] Furthermore, the lower mold has a lower vacuum cavity at its edge, and a second connector is connected to the lower vacuum cavity.

[0008] Furthermore, the lower vacuum chamber is enclosed outside the lower ball groove, and the upper wall of the lower mold is provided with a sealing platform.

[0009] Furthermore, the upper wall of the lower mold is fitted with an upper mold, and the lower mold and the upper mold are connected by bolts. The lower wall of the upper mold is provided with a fitting groove, which is installed in conjunction with a sealing platform.

[0010] Furthermore, the lower wall of the upper mold is provided with an upper ball groove that mates with the lower ball groove, and a temporary storage groove is provided at the center of the upper wall of the upper mold. A guide hole is connected between the outermost upper ball groove and the temporary storage groove, and an extension hole is connected between the inner upper ball groove and the temporary storage groove. The lengths of the extension hole and the guide hole are matched.

[0011] Furthermore, the upper mold has an upper vacuum cavity at its edge, which covers the upper ball groove and the guide hole, and a first connector is connected to the upper vacuum cavity.

[0012] Furthermore, a dumbbell-shaped gating cup is connected to the upper wall of the upper mold, and the dumbbell-shaped gating cup is connected to the temporary storage tank.

[0013] The beneficial effects achieved by this utility model are as follows: the lower vacuum chamber and the upper vacuum chamber can retain the heat at the edge of the mold, reduce the heat dissipation at the edge of the mold, reduce the heat difference between the middle area and the edge area of ​​the mold, and the length of the curved extension hole can be close to the length of the outer guide hole, so that the time and temperature of each group of molten iron entering the mold groove are similar, thereby improving the uniformity of heat distribution during mold forming. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 A sectional view;

[0016] Figure 3 This is a sectional view of the upper mold;

[0017] Figure 4 This is a sectional view of the lower mold.

[0018] Among them, 1. lower mold, 2. upper mold, 3. dumbbell-shaped pouring cup, 4. first joint, 5. second joint, 6. bolt, 7. lower ball groove, 8. lower vacuum chamber, 9. upper ball groove, 10. upper vacuum chamber, 11. guide hole, 12. extension hole, 13. temporary storage groove, 14. fitting groove, 15. sealing platform.

[0019] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1 and Figure 2 As shown in the figure, the wear-resistant ball forming device proposed in this embodiment of the present invention includes a lower mold 1. When in use, the lower mold 1 is fixed and stationary. The upper wall of the lower mold 1 is provided with multiple sets of lower ball grooves 7 distributed from the inside to the outside. The size of the lower ball grooves 7 is adapted to the size of the wear-resistant ball.

[0023] The lower mold 1 has a lower vacuum chamber 8 on its edge. A second connector 5 is connected to the lower vacuum chamber 8. The second connector 5 is connected to an external vacuum pump. The vacuum pump can draw the gas in the lower vacuum chamber 8 to a negative pressure close to a vacuum state. The lower vacuum chamber 8 in a vacuum state can reduce heat transfer on both sides and has a better heat preservation effect.

[0024] like Figure 4 As shown, the lower vacuum cavity 8 covers the lower ball groove 7. That is, the lower vacuum cavity 8 is located outside the lower ball groove 7 in the horizontal direction and at the lower end of the lower ball groove 7 in the vertical direction, thereby isolating the lower ball groove 7 from the lower end and the outside, reducing the heat loss of molten iron in the lower ball groove 7. The upper wall of the lower mold 1 is provided with a sealing platform 15.

[0025] like Figure 2 and Figure 3 As shown, the upper wall of the lower mold 1 is fitted with the upper mold 2, and the lower mold 1 and the upper mold 2 are connected by bolts 6. The lower wall of the upper mold 2 is provided with a fitting groove 14, which is fitted with the sealing platform 15.

[0026] The lower wall of the upper mold 2 is provided with an upper ball groove 9 that mates with the lower ball groove 7. The upper ball groove 9 and the lower ball groove 7 are engaged to form a complete sphere. The size and outline of this sphere are the size and outline of the wear-resistant ball. A temporary storage groove 13 is provided at the center of the upper wall of the upper mold 2. A guide hole 11 is connected between the outermost upper ball groove 9 and the temporary storage groove 13. An extension hole 12 is connected between the inner upper ball groove 9 and the temporary storage groove 13. The length of the extension hole 12 is matched with that of the guide hole 11. The high-temperature molten iron is temporarily stored in the temporary storage groove 13 and then flows through the guide hole. The molten iron flows through the lower ball groove 7 and the upper ball groove 9 at different locations via the extension holes 11 and 12. During the flow, the temperature of the molten iron will change. Depending on the number of layers distributed in the upper ball groove 9, the shape of each layer of extension holes 12 is different. However, the length of each layer of extension holes 12 is adapted to the length of the outermost guide hole 11. In this embodiment, the upper ball groove 9 is distributed in two layers, and the length of the innermost extension hole 12 is the same as the length of the guide hole 11. This setting can reduce the difference in the temperature change of the molten iron.

