Mine truck rim step-by-step cooling low-pressure casting mold

Abstract

The invention discloses a mine truck rim step-by-step cooling low-pressure casting mold, and belongs to the technical field of rim casting, the mine truck rim step-by-step cooling low-pressure casting mold comprises an upper mold, a lower mold and two side molds, gaps among the upper mold, the lower mold and the side molds form a mold cavity, one of the side molds is provided with a pouring port, the periphery of the interior of the lower mold is provided with a plurality of annular grooves, and the annular grooves are communicated with the mold cavity. A water inlet groove is further formed in the lower mold, a plurality of connecting grooves are formed in one side of the water inlet groove, a first cooling groove is formed in the position, corresponding to the annular groove, in the upper mold, and a second cooling groove is formed in the position, corresponding to the annular groove, in the lower mold. According to the rim cooling device, the first cooling groove and the second cooling groove are matched with the water inlet groove, the connecting groove and the annular groove so that water can enter the first cooling groove and the second cooling groove after passing through the annular groove, and therefore the edge of a rim is cooled, and the situation that cracks appear on the edge and corners of the rim due to the too high cooling speed is avoided.

Description

Technical Field

[0001] This invention relates to the field of wheel rim casting technology, and more specifically, to a low-pressure casting mold for step-by-step cooling of mining wheel rims. Background Technology

[0002] In the production of mining wheels, the rim is a key load-bearing component, and its casting quality directly affects the overall performance and safety of the vehicle. Traditional casting methods often face the problem of uneven cooling rate. Especially in the casting process of large-tonnage mining wheel rims, the edges and corners of the rim are prone to excessively rapid cooling due to thickness variations. This rapid cooling may cause stress concentration inside the material, leading to defects such as cracks and deformation, which seriously affects the service life and safety of the rim.

[0003] Traditional casting molds are difficult to control the temperature at different locations on the wheel rim during use, resulting in uneven cooling rates at various locations. Therefore, this invention discloses a low-pressure casting mold for step-by-step cooling of mining wheel rims. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A step-cooling low-pressure casting mold for mining vehicle wheel rims includes an upper mold, a lower mold, and two side molds. The gap between the upper mold, lower mold, and side molds forms a mold cavity. One of the side molds has a pouring port that communicates with the inside of the mold cavity. The lower mold has multiple annular grooves around its interior and a water inlet groove inside. The water inlet groove has multiple connecting grooves on one side, and the end of the connecting groove away from the water inlet groove communicates with the inside of the annular groove. The upper mold has a first cooling groove at the position corresponding to the annular groove, and the lower mold has a second cooling groove at the position corresponding to the annular groove. A partition is fixedly installed inside the annular groove. A water inlet is opened at the end of the first cooling groove and the second cooling groove near the annular groove. The water inlet is used to guide water in the annular groove into the first cooling groove and the second cooling groove. A baffle is fixedly installed inside the annular groove, and the baffle is located between the connecting groove and the water inlet.

[0007] Furthermore, the first cooling tank is connected to the interior of multiple annular grooves located on the upper side via a water inlet, and the second cooling tank is connected to the interior of multiple annular grooves located on the lower side via a water inlet, with the water inlet located on one side of the connecting groove.

[0008] Furthermore, a rotating groove is provided on the lower side of the lower mold, and a rotating block is rotatably installed inside the rotating groove. A water passage groove is provided through the rotating block. The water passage groove has an arc-shaped structure, and the size of the water passage groove gradually decreases from one end to the other.

[0009] Furthermore, a coil spring is fixedly installed on the upper outer wall of the rotating block, and the end of the coil spring away from the rotating block is fixedly connected to the inner wall of the rotating groove. The coil spring is used to pull the rotating block to rotate.

[0010] Furthermore, a piston groove is provided on one side of the rotating groove. The piston groove has an arc-shaped structure. A piston block is fixedly installed at one end of the outer wall of the rotating block. The piston block is slidably connected to the inner wall of the piston groove.

[0011] Furthermore, a storage tank is provided at one end of the piston groove, and the storage tank is filled with thermally expanding liquid. The expansion of the thermally expanding liquid pushes the piston block to move.

