Automatic die changing device for casting axle housing

Abstract

The utility model provides an automatic mould changing device for casting an axle housing, which comprises a mounting rack, a pair of parallel conveying tracks are transversely and fixedly mounted on the mounting rack, a plurality of rollers are mounted on opposite side walls of the pair of conveying tracks at intervals, and the plurality of rollers are used for conveying a plurality of sand boxes at intervals. A pair of operating tables is fixedly mounted at the bottom of the mounting frame, a sliding plate capable of moving longitudinally is mounted on each operating table, and a pair of lower dies are transversely placed on the sliding plates and move to the positions corresponding to the sand boxes through the sliding plates. According to the device, casting of two sets of products can be freely switched, two sets of products can be produced at the same time through two times of molten iron in one furnace, the number of mold sand boxes is saved by 50%, the number of frequent mold replacement times can be reduced by simultaneous operation of two sets of four products, the manual mold replacement cost is saved by 50%, two sets of mold systems can guarantee non-stop operation of a production line, the cooling time for removing a sand shell can be saved in production, and the production efficiency is improved. The assembly line overall production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge shell casting, in particular to an automatic die changing device for casting bridge shells. Background Technique

[0002] The bridge shell is an assembly matrix for installing the main reducer, differential, half shaft, and wheels. Its main function is to support and protect the main reducer, differential, half shaft, etc. Usually, the ordinary non-disconnecting drive axle bridge shell is a rigid hollow beam supported on the left and right drive wheels. Transmission parts such as the main reducer, differential, and half shaft are all installed therein. The bridge shell is connected to the frame or carriage through longitudinally arranged leaf springs. It is not only an important part of the drive axle but also one of the main components of the running gear.

[0003] The bridge shell is formed by casting with a mold. The middle bridge and the rear bridge require two sets of molds for casting. However, currently, during the production of different bridge shell products, the mold switching is inconvenient, the number of sand boxes required is large, and the cost is high. Content of the Utility Model

[0004] In view of the above problems, the utility model provides an automatic die changing device for casting bridge shells. This device realizes the free switching between the casting of two sets of products. One furnace of two tons of molten iron can produce two sets of products simultaneously, saving 50% of the number of mold sand boxes. The simultaneous operation of two sets of four products can reduce the frequent die changing times and save 50% of the labor cost for manual die changing. The two sets of mold systems can ensure the continuous operation of the production line, save the cooling time for removing the sand shell during production, and improve the overall production efficiency of the production line.

[0005] To solve the above problems, the technical solution adopted by the utility model is as follows:

[0006] An automatic die changing device for casting bridge shells includes a mounting frame. A pair of parallel conveying tracks are horizontally and fixedly installed on the mounting frame. A plurality of rollers are spaced and installed on the opposite side walls of the pair of conveying tracks. The plurality of rollers are used for spacing and conveying a plurality of sand boxes. A pair of operation platforms are fixedly installed at the bottom of the mounting frame. A longitudinally movable sliding plate is installed on the operation platform. A pair of lower molds are horizontally placed on the sliding plate. The lower molds are moved to the corresponding sand box positions through the sliding plate. A pair of vertically movable sand shooting plates are installed at the inner top of the mounting frame. A pair of upper sand hoppers are fixedly installed at the top rear of the mounting frame. The pair of sand shooting plates are vertically moved to the positions below the corresponding upper sand hoppers to complete the sand filling process. A jacking assembly for jacking the corresponding lower mold is installed at the bottom of the operation platform. The jacking assembly is used to jack up the lower mold to close the mold with the corresponding sand box, and then make the sand box dock with the corresponding sand shooting plate. A plurality of sand shooting pipes are evenly distributed at the bottom of the sand shooting plates. A plurality of docking holes corresponding to the sand shooting pipes are evenly distributed at the top of the sand box. High-temperature resistant sealing rings are installed on the bottom side walls of the sand shooting pipes.

[0007] Preferably, chains extending along the length direction are installed on the side walls of a pair of the conveying tracks, a sprocket engaged with the chain is fixedly installed on the wheel axle of the roller, and the chain drives a plurality of sprockets to rotate synchronously.

[0008] Preferably, a pair of slide rails are longitudinally and fixedly installed on the operating table, and the slide plate is slidably installed on the pair of slide rails.

[0009] Preferably, a pair of first cylinders are fixedly installed at the front end of the operating table, the first cylinders are longitudinally arranged, and the telescopic ends are fixedly connected with the front end of the slide plate.

