A mine wheel rim step-by-step cooling low-pressure casting mold

Abstract

The application discloses a mine wheel rim step-by-step cooling low-pressure casting mold and belongs to the technical field of rim casting. The mold comprises an upper mold, a lower mold and two side molds. The gap between the upper mold, the lower mold and the side molds forms a mold cavity. A pouring opening is arranged on one of the side molds. A plurality of annular grooves are arranged around the inside of the lower mold. A water inlet groove is further arranged in the inside of the lower mold. A plurality of connecting grooves are arranged on one side of the water inlet groove. A first cooling groove is arranged in the inside of the upper mold and corresponds to the annular groove. A second cooling groove is arranged in the inside of the lower mold and corresponds to the annular groove. 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 the water can enter the first cooling groove and the second cooling groove after passing through the annular groove, thereby cooling the edge of the rim, and avoiding cracks on the edge and the corner of the rim caused by the excessively fast cooling speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rim casting, more particularly to a mining vehicle rim step-by-step cooling low-pressure casting mold. BACKGROUND

[0002] In the production of mining vehicle wheels, the rim as a key load-bearing component directly affects the overall performance and safety of the vehicle. The traditional casting method often faces the problem of uneven cooling speed, especially in the casting process of large-tonnage mining vehicle rims. The rim edges and corners are prone to rapid cooling due to thickness changes, which may cause stress concentration in the material, leading to defects such as cracks and deformation, seriously affecting the service life and safety of the rim.

[0003] The traditional casting mold is difficult to control the temperature of different positions of the rim, and the cooling speed of each position is uneven. Therefore, the present application discloses a mining vehicle rim step-by-step cooling low-pressure casting mold. SUMMARY

[0004] In view of the problems existing in the prior art, the purpose of the present application is to provide a mining vehicle rim step-by-step cooling low-pressure casting mold.

[0005] To solve the above problems, the present application adopts the following technical solutions.

[0006] A mining vehicle rim step-by-step cooling low-pressure casting mold, comprising an upper mold, a lower mold, and two side molds, the gap between the upper mold, the lower mold, and the side molds forms a mold cavity, one of the side molds is provided with a pouring opening, the pouring opening is in communication with the inside of the mold cavity, a plurality of ring grooves are formed around the inside of the lower mold, a water inlet groove is also formed in the inside of the lower mold, a plurality of connecting grooves are formed on one side of the water inlet groove, and the ends of the connecting grooves away from the water inlet groove are in communication with the inside of the ring grooves.

[0007] A first cooling groove is formed in the inside of the upper mold corresponding to the position of the ring groove, a second cooling groove is formed in the inside of the lower mold corresponding to the position of the ring groove, a partition plate is fixedly installed in the inside of the ring groove, and a water inlet is formed in the end of the first cooling groove and the second cooling groove close to the ring groove.

[0008] A partition plate is fixedly installed in the inside of the ring groove, and the partition plate is located between the connecting groove and the water inlet.

[0009] Further, the first cooling groove is in communication with the inside of the plurality of ring grooves on the upper side through the water inlet, the second cooling groove is in communication with the inside of the plurality of ring grooves on the lower side through the water inlet, and the water inlet is located on one side of the connecting groove.

[0010] Further, the lower mold is internally provided with a rotating groove, a rotating block is rotatably installed in the rotating groove, and a water passing groove is formed through the rotating block, wherein the water passing groove is in an arc shape and gradually decreases in size from one end to the other end.

[0011] Further, a coil spring is fixedly installed on the upper side of the rotating block, one end of the coil spring is fixedly connected with the inner wall of the rotating groove, and the coil spring is used for pulling the rotating block to rotate.

[0012] Further, the rotating groove is provided with a piston groove on one side, the piston groove is in an arc shape, and a piston block is fixedly installed on one end of the outer wall of the rotating block and is in sliding connection with the inner wall of the piston groove.

[0013] Further, the piston groove is provided with a storage groove at one end, and the storage groove is internally filled with a thermal expansion liquid, wherein the thermal expansion liquid is expanded to push the piston block to move.