[0012] Furthermore, a rotating rod is provided through the storage tank at a position corresponding to the second cooling tank. A threaded groove is provided on the outer wall of the rotating rod. A ball is embedded in the lower mold at a position corresponding to the threaded groove. The outer wall of the ball is in contact with the inner wall of the threaded groove. A return spring is sleeved on the outside of the rotating rod. The lower end of the return spring presses against the inner wall of the storage tank, and the other end of the return spring presses against the rotating rod. The return spring is used to push the rotating rod upward.

[0013] Furthermore, both the upper end of the first cooling tank and the lower end of the second cooling tank are provided with water outlets. The lower end of the rotating rod corresponds to the position of the water outlet in the second cooling tank. A sleeve rod is slidably installed on the lower side of the rotating rod, and a sealing block is fixedly installed at the lower end of the sleeve rod. The sealing block has a fan-shaped structure, and the water outlet in the second cooling tank also has a fan-shaped structure. The size of the sealing block is larger than the size of the water outlet on the lower mold. The sealing block is used to seal the water outlet, and the sleeve rod is rotatably installed inside the second cooling tank.

[0014] Furthermore, a movable groove is provided on the upper outer side of the lower mold, and a sealing plate is slidably installed inside the movable groove. The lower end of the sealing plate near the rotating block is inclined, and a compression spring is fixedly installed on the end of the sealing plate away from the rotating block. The other end of the compression spring is fixedly connected to the inner wall of the movable groove. An outlet is provided at the upper end of the second cooling groove at a position corresponding to the inclined part of the sealing plate, and the outlet communicates with the inside of the movable groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention, by setting a first cooling tank and a second cooling tank in conjunction with a water inlet tank, a connecting tank and an annular tank, enables water to enter the first cooling tank and the second cooling tank after passing through the annular tank, thereby cooling the edge of the wheel rim and avoiding cracks at the edge and corner of the wheel rim due to excessive cooling speed.

[0016] (2) The present invention can automatically adjust the water flow rate as the temperature changes during the cooling process by setting a rotating block in conjunction with a water channel, thereby controlling the water flow rate and controlling the cooling speed at different stages of cooling. In the early stage of cooling, the temperature is rapidly reduced to control the solidification time. In the middle stage of cooling, the cooling rate is slowed down to promote grain refinement. In the later stage of cooling, the entire casting is cooled evenly to avoid deformation and stress concentration caused by temperature difference. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cavity structure of the present invention; Figure 3 This is a schematic diagram of the annular groove portion of the present invention; Figure 4 This is a schematic diagram of the rotating block and storage tank of the present invention; Figure 5 This is a schematic diagram of the water channel and coil spring of the present invention; Figure 6 This is a schematic diagram of the internal structure of the second cooling tank of the present invention; Figure 7 This is a schematic diagram of the sleeve and rotating rod structure of the present invention.

[0018] Explanation of the labels in the diagram: 1. Upper mold; 101. First cooling tank; 102. Water outlet; 2. Lower mold; 201. Annular groove; 202. Water inlet groove; 203. Connecting groove; 204. Second cooling groove; 205. Water outlet; 206. Partition plate; 207. Ball bearing; 208. Moving groove; 209. Sealing plate; 210. Compression spring; 211. Exudate outlet; 3. Side mold; 4. Model cavity; 5. Rotating groove; 501. Rotating block; 502. Water passage groove; 503. Coil spring; 504. Piston groove; 505. Piston block; 506. Storage groove; 6. Rotating rod; 601. Threaded groove; 602. Return spring; 603. Sleeve rod; 604. Sealing block. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 7 A step-by-step cooling low-pressure casting mold for mining vehicle wheel rims includes an upper mold 1, a lower mold 2, and two side molds 3. The gap between the upper mold 1, the lower mold 2, and the side molds 3 forms a mold cavity 4. One of the side molds 3 has a pouring port that communicates with the interior of the mold cavity 4. The lower mold 2 has multiple annular grooves 201 around its interior and a water inlet groove 202 inside. The water inlet groove 202 has multiple connecting grooves 203 on one side, and the end of the connecting groove 203 away from the water inlet groove 202 communicates with the interior of the annular groove 201. A first cooling groove 101 is provided inside the upper mold 1 at a position corresponding to the annular groove 201, and a second cooling groove 204 is provided inside the lower mold 2 at a position corresponding to the annular groove 201. A partition 206 is fixedly installed inside the annular groove 201. A water inlet 205 is provided at one end of the first cooling groove 101 and the second cooling groove 204 near the annular groove 201. The water inlet 205 is used to guide water in the annular groove 201 into the first cooling groove 101 and the second cooling groove 204. The partition 206 is fixedly installed inside the annular groove 201 and is located between the connecting groove 203 and the water inlet 205. The first cooling groove 101 is connected to the interior of multiple annular grooves 201 located on the upper side through the water inlet 205, and the second cooling groove 204 is connected to the interior of multiple annular grooves 201 located on the lower side through the water inlet 205. The water inlet 205 is located on one side of the connecting groove 203.