[0010] Preferably, flanges are fixedly installed on both the front and rear sides of the sand box, and the flanges are placed on a plurality of rollers on the corresponding side.

[0011] Preferably, the jacking assembly includes a hydraulic cylinder fixedly installed at the bottom of the operating table, the hydraulic cylinder is vertically arranged, jacking holes corresponding to the positions of a pair of lower dies are provided at the bottom of the slide plate, the telescopic end of the hydraulic cylinder passes through the corresponding jacking holes to jack up the lower die, vertical guide columns are fixedly installed at the four corners of the lower die on the slide plate, guide plates matched with the corresponding guide columns are fixedly installed at the four corners of the lower die, and limit nuts are threadedly connected to the tops of the guide columns.

[0012] Preferably, two pairs of longitudinally arranged guide rails are fixedly installed at the inner top of the mounting frame, each pair of guide rails corresponds to a sand shooting plate, a plurality of pulleys are rotatably connected to both the left and right sides of the sand shooting plate, the pulleys on both sides are placed on the guide rails on the corresponding side, a longitudinally arranged second cylinder is fixedly installed at the front side of the top of the mounting frame, the telescopic end of the second cylinder is movably connected with the front side of the sand shooting plate through a rubber connecting piece, and a plurality of abutting columns matched with the sand shooting plate are fixedly installed at the inner top of the mounting frame.

[0013] Preferably, a pair of docking pipes are fixedly installed at the top of the sand shooting plate, a pair of hopper openings are provided at the bottom of the upper sand hopper, and an upper sand cover is also fixedly installed. A pair of telescopic pipes docked with the corresponding hopper openings are installed in the upper sand cover, and valves are installed in the telescopic pipes.

[0014] Preferably, an air tank is installed at the top of the mounting frame, an air pump connected to the air tank is also installed, two pairs of air pipes are fixed at the inner top of the mounting frame, each pair of air pipes is matched with a corresponding pair of docking pipes, the air outlet end of the air pump is connected to the air pipes, and the docking pipes rise to dock with the corresponding air pipes.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The utility model is provided with a sliding plate, two pairs of lower dies, a pair of conveying tracks, multiple sets of sand boxes, a pair of sand shooting plates, an upper sand hopper and a jacking assembly. Two sets of sand boxes are conveyed to the casting station at intervals through a pair of conveying tracks. A pair of sand shooting plates longitudinally move below a pair of upper sand hoppers. Two pairs of telescopic pipes expand and contract to dock with two pairs of docking pipes, filling the sand shooting plates with sand. A pair of lower dies longitudinally move corresponding to a set of sand boxes. The lower dies are jacked up by the jacking assembly at the bottom, and continue to be jacked up after being clamped with the sand boxes, so that the sand boxes are docked with the sand shooting plates. Multiple sand shooting pipes are inserted into the docking holes at the top of the sand boxes. After the sand shooting plates, the sand boxes and the lower dies are in top contact, they continue to be jacked up by 2-4 cm, so that the docking pipes are docked with the air pipes. The air pump is started, and high-pressure gas can be pumped into the sand shooting plates, uniformly injecting the sand into the mold cavity. The heating assembly in the lower die is used to melt the sand to form a sand core and a sand shell. After forming, after the sand boxes and the lower dies descend and separate, the other pair of lower dies longitudinally move, and another set of sand boxes is synchronously conveyed to the casting station, realizing the free switching of the casting of two sets of products. One furnace of two tons of molten iron can produce two sets of products at the same time, saving 50% of the number of mold sand boxes. The simultaneous operation of two sets of four products can reduce the frequent mold change times and save 50% of the labor mold change cost. The two sets of mold systems can ensure the continuous operation of the production line, save the cooling time for removing the sand shell during production, and improve the overall production efficiency of the production line. Brief Description of the Drawings

[0017] Figure 1 is the front perspective view of the utility model;

[0018] Figure 2 is the rear perspective view of the utility model;

[0019] Figure 3 is the bottom perspective view of the utility model;

[0020] Figure 4 is the schematic diagram of the clamping state of the sand box and the lower die proposed by the utility model;

[0021] Figure 5 is the schematic diagram of the sand shooting plate structure proposed by the utility model.