[0014] Further, a rotating rod is formed through the corresponding position of the second cooling groove in the storage groove, a threaded groove is formed in the outer wall of the rotating rod, balls are embedded in the corresponding position of the threaded groove of the lower mold, the outer wall of the balls is in extrusion contact with the inner wall of the threaded groove, a return spring is sleeved on the outer part of the rotating rod, the lower end of the return spring is in extrusion with the inner wall of the storage groove, the other end of the return spring is in extrusion with the rotating rod, and the return spring is used for pushing the rotating rod to rise.

[0015] Further, the upper end of the first cooling groove and the lower end of the second cooling groove are both provided with a water outlet, the lower end of the rotating rod corresponds to the position of the water outlet in the second cooling groove, a sleeve rod is slidably installed on the lower side of the rotating rod, and a sealing block is fixedly installed on the lower end of the sleeve rod, wherein the sealing block is in a fan shape, the water outlet in the second cooling groove is also in a fan shape, the size of the sealing block is greater than the size of the water outlet formed on the lower mold, the sealing block is used for sealing the water outlet, and the sleeve rod is rotatably installed in the second cooling groove.

[0016] Further, the lower mold is provided with a moving groove on the upper end of the outer side, a sealing plate is slidably installed in the moving groove, the lower end of the side close to the rotating block of the sealing plate is in an inclined structure, a compression spring is fixedly installed on the end away from the rotating block of the sealing plate, the other end of the compression spring is fixedly connected with the inner wall of the moving groove, the upper end of the second cooling groove is provided with a seepage outlet at the position corresponding to the inclined part of the sealing plate, and the seepage outlet is in communication with the inside of the moving groove.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] (1) The first cooling groove and the second cooling groove cooperate with the water inlet groove, the connecting groove and the ring-shaped groove to make the water pass through the ring-shaped groove and then enter the first cooling groove and the second cooling groove, so that the edge of the rim is cooled, and cracks at the edge and the corner of the rim caused by too fast cooling speed are avoided.

[0019] (2) The rotating block cooperates with the water passing groove to automatically adjust the water inlet amount with the change of temperature during the cooling process, so that the water flow speed is controlled, the cooling speed is controlled at different stages of cooling, the temperature is quickly reduced at the initial cooling stage to control the solidification time, the cooling rate is slowed down at the middle cooling stage to promote grain refinement, and the entire casting is uniformly cooled at the late cooling stage to avoid deformation and stress concentration caused by temperature difference. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the overall structure of the present application;

[0021] Figure 2 is a schematic diagram of the model cavity part structure of the present application;

[0022] Figure 3 is a schematic diagram of the ring-shaped groove part structure of the present application;

[0023] Figure 4 is a schematic diagram of the rotating block and the storage groove part structure of the present application;

[0024] Figure 5 is a schematic diagram of the water passing groove and the coil spring part structure of the present application;

[0025] Figure 6 is a schematic diagram of the internal structure of the second cooling groove of the present application;

[0026] Figure 7 is a schematic diagram of the sleeve rod and the rotating rod part structure of the present application.

[0027] Explanation of reference numerals in the drawing:

[0028] 1, upper mold; 101, first cooling groove; 102, water outlet;

[0029] 2, lower mold; 201, ring-shaped groove; 202, water inlet groove; 203, connecting groove; 204, second cooling groove; 205, water passing opening; 206, partition plate; 207, ball; 208, moving groove; 209, sealing plate; 210, compression spring; 211, permeation outlet;

[0030] 3, side mold;

[0031] 4, model cavity;

[0032] 5, rotating groove; 501, rotating block; 502, water channel; 503, coil spring; 504, piston groove; 505, piston block; 506, storage groove;

[0033] 6, rotating rod; 601, threaded groove; 602, reset spring; 603, sleeve rod; 604, sealing block. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without creative labor on the basis of the embodiments in the present application belong to the protection scope of the present application.

[0035] Please refer to Figures 1 to 7 A mine wheel rim step-by-step cooling low-pressure casting mold, comprising an upper mold 1, a lower mold 2 and two side molds 3, a 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 is provided with a pouring opening, the pouring opening is in communication with the inside of the mold cavity 4, a plurality of annular grooves 201 are formed around the inside of the lower mold 2, a water inlet groove 202 is also formed in the inside of the lower mold 2, a plurality of connecting grooves 203 are formed on one side of the water inlet groove 202, and the ends of the connecting grooves 203 away from the water inlet groove 202 are in communication with the inside of the annular grooves 201.

