A type frame anti-crack casting model for mine car

Abstract

The utility model relates to a kind of A-shaped frame anti-crack casting model for mine car in sand casting technology field, include A-shaped frame body, the A-shaped frame body includes two head portion integrated connection's inclined strut leg, the first muscle plate is connected between the inner corresponding face head end of two inclined strut legs, the head portion integrated connection's two side surfaces of two inclined strut legs are respectively provided with first riser piece and second muscle plate, the long strip tie between the inner corresponding face tail end of two inclined strut legs is connected, the long strip tie middle part is provided with the gate piece in the same direction with first riser piece, the tail end of two inclined strut legs is equipped with the second riser piece in the same direction with first riser piece;The casting model can avoid casting defects.

Description

Technical Field

[0001] This utility model relates to the field of sand casting technology, and in particular to a crack-resistant casting model for an A-frame used in mining cars. Background Technology

[0002] The company typically uses water glass sand casting to produce A-frame castings for mining cars. This process usually involves using wooden or metal molds. The water glass sand casting process includes sand mixing, molding, mold repair and assembly, pouring, sand removal and cleaning, heat treatment, and shot blasting. The mold pattern is crucial to the final shape of the product. Because the A-frame consists of two diagonal support legs, castings produced using traditional molds are prone to defects such as cracks at the ends and joints. Welding repairs are very labor-intensive and time-consuming, resulting in low efficiency and affecting the overall quality of the product. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art and solve the existing technical problems, this utility model discloses an anti-crack casting model for A-frames of mine cars, which can avoid casting defects.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A crack-resistant casting model for an A-frame used in mining cars includes an A-frame body. The A-frame body includes two diagonally connected legs with their heads integrally connected. A first stiffening plate is connected between the inner corresponding ends of the two diagonally connected legs. A first riser and a second stiffening plate are respectively provided on the two sides of the head of the two diagonally connected legs. A long tie rod is connected between the inner corresponding ends of the two diagonally connected legs. A gating element in the middle of the long tie rod is provided in the same direction as the first riser. A second riser in the same direction as the first riser is provided at the end of each of the two diagonally connected legs.

[0005] Furthermore, the inner corresponding ends of the two diagonal bracing legs form a transition arc surface, and the first stiffening plate is located in the center of the transition arc surface and perpendicular to the transition arc surface.

[0006] Furthermore, the second stiffening plate corresponds parallel to the long tie rod.

[0007] Furthermore, the tail end face of the inclined support leg is integrally connected to a foot plate, and the long tie rod and the second riser are both integrally connected to the corresponding foot plate.

[0008] Furthermore, the A-type frame also includes a top block integrally connected to the heads of the two diagonal braces, and the top block has a rounded transition with the corresponding outer surfaces of the two diagonal braces.

[0009] Furthermore, the top block and the two inclined support legs are provided with through holes on their corresponding outer surfaces.

[0010] By adopting the technical solution described above, this utility model has the following beneficial effects: The present invention discloses a crack-resistant casting model for A-frames used in mine cars. By setting long tie rods, a first rib plate, and a second rib plate on the model, it can prevent cracks from appearing at the head end of the subsequent A-frame casting from multiple directions. Moreover, after heat treatment, the first and second rib plates, which may cause shrinkage defects, can be cut off. In addition, by setting the gating part on the long tie rod and setting corresponding first and second risers at the end of the A-frame, the casting cooling rate is controlled, and the thermal points are balanced and decomposed, reducing pouring time and stress concentration, ensuring the integrity of the casting, and reducing the generation of defects. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 yes Figure 1 A schematic diagram of the implementation structure from another angle.

[0012] In the diagram: 1. Diagonal brace; 101. Transition arc surface; 102. Through hole; 2. Top block; 3. First stiffener plate; 4. First riser; 5. Long tie rod; 6. Sprue; 7. Second riser; 8. Foot plate; 9. Second stiffener plate. Detailed Implementation