[0022] In the figure: 1 mounting frame, 2 conveying track, 3 roller, 4 upper sand hopper, 5 operating table, 6 first cylinder, 7 slide rail, 8 sliding plate, 9 second cylinder, 10 sand shooting plate, 11 sand box, 12 lower die, 13 abutting column, 14 guide plate, 15 guide post, 16 limit nut, 17 upper sand cover, 18 telescopic pipe, 19 guide rail, 20 pulley, 21 docking hole, 22 docking pipe, 23 sand shooting pipe, 24 high-temperature resistant sealing ring, 25 hydraulic cylinder. Detailed Embodiment

[0023] In order to make the above - mentioned objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0025] Refer to Figures 1-5 , an automatic die - changing device for casting a bridge housing, which includes a mounting frame 1. A pair of parallel conveying tracks 2 are horizontally and fixedly installed on the mounting frame 1. A plurality of rollers 3 are spaced and installed on the opposite side walls of the pair of conveying tracks 2. The plurality of rollers 3 are used for intermittently conveying a plurality of sand boxes 11 at intervals. A chain extending along its length direction is installed on the side walls of the pair of conveying tracks 2. A sprocket engaged with the chain is fixedly installed on the axle of the roller 3. The chain synchronously drives a plurality of sprockets to rotate, and further drives a plurality of rollers 3 to rotate synchronously, realizing the intermittent and stable cyclic conveying process of two sets of sand boxes 11.

[0026] Furthermore, flanges are fixedly installed on the front and rear sides of the sand box 11. The flanges are placed on the corresponding plurality of rollers 3, enabling stable conveying without affecting the rising of the sand box 11.

[0027] A pair of operating platforms 5 are fixedly installed at the bottom of the mounting frame 1. A longitudinally movable sliding plate 8 is installed on the operating platform 5. A pair of lower dies 12 are horizontally placed on the sliding plate 8. The lower dies 12 are moved to the position corresponding to the sand box 11 through the sliding plate 8. A pair of slide rails 7 are longitudinally and fixedly installed on the operating platform 5. The sliding plate 8 is slidably installed on the pair of slide rails 7. A pair of first cylinders 6 are fixedly installed at the front end of the operating platform 5. The first cylinders 6 are longitudinally arranged, and the telescopic ends are fixedly connected to the front end of the sliding plate 8. Starting the first cylinders 6 drives the sliding plate 8 to longitudinally move along the slide rails 7, longitudinally moving another pair of lower dies 12 to the casting position, and synchronously conveying another set of sand boxes 11 to the casting station, realizing the free switching of the casting of two sets of products.

[0028] A pair of sand shooting plates 10 that can move longitudinally are installed on the inner top of the mounting frame 1. A pair of upper sand hoppers 4 are fixedly installed on the top at the rear side of the mounting frame 1. The pair of sand shooting plates 10 move longitudinally to the position below the corresponding upper sand hoppers 4 to complete the sand loading process. A pair of docking pipes 22 are fixedly installed on the top of the sand shooting plates 10. A pair of hopper openings are provided at the bottom of the upper sand hoppers 4, and an upper sand cover 17 is also fixedly installed. A pair of telescopic pipes 18 that are docked with the corresponding hopper openings are installed in the upper sand cover 17. Valves are installed in the telescopic pipes 18. The two pairs of telescopic pipes 18 are telescopic (pneumatically or electrically telescopic) to be docked with the two pairs of docking pipes 22 to fill the sand shooting plates 10 with sand.

[0029] Furthermore, two pairs of longitudinally arranged guide rails 19 are fixedly installed on the inner top of the mounting frame 1. Each pair of guide rails 19 corresponds to one sand shooting plate 10. A plurality of pulleys 20 are rotatably connected to both the left and right sides of the sand shooting plates 10. The two sides of the pulleys 20 are placed on the corresponding side of the guide rails 19. A second cylinder 9 arranged longitudinally is fixedly installed on the front side of the top of the mounting frame 1. The telescopic end of the second cylinder 9 is movably connected to the front side of the sand shooting plate 10 through a rubber connecting piece. A plurality of abutting columns 13 that cooperate with the sand shooting plates 10 are fixedly installed on the inner top of the mounting frame 1. Start a pair of second cylinders 9 to drive a pair of sand shooting plates 10 to move longitudinally. Through the cooperation and guidance of the pulleys 20 and the guide rails 19, they move to the position below a pair of upper sand hoppers 4. Since the telescopic end of the second cylinder 9 and the sand shooting plate 10 are movably connected through a rubber part, the soft connection form enables the sand shooting plate 10 to continue to rise a small distance.