[0027] The upper mold 2 has an upper vacuum chamber 10 on its edge. The upper vacuum chamber 10 covers the upper ball groove 9 and the guide hole 11. The function of the upper vacuum chamber 10 is the same as that of the lower vacuum chamber 8, which is to reduce the heat transfer between the molten iron and the outside. The upper vacuum chamber 10 is located outside the upper ball groove 9 in the horizontal direction and above the guide hole 11 in the vertical direction, thereby reducing the heat loss of the molten iron in the upper ball groove 9. The upper vacuum chamber 10 is connected to a first connector 4, which is also connected to an external vacuum pump.

[0028] The upper wall of the upper mold 2 is connected to a dumbbell-shaped pouring cup 3, which is connected to the temporary storage tank 13. The dumbbell-shaped pouring cup 3 has a narrow, constricted shape in the middle, which can reduce the heat exchange between the molten iron in the temporary storage tank 13 and the external gas, and maintain the temperature of the molten iron.

[0029] In specific operation, the upper mold 2 is fastened onto the lower mold 1, so that the sealing platform 15 is fully embedded in the fitting groove 14. Then, the upper mold 2 and the lower mold 1 are connected and tightened by bolts 6, so that the upper ball groove 9 and the lower ball groove 7 are sealed and fitted. Then, the upper vacuum chamber 10 is evacuated to a near-vacuum state through the first connector 4, and the lower vacuum chamber 8 is evacuated to a near-vacuum state through the second connector 5.

[0030] The heated molten iron is poured into the dumbbell-shaped pouring cup 3, and then falls into the temporary storage tank 13. It then flows from the guide hole 11 into the outermost upper ball groove 9 and lower ball groove 7, and from the extension hole 12 into the inner upper ball groove 9 and lower ball groove 7. During this process, the path length of the molten iron is similar, and the heat exchange with the outside is blocked by the upper vacuum chamber 10 and lower vacuum chamber 8. The temperature and temperature drop of the molten iron in the upper ball groove 9 and lower ball groove 7 of each level are similar, thereby reducing the temperature difference of the molten iron in each mold groove and achieving a better molding appearance.

[0031] After the casting is completed, let the upper mold 2 and lower mold 1 cool for a certain period of time, then remove the bolts 6, open the upper mold 2, and take out the wear-resistant balls from the lower ball groove 7.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wear-resistant ball forming device, characterized in that, include: The lower mold (1) has multiple sets of lower ball grooves (7) distributed from the inside to the outside on its upper wall. The lower mold (1) has a lower vacuum cavity (8) on its edge, which covers the lower ball grooves (7). The upper mold (2) is detachably fastened to the upper wall of the lower mold (1). The lower wall of the upper mold (2) is provided with an upper ball groove (9) that cooperates with the lower ball groove (7). The upper wall of the upper mold (2) is provided with a temporary storage groove (13). The outermost upper ball groove (9) and the temporary storage groove (13) are connected by a guide hole (11). The inner upper ball groove (9) and the temporary storage groove (13) are connected by a range-extending hole (12). The length of the range-extending hole (12) is matched with that of the guide hole (11). The edge of the upper mold (2) is provided with an upper vacuum cavity (10). The upper vacuum cavity (10) covers the upper ball groove (9) and the guide hole (11).

2. The wear-resistant ball forming device according to claim 1, characterized in that: The upper wall of the upper mold (2) is connected to a dumbbell-shaped pouring cup (3), which is connected to a temporary storage tank (13).

3. The wear-resistant ball forming device according to claim 1, characterized in that: The lower vacuum chamber (8) is connected to a second connector (5), and the upper vacuum chamber (10) is connected to a first connector (4).

4. The wear-resistant ball forming device according to claim 1, characterized in that: The lower mold (1) has a sealing platform (15) on its upper wall and the upper mold (2) has a fitting groove (14) on its lower wall. The fitting groove (14) and the sealing platform (15) are fitted together and installed. The lower mold (1) and the upper mold (2) are connected by bolts (6).

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