[0021] By adopting the above technical solution, when using the device, after fixing the lower mold 2, the two side molds 3 are installed on the lower mold 2, and then the upper mold 1 is installed on the upper end of the two side molds 3. Then, the molten metal material is slowly injected into the mold cavity 4 through the pouring port. At this time, the operator connects the external water supply equipment to the water inlet tank 202 and injects water for cooling into the water inlet tank 202. Then, the water enters the annular groove 201 through the connecting groove 203. When the water flows inside the annular groove 201, it can flow to the other side of the partition 206 and flow into the first cooling tank 101 and the second cooling tank 204 through the water outlet 205, thereby cooling the bent part and the thinner part of the rim.

[0022] A rotating groove 5 is provided on the lower side of the lower mold 2. A rotating block 501 is rotatably installed inside the rotating groove 5. A water passage groove 502 is provided through the rotating block 501. The water passage groove 502 has an arc-shaped structure, and the size of the water passage groove 502 gradually decreases from one end to the other. A coil spring 503 is fixedly installed on the upper outer wall of the rotating block 501. The end of the coil spring 503 away from the rotating block 501 is fixedly connected to the inner wall of the rotating groove 5. The coil spring 503 is used to pull the rotating block 501 to rotate. A piston groove 504 is provided on one side of the rotating groove 5. The piston groove 504 has an arc-shaped structure. A piston block 505 is fixedly installed on one end of the outer wall of the rotating block 501. The piston block 505 is slidably connected to the inner wall of the piston groove 504. A storage groove 506 is provided on one end of the piston groove 504. The storage groove 506 is filled with thermally expanding liquid. The thermally expanding liquid expands and pushes the piston block 505 to move.

[0023] By adopting the above technical solution, after the molten material is injected into the mold cavity 4, the heat of the material will be transferred to the lower mold 2. At this time, the thermal expansion liquid in the storage tank 506 on the lower mold 2 will expand. Since the storage tank 506 is connected to the piston tank 504, when the thermal expansion liquid expands, it can push the piston block 505 to move, thereby causing the rotating block 501 to rotate. At this time, the side with the largest size of the water channel 502 corresponds to the position of the water inlet tank 202. When the material temperature gradually decreases, the temperature of the lower mold 2 will also gradually decrease. At this time, the coil spring 503 can pull the rotating block 501 to rotate. After the rotating block 501 rotates, it can make the other positions of the water channel 502 correspond to the position of the water inlet tank 202. During this rotation, the smaller size of the water channel 502 will correspond to the position of the water inlet tank 202. When the smaller size of the water channel 502 corresponds to the position of the water inlet tank 202, the amount of water entering the water inlet tank 202 will decrease.

[0024] A rotating rod 6 is installed inside the storage tank 506 at a position corresponding to the second cooling tank 204. A threaded groove 601 is provided on the outer wall of the rotating rod 6. A ball bearing 207 is embedded in the lower mold 2 at a position corresponding to the threaded groove 601. The outer wall of the ball bearing 207 is in contact with the inner wall of the threaded groove 601. A return spring 602 is sleeved on the outside of the rotating rod 6. The lower end of the return spring 602 presses against the inner wall of the storage tank 506, and the other end of the return spring 602 presses against the rotating rod 6. The return spring 602 is used to push the rotating rod 6 upward. Both the upper end of the first cooling tank 101 and the lower end of the second cooling tank 204 are provided with water outlets 102. The lower end of the rotating rod 6 corresponds to the position of the water outlet 102 in the second cooling tank 204. A sleeve rod 603 is slidably installed on the lower side of the rotating rod 6, and a sealing block 604 is fixedly installed on the lower end of the sleeve rod 603. The sealing block 604 has a fan-shaped structure. The water outlet 102 in the second cooling tank 204 also has a fan-shaped structure. The size of the sealing block 604 is larger than the size of the water outlet 102 opened on the lower mold 2. The sealing block 604 is used to seal the water outlet 102, and the sleeve rod 603 is rotatably installed inside the second cooling tank 204.