[0036] A first cooling groove 101 is formed in the inside of the upper mold 1 corresponding to the annular grooves 201, a second cooling groove 204 is formed in the inside of the lower mold 2 corresponding to the annular grooves 201, a partition plate 206 is fixedly installed in the inside of the annular grooves 201, a water inlet 205 is formed in the end of the first cooling groove 101 and the second cooling groove 204 close to the annular grooves 201, the water inlet 205 is used for guiding the water in the annular grooves 201 into the first cooling groove 101 and the second cooling groove 204, the partition plate 206 is fixedly installed in the inside of the annular grooves 201, the partition plate 206 is located between the connecting grooves 203 and the water inlets 205, the first cooling groove 101 is in communication with the inside of the plurality of annular grooves 201 on the upper side through the water inlets 205, the second cooling groove 204 is in communication with the inside of the plurality of annular grooves 201 on the lower side through the water inlets 205, and the water inlets 205 are located on one side of the connecting grooves 203.

[0037] By adopting the technical scheme, when in use, after the lower mold 2 is fixed, the two side molds 3 are installed on the lower mold 2, then the upper mold 1 is installed on the upper ends of the two side molds 3, then the molten metal material is slowly poured into the mold cavity 4 through the pouring opening, at this time, the staff connects the external water supply device with the water inlet groove 202, pours the water for cooling into the water inlet groove 202, and then makes the water enter the ring-shaped groove 201 through the connecting groove 203, when the water flows in the ring-shaped groove 201, the water can flow to the other side of the partition plate 206 and flow into the first cooling groove 101 and the second cooling groove 204 through the water inlet opening 205, so that the bending part and the thinner part of the rim are cooled.

[0038] The lower side of the lower mold 2 is provided with a rotating groove 5, and a rotating block 501 is rotatably installed in the rotating groove 5; a water passing groove 502 is arranged through the rotating block 501, the water passing groove 502 is in an arc shape, and the size of the water passing groove 502 gradually decreases from one end to the other end.

[0039] A coil spring 503 is fixedly installed on the outer wall of the upper side of the rotating block 501, and the end of the coil spring 503 away from the rotating block 501 is fixedly connected with the inner wall of the rotating groove 5; the coil spring 503 is used for pulling the rotating block 501 to rotate.

[0040] A piston groove 504 is arranged on one side of the rotating groove 5, and the piston groove 504 is in an arc shape; a piston block 505 is fixedly installed on the outer wall of the rotating block 501, and the piston block 505 is slidably connected with the inner wall of the piston groove 504; a storage groove 506 is arranged at one end of the piston groove 504, and a thermal expansion liquid is arranged in the storage groove 506; the thermal expansion liquid expands to push the piston block 505 to move.

[0041] By adopting the above technical scheme, after the molten material is poured into the mold cavity 4, the heat of the material is transferred to the lower mold 2, at this time, the thermal expansion liquid in the storage groove 506 on the lower mold 2 expands, and when the thermal expansion liquid expands, the piston block 505 is pushed to move, so that the rotating block 501 rotates, at this time, the side with the largest size of the water passing groove 502 corresponds to the position of the water inlet groove 202, when the temperature of the material gradually decreases, the temperature of the lower mold 2 also gradually decreases, at this time, the coil spring 503 can pull the rotating block 501 to rotate, at this time, the rotating block 501 rotates to make other positions of the water passing groove 502 correspond to the position of the water inlet groove 202, and the water passing groove 502 corresponds to the position of the water inlet groove 202 in the rotating process, when the part with smaller size of the water passing groove 502 corresponds to the position of the water inlet groove 202, the amount of water entering the water inlet groove 202 decreases.