[0030] A jacking assembly that can jack up the corresponding lower mold 12 is installed at the bottom of the operating table 5. The jacking assembly is used to jack up the lower mold 12 to be combined with the corresponding sand box 11, and then make the sand box 11 dock with the corresponding sand shooting plate 10. The jacking assembly includes a hydraulic cylinder 25 fixedly installed at the bottom of the operating table 5. The hydraulic cylinder 25 is arranged vertically. Jacking holes are provided at the bottom of the slide plate 8 corresponding to the positions of a pair of lower molds 12. The telescopic end of the hydraulic cylinder 25 passes through the corresponding jacking holes to jack up the lower mold 12. Vertical guide columns 15 are fixedly installed at the four corners of the lower mold 12 on the slide plate 8. Guide plates 14 that cooperate with the corresponding guide columns 15 are fixedly installed at the four corners of the lower mold 12. The guide plates 14 move up and down along the guide columns 15. A limit nut 16 is threadedly connected to the top of the guide column 15. Starting the hydraulic cylinder 25 can jack up a pair of lower molds 12. After being combined with the sand box 11, continue to jack up to make the sand box 11 dock with the sand shooting plate 10. At this time, the flanges on both sides of the sand box 11 are separated from a plurality of rollers 3, and a plurality of sand shooting pipes 23 are inserted into the docking holes 21 at the top of the sand box 11. The sand shooting plate 10, the sand box 11, and the lower mold 12 are in top contact. The lower mold 12 is hoisted and placed on the slide plate 8. The guide column 15 passes through the corresponding guide plate 14, and the limit nut 16 is used for the upward limit.

[0031] A plurality of sand blasting tubes 23 are evenly distributed on the bottom of the sand blasting plate 10, a plurality of docking holes 21 corresponding to the sand blasting tubes 23 are evenly distributed on the top of the sand box 11, a high temperature resistant sealing ring 24 is installed on the bottom side wall of the sand blasting tube 23, a gas tank is installed on the top of the mounting frame 1, and an air pump connected to the gas tank is also installed, two pairs of air pipes are fixed on the inner top of the mounting frame 1, each pair of air pipes cooperates with a corresponding pair of docking tubes 22, the air outlet end of the air pump is connected to the air pipe, the docking tube 22 rises and docks with the corresponding air pipe, the docking tube 22 docks with the air pipe, and the air pump is started to pump high-pressure gas into the sand blasting plate 10, so that sand is evenly injected into the mold cavity through the plurality of sand blasting tubes 23.

[0032] Two sets of sand boxes 11 are transported to the casting station through a pair of conveying tracks 2 in an interval manner. At this time, a pair of second cylinders 9 are started to drive a pair of sand shooting plates 10 to move longitudinally, and are guided by the pulley 20 and the guide rail 19 to move to the bottom of a pair of upper sand hoppers 4. Two pairs of telescopic tubes 18 are telescopic (pneumatically or electrically telescopic) and docked with two pairs of docking tubes 22, and the sand shooting plates 10 are filled with sand. Subsequently, a pair of lower molds 12 are jacked up through the jacking assembly at the bottom. The pair of lower molds 12 are adapted to a set of sand boxes 11. The pair of lower molds 12 can be jacked up by starting the hydraulic cylinder 25, and the pair of lower molds 12 can be jacked up after being molded with the sand box 11, and the jacking up continues to be carried out to dock the sand box 11 with the sand shooting plate 10. At this time, the overlapping edges on both sides of the sand box 11 are separated from the multiple rollers 3, and multiple sand shooting tubes 23 are inserted into the docking holes 21 on the top of the sand box 11. The sand shooting plate 10, the sand box 11, and the lower mold 12 are connected and continue to rise by 2-4cm. Since the telescopic end of the second cylinder 9 is movably connected to the sand shooting plate 10 through a rubber piece, the soft connection allows the sand shooting plate 10 to continue to rise. At this time, the pulley 20 is separated from the guide rail 19, so that the docking tube 22 is docked with the air pipe, and the air pump is started to pump high-pressure gas into the sand shooting plate 10, and the sand is evenly shot into the mold cavity through the multiple sand shooting tubes 23. The heating component in the lower mold 12 is used to melt the sand to form a sand core and a sand shell.