[0025] By adopting the above technical solution, when the thermally expanding liquid expands, it can push the rotating rod 6, causing the rotating rod 6 to descend. When the rotating rod 6 descends, the inner wall of the threaded groove 601 can squeeze the outer wall of the ball 207. At this time, under the reaction force of the squeezing force, the rotating rod 6 can rotate. When the rotating rod 6 rotates, it can drive the sleeve rod 603 slidably connected to it to rotate. When the sleeve rod 603 rotates, it can drive the sealing block 604 at its lower end to rotate. After the sealing block 604 rotates, the water outlet 102 can be opened. When the thermally expanding liquid contracts, the return spring 602 squeezes the rotating rod 6, causing the rotating rod 6 to rise. After the rotating rod 6 rises, it can rotate in the opposite direction under the action of the threaded groove 601 and the ball 207. At this time, the sleeve rod 603 can rotate synchronously with the rotating rod 6. When the sleeve rod 603 rotates, the sealing block 604 at its lower end can block the water outlet 102. After that, the water will continue to flow into the second cooling tank 204.

[0026] A movable groove 208 is provided on the upper outer side of the lower mold 2. A sealing plate 209 is slidably installed inside the movable groove 208. The lower end of the sealing plate 209 near the rotating block 501 is inclined. A compression spring 210 is fixedly installed on the end of the sealing plate 209 away from the rotating block 501. The other end of the compression spring 210 is fixedly connected to the inner wall of the movable groove 208. An outlet 211 is provided on the upper end of the second cooling groove 204 at a position corresponding to the inclined part on the sealing plate 209. The outlet 211 communicates with the inside of the movable groove 208. The compression spring 210 is used to squeeze the sealing plate 209. When the water does not squeeze the inclined part on the sealing plate 209, the compression spring 210 can squeeze the sealing plate 209 to block the outlet 211.

[0027] By adopting the above technical solution, when the outlet 102 is blocked, the water continues to flow into the second cooling tank 204 and can enter the infiltration outlet 211. Then, the water can squeeze the inside of the moving tank 208 and squeeze the inclined part at the lower end of the sealing plate 209. At this time, under the action of the decomposition force of the squeezing force, the sealing plate 209 can move in the moving tank 208. When the sealing plate 209 moves, it no longer blocks the infiltration outlet 211. At this time, the water can enter the mold cavity 4 and flow along the gap between the formed rim and the upper mold 1, lower mold 2, and side mold 3, making it easier for the formed rim to separate from the upper mold 1, lower mold 2, and side mold 3.

[0028] Instructions for use: When using, inject the molten material into the mold cavity 4. The heat of the material is conducted to the thermal expansion liquid, which pushes the piston block 505 to move, causing the rotating block 501 to rotate. As the temperature changes, adjust the corresponding positions of the water inlet 202 and the water outlet 502 to control the cooling rate at different cooling stages. At the same time, after the water enters the first cooling tank 101 and the second cooling tank 204, it can cool the edge of the rim. Since the water flows out from the annular groove 201, the water has already risen in temperature. Therefore, the water can only carry away a small amount of heat after entering the first cooling tank 101 and the second cooling tank 204. This can prevent the rim edge from cooling too quickly, which would increase the brittleness of the weak point and cause stress concentration, thus avoiding cracks.