[0013] The technical solution of this utility model will be described below with reference to the accompanying drawings of the embodiments of this utility model. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this utility model for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0014] Combined with appendix Figure 1-2 The aforementioned anti-crack casting model for an A-frame used in mining cars includes an A-frame body, which includes two inclined support legs 1 integrally connected at their heads. According to the actual connection requirements of the A-frame, the A-frame body also includes a top block 2 integrally connected to the heads of the two inclined support legs 1. The top block 2 has a rounded transition with the corresponding outer surfaces of the two inclined support legs 1. In addition, the corresponding outer surfaces of the top block 2 and the two inclined support legs 1 are provided with through holes 102, which facilitate the cleaning of the core sand inside the cavity and the dispersion of stress. Two symmetrically arranged diagonal braces 1 are connected by a first stiffening plate 3 between their inner corresponding ends. The cavity formed by the first stiffening plate 3 can replenish liquid metal during casting, thereby further filling the internal shrinkage gaps and avoiding defects such as porosity and shrinkage cavities. More importantly, the cast first stiffening plate 3 can increase the connection strength between the ends of the two diagonal braces 1, preventing cracks. If necessary, the inner corresponding ends of the two diagonal braces 1 form a transition arc surface 101 to structurally eliminate the possibility of right-angle cracks. The first stiffening plate 3 is located in the center of the transition arc surface 101 and perpendicular to it. Figure 1 The first stiffener 3 shown is set horizontally because cracks are more likely to form vertically here, and the horizontal tensioning effect is better. The two diagonal bracing legs 1 are integrally connected, and the two sides of the head are respectively provided with a first riser 4 and a second stiffening plate 9. Specifically, the second stiffening plate 9 is parallel and corresponds to the long tie rod 5, as shown in the attached figure. Figure 2 As shown, this also avoids the generation of casting cracks on this side. A long tie rod 5 is connected between the inner corresponding ends of the two inclined support legs 1. The long tie rod 5 tightens the two inclined support legs 1 from the tail end, which not only avoids the generation of cracks, but also further increases the connection strength. A gating part 6 with the same direction as the first riser part 4 is provided in the middle of the long tie rod 5. The gating part 6 is set in the long tie rod 5. Even if a defect is formed, it will not affect the main structure. The tail ends of the two inclined support legs 1 are provided with second riser parts 7 with the same direction as the first riser part 4. The casting cooling rate is controlled by the riser parts, reducing the pouring time, ensuring the integrity of the casting, and reducing the generation of defects. As needed, a foot plate 8 is integrally connected to the tail end face of the inclined support leg 1. The long tie rod 5 and the second riser part 7 are integrally connected to the corresponding foot plate 8. The second riser part 7 can also be set as an ellipse according to the width of the foot plate 8.

[0015] The present invention describes a crack-resistant casting model for an A-frame used in mine cars. Based on this model, the mold is modified and assembled to form a cavity identical to the model for subsequent pouring. The improved casting process has a pouring temperature of 1540-1580℃ and a pouring time reduced to 35 seconds. The cast parts after pouring can avoid cracking. After heat treatment, the ribs can be cut off. After shot blasting and grinding, magnetic particle inspection showed no cracks in multiple batches.

[0016] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A type A frame anti-crack casting model for mine cars, characterized in that: The device includes an A-type frame, which comprises two diagonally connected legs with their heads integrally connected. A first stiffening plate is connected between the inner corresponding ends of the two diagonally connected legs. A first riser and a second stiffening plate are respectively provided on the two sides of the head of the two diagonally connected legs. A long tie rod is connected between the inner corresponding ends of the two diagonally connected legs. A gate component in the middle of the long tie rod is provided in the same direction as the first riser component. A second riser component in the same direction as the first riser component is provided at the end of each of the two diagonally connected legs.

2. The anti-crack casting model for A-frames used in mine cars according to claim 1, characterized in that: The inner corresponding ends of the two diagonal bracing legs form a transition arc surface, and the first stiffening plate is located in the center of the transition arc surface and is perpendicular to the transition arc surface.

3. The anti-crack casting model for A-frames used in mine cars according to claim 1, characterized in that: The second stiffener plate is parallel to and corresponds to the long tie rod.

4. The anti-crack casting model for A-frames used in mine cars according to claim 1, characterized in that: The tail end face of the inclined support leg is integrally connected to the foot plate, and the long tie rod and the second riser are both integrally connected to the corresponding foot plate.

5. The anti-crack casting model for A-frames used in mine cars according to claim 1, characterized in that: The A-frame also includes a top block integrally connected to the heads of the two diagonal braces, with the top block having a rounded transition with the corresponding outer surfaces of the two diagonal braces.

6. The anti-crack casting model for A-frames used in mine cars according to claim 5, characterized in that: The top block and the two diagonal bracing legs are provided with through holes on their corresponding outer surfaces.

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