[0042] The rotating rod 6 is provided through the position corresponding to the second cooling tank 204 inside the storage tank 506, the threaded groove 601 is formed on the outer wall of the rotating rod 6, the ball 207 is embedded in the position corresponding to the threaded groove 601 of the lower mold 2, the outer wall of the ball 207 is in extrusion contact with the inner wall of the threaded groove 601, the reset spring 602 is sleeved outside the rotating rod 6, the lower end of the reset spring 602 extrudes the inner wall of the storage tank 506, and the other end of the reset spring 602 extrudes the rotating rod 6, and the reset spring 602 is used to push the rotating rod 6 upwards;

[0043] The water outlet 102 is formed on the upper end of the first cooling tank 101 and the lower end of the second cooling tank 204, the lower end of the rotating rod 6 corresponds to the position of the water outlet 102 in the second cooling tank 204, the sleeve rod 603 is slidably installed on the lower side of the rotating rod 6, and the sealing block 604 is fixedly installed on the lower end of the sleeve rod 603, the sealing block 604 is in a fan-shaped structure, the water outlet 102 in the second cooling tank 204 is also in a fan-shaped structure, and the size of the sealing block 604 is greater than the size of the water outlet 102 formed 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 in the second cooling tank 204.

[0044] By adopting the above technical scheme, when the thermal expansion liquid expands, the thermal expansion liquid can push the rotating rod 6 to make the rotating rod 6 descend, when the rotating rod 6 descends, the inner wall of the threaded groove 601 can extrude the outer wall of the ball 207, at this time, the rotating rod 6 can be rotated under the reaction force of the extrusion force, when the rotating rod 6 rotates, the sleeve rod 603 connected with the rotating rod 6 in sliding mode can be rotated, when the sleeve rod 603 rotates, the sealing block 604 at the lower end of the sleeve rod 603 can be rotated, after the sealing block 604 rotates, the water outlet 102 can be opened, wherein when the thermal expansion liquid shrinks, the rotating rod 6 can be extruded by the reset spring 602 to ascend, after the rotating rod 6 ascends, the rotating rod 6 can be reversely rotated under the action of the threaded groove 601 and the ball 207, at this time, the sleeve rod 603 can be synchronously rotated with the rotating rod 6, when the sleeve rod 603 rotates, the sealing block 604 at the lower end of the sleeve rod 603 can block the water outlet 102, and then water will continue to flow into the second cooling tank 204.

[0045] The lower die 2 is provided with a moving groove 208 at the upper end of the outer side, a sealing plate 209 is slidably installed in the moving groove 208, the lower end of the side of the sealing plate 209 close to the rotating block 501 is in an inclined structure, 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 with the inner wall of the moving groove 208, the upper end of the second cooling groove 204 is provided with a seepage outlet 211 at the position corresponding to the upper inclined part of the sealing plate 209, the seepage outlet 211 is communicated with the inside of the moving groove 208, and the compression spring 210 is used for extruding the sealing plate 209, when the water does not extrude the inclined part on the sealing plate 209, the compression spring 210 can extrude the sealing plate 209 to block the upper side of the seepage outlet 211.

[0046] By adopting the above technical scheme, when the water outlet 102 is blocked, the water flowing into the second cooling groove 204 can enter the inside of the seepage outlet 211, then the water can extrude the inside of the moving groove 208 and the inclined part at the lower end of the sealing plate 209, at this time, the sealing plate 209 can move in the moving groove 208 under the decomposing force of the extruding force, when the sealing plate 209 moves, it no longer blocks the seepage 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 die 1, the lower die 2 and the side die 3, so that the formed rim is more easily separated from the upper die 1, the lower die 2 and the side die 3.

[0047] Method for use: when used, the molten material is injected into the mold cavity 4, the heat of the material is conducted to the thermal expansion liquid, the thermal expansion liquid pushes the piston block 505 to move to make the rotating block 501 rotate, and with the change of temperature, the position corresponding to the water inlet groove 202 and the water inlet groove 502 is adjusted, so that the cooling speed can be controlled at different cooling stages, and after the water enters the first cooling groove 101 and the second cooling groove 204, the rim edge can be cooled, because the water flows out of the ring-shaped groove 201, the heat in the water has risen, therefore, after the water enters the first cooling groove 101 and the second cooling groove 204, it can only take away less heat, so that the cooling speed of the rim edge can be avoided to be too fast to cause the increase of brittleness and stress concentration at the weak part, so as to avoid cracks.