[0029] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A step-by-step cooling low-pressure casting mold for mining vehicle wheel rims, comprising an upper mold (1), a lower mold (2), and two side molds (3), wherein the gap between the upper mold (1), the lower mold (2), and the side molds (3) forms a mold cavity (4), and one of the side molds (3) has a pouring port that communicates with the interior of the mold cavity (4), characterized in that: The lower mold (2) has multiple annular grooves (201) around its interior. The lower mold (2) also has a water inlet groove (202) inside. Multiple connecting grooves (203) are provided on one side of the water inlet groove (202), and the end of the connecting groove (203) away from the water inlet groove (202) is connected to the interior of the annular groove (201). The upper mold (1) has a first cooling groove (101) at the position corresponding to the annular groove (201) inside, and the lower mold (2) has a second cooling groove (204) at the position corresponding to the annular groove (201) inside. The annular groove (201) is fixedly installed with a partition plate (206). The first cooling groove (101) and the second cooling groove (204) are both provided with a water inlet (205) at one end near the annular groove (201). The water inlet (205) is used to guide the water in the annular groove (201) into the first cooling groove (101) and the second cooling groove (204). A baffle (206) is fixedly installed inside the annular groove (201), and the baffle (206) is located between the connecting groove (203) and the water inlet (205).

2. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 1, characterized in that: The first cooling tank (101) is connected to the interior of a plurality of annular grooves (201) located on the upper side through a water inlet (205), and the second cooling tank (204) is connected to the interior of a plurality of annular grooves (201) located on the lower side through a water inlet (205). The water inlet (205) is located on one side of the connecting groove (203).

3. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 2, characterized in that: The lower mold (2) has a rotating groove (5) on its lower side. A rotating block (501) is rotatably installed inside the rotating groove (5). A water channel (502) is provided through the rotating block (501). The water channel (502) has an arc-shaped structure and the size of the water channel (502) gradually decreases from one end to the other.

4. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 3, characterized in that: A coil spring (503) is fixedly installed on the upper outer wall of the rotating block (501). The end of the coil spring (503) away from the rotating block (501) is fixedly connected to the inner wall of the rotating groove (5). The coil spring (503) is used to pull the rotating block (501) to rotate.

5. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 4, characterized in that: A piston groove (504) is provided on one side of the rotating groove (5). The piston groove (504) has an arc-shaped structure. A piston block (505) is fixedly installed on one end of the outer wall of the rotating block (501). The piston block (505) is slidably connected to the inner wall of the piston groove (504).

6. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 5, characterized in that: The piston groove (504) has a storage tank (506) at one end. The storage tank (506) is filled with thermally expanding liquid. The thermally expanding liquid expands and pushes the piston block (505) to move.

7. A low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 6, characterized in that: A rotating rod (6) is provided inside the storage tank (506) at a position corresponding to the second cooling tank (204). A threaded groove (601) is provided on the outer wall of the rotating rod (6). A ball (207) is embedded in the lower mold (2) at a position corresponding to the threaded groove (601). The outer wall of the ball (207) is in contact with the inner wall of the threaded groove (601). A return spring (602) is sleeved on the outside of the rotating rod (6). The lower end of the return spring (602) presses against the inner wall of the storage tank (506), and the other end of the return spring (602) presses against the rotating rod (6). The return spring (602) is used to push the rotating rod (6) to rise.

8. The low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 7, characterized in that: The first cooling tank (101) and the second cooling tank (204) are both provided with water outlets (102). The lower end of the rotating rod (6) corresponds to the position of the water outlet (102) in the second cooling tank (204). A sleeve rod (603) is slidably installed on the lower side of the rotating rod (6), and a sealing block (604) is fixedly installed on the lower end of the sleeve rod (603). The sealing block (604) has a fan-shaped structure. The water outlet (102) in the second cooling tank (204) also has a fan-shaped structure. The size of the sealing block (604) is larger than the size of the water outlet (102) opened on the lower mold (2). The sealing block (604) is used to seal the water outlet (102), and the sleeve rod (603) is rotatably installed inside the second cooling tank (204).

9. A low-pressure casting mold for step-by-step cooling of mining vehicle wheel rims according to claim 8, characterized in that: The lower mold (2) has a moving groove (208) on its upper outer side. A sealing plate (209) is slidably installed inside the moving groove (208). The lower end of the sealing plate (209) near the rotating block (501) is inclined. A compression spring (210) is fixedly installed at the end of the sealing plate (209) away from the rotating block (501). The other end of the compression spring (210) is fixedly connected to the inner wall of the moving groove (208). An outlet (211) is opened at the upper end of the second cooling groove (204) at the position corresponding to the inclined part on the sealing plate (209). The outlet (211) is connected to the inside of the moving groove (208).

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