[0048] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme of the present application and the improvement concept thereof within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A step-by-step cooling low-pressure casting mold for a mining wheel rim, comprising 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) forming a mold cavity (4), and one of the side molds (3) being provided with a pouring opening, the pouring opening being in communication with the interior of the mold cavity (4), characterized in that: A plurality of annular grooves (201) are arranged around the inner side of the lower mold (2), and a water inlet groove (202) is also arranged in the inner side of the lower mold (2), a plurality of connecting grooves (203) are arranged on one side of the water inlet groove (202), and the ends of the connecting grooves (203) away from the water inlet groove (202) are in communication with the inner sides of the annular grooves (201); ​ A first cooling groove (101) is arranged in the inner side of the upper mold (1) corresponding to the annular grooves (201), a second cooling groove (204) is arranged in the inner side of the lower mold (2) corresponding to the annular grooves (201), a partition plate (206) is fixedly installed in the inner side of each annular groove (201), and the ends of the first cooling groove (101) and the second cooling groove (204) close to the annular grooves (201) are each provided with a water inlet (205) for guiding the water in the annular grooves (201) into the first cooling groove (101) and the second cooling groove (204); The partition plate (206) is fixedly installed in the inner side of the annular groove (201) and located between the connecting groove (203) and the water inlet (205); The first cooling groove (101) is in communication with the inner sides of the plurality of annular grooves (201) on the upper side through the water inlets (205), the second cooling groove (204) is in communication with the inner sides of the plurality of annular grooves (201) on the lower side through the water inlets (205), and the water inlets (205) are located on one side of the connecting grooves (203); A rotating groove (5) is arranged in the inner side of the lower mold (2), a rotating block (501) is rotatably installed in the inner side of the rotating groove (5), a water inlet groove (502) is arranged through the rotating block (501), the water inlet groove (502) has an arc-shaped structure, and the size of the water inlet groove (502) gradually decreases from one end to the other end; A coil spring (503) is fixedly installed on the outer wall of the upper side of the rotating block (501), one end of the coil spring (503) away from the rotating block (501) is fixedly connected with the inner wall of the rotating groove (5), and the coil spring (503) is used for pulling the rotating block (501) to rotate; A piston groove (504) is arranged 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), and the piston block (505) is slidably connected with the inner wall of the piston groove (504); One end of the piston groove (504) is provided with a storage groove (506), and the storage groove (506) is filled with a heat-expanding liquid, and the heat-expanding liquid expands to push the piston block (505) to move.

2. A mine wheel rim step cooling low pressure casting mold according to claim 1, characterized in that: The rotating rod (6) is provided with a threaded groove (601) on the outer wall, the lower mold (2) is embedded with a ball (207) at the position corresponding to the threaded groove (601), the outer wall of the ball (207) is in extrusion contact with the inner wall of the threaded groove (601), the rotating rod (6) is externally sleeved with a reset spring (602), the lower end of the reset spring (602) extrudes the inner wall of the storage tank (506), and the other end of the reset spring (602) extrudes the rotating rod (6), and the reset spring (602) is used for pushing the rotating rod (6) upwards.

3. A progressive cooling low pressure casting mold for a mine wheel rim according to claim 2, characterized in that: The first cooling tank (101) and the second cooling tank (204) are both provided with a water outlet (102) at the upper end, the lower end of the rotating rod (6) corresponds to the position of the water outlet (102) in the second cooling tank (204), the lower end of the rotating rod (6) is externally sleeved with a sleeve rod (603), and the lower end of the sleeve rod (603) is fixedly provided with a sealing block (604), the sealing block (604) is in a fan-shaped structure, the water outlet (102) in the second cooling tank (204) is also in a fan-shaped structure, and the size of the sealing block (604) is greater than the size of the water outlet (102) provided on the lower mold (2), the sealing block (604) is used for sealing the water outlet (102), and the sleeve rod (603) is rotatably installed in the second cooling tank (204).

4. A progressive cooling low pressure casting mold for a mine wheel rim according to claim 3, characterized in that: The lower mold (2) is provided with a moving groove (208) on the outer side of the upper end, the moving groove (208) is internally slidably provided with a sealing plate (209), the lower end of the side close to the rotating block (501) of the sealing plate (209) is in an inclined structure, and the end away from the rotating block (501) of the sealing plate (209) is fixedly provided with a compression spring (210), the other end of the compression spring (210) is fixedly connected with the inner wall of the moving groove (208), the second cooling tank (204) is provided with a permeation outlet (211) at the position corresponding to the upper inclined part of the sealing plate (209), and the permeation outlet (211) is in communication with the inside of the moving groove (208).

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