[0033] After molding, the jacking assembly descends, and after the sand box 11 and the lower mold 12 descend and separate, the first cylinder 6 is started to drive the slide plate 8 to move longitudinally along the slide rail 7, and the other pair of lower molds 12 are moved longitudinally to the casting position. The other set of sand boxes 11 is synchronously transported to the casting station to realize free switching of the two sets of product castings.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic mold changing device for casting a bridge housing, comprising a mounting frame (1), characterized in that: A pair of parallel conveying tracks (2) are fixedly installed transversely on the mounting frame (1), and a plurality of rollers (3) are installed at intervals on the opposite side walls of the pair of conveying tracks (2). The plurality of rollers (3) are used to convey a plurality of sand boxes (11) at intervals. A pair of operating tables (5) are fixedly installed at the bottom of the mounting frame (1), and a slide plate (8) that can be moved longitudinally is installed on the operating table (5). A pair of lower molds (12) are placed transversely on the slide plate (8), and the lower molds (12) are moved to the corresponding sand box (11) position through the slide plate (8). A pair of sand blasting plates (10) that can be moved longitudinally are installed on the inner top of the mounting frame (1). The mounting frame (1) A pair of sand loading hoppers (4) are fixedly installed on the top of the rear side, and a pair of sand shooting plates (10) are longitudinally moved to the bottom of the corresponding sand loading hoppers (4) to complete the sand loading process. A lifting component capable of lifting the corresponding lower mold (12) is installed at the bottom of the operating table (5). The lifting component is used to lift the lower mold (12) to close the mold with the corresponding sand box (11), and then dock the sand box (11) with the corresponding sand shooting plate (10). A plurality of sand shooting tubes (23) are evenly distributed on the bottom of the sand shooting plate (10), and a plurality of docking holes (21) corresponding to the sand shooting tubes (23) are evenly distributed on the top of the sand box (11). A high-temperature resistant sealing ring (24) is installed on the bottom side wall of the sand shooting tube (23).

2. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: A pair of side walls of the conveying tracks (2) are provided with chains extending along their length direction, and a sprocket engaged with the chain is fixedly provided on the axle of the roller (3), and the chain synchronously drives a plurality of sprockets to rotate.

3. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: A pair of slide rails (7) are longitudinally fixedly mounted on the operating table (5), and the slide plate (8) is slidably mounted on the pair of slide rails (7).

4. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: A pair of first cylinders (6) are fixedly mounted on the front end of the operating table (5); the first cylinders (6) are arranged longitudinally, and the telescopic ends are fixedly connected to the front end of the slide plate (8).

5. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: The front and rear sides of the sand box (11) are both fixedly mounted with overlapping edges, and the overlapping edges are overlapped on a plurality of rollers (3) on the corresponding sides.

6. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: The lifting assembly comprises a hydraulic cylinder (25) fixedly mounted on the bottom of the operating table (5), the hydraulic cylinder (25) being arranged vertically, and lifting holes being arranged at the bottom of the slide plate (8) corresponding to a pair of lower moulds (12), and the telescopic end of the hydraulic cylinder (25) passing through the corresponding lifting holes to lift the lower mould (12), and vertical guide pillars (15) being fixedly mounted on the slide plate (8) at the four corners corresponding to the lower mould (12), and guide plates (14) cooperating with the corresponding guide pillars (15) being fixedly mounted at the four corners of the lower mould (12), and the top of the guide pillar (15) being threadedly connected to a limiting nut (16).

7. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: Two pairs of longitudinally arranged guide rails (19) are fixedly installed on the inner top of the mounting frame (1), each pair of guide rails (19) corresponds to a sandblasting plate (10), and the left and right sides of the sandblasting plate (10) are rotatably connected to a plurality of pulleys (20), and the pulleys (20) on both sides are mounted on the guide rails (19) on the corresponding sides. A longitudinally arranged second cylinder (9) is fixedly installed on the front side of the top of the mounting frame (1), and the telescopic end of the second cylinder (9) is movably connected to the front side of the sandblasting plate (10) through a rubber connector. A plurality of abutment columns (13) cooperating with the sandblasting plate (10) are fixedly installed on the inner top of the mounting frame (1).

8. The automatic mold changing device for casting axle housing according to claim 1, characterized in that: A pair of butt-jointed pipes (22) are fixedly mounted on the top of the sand shooting plate (10), a pair of hopper openings are arranged at the bottom of the upper sand hopper (4), and an upper sand cover (17) is also fixedly mounted thereon. A pair of telescopic pipes (18) butt-jointed with the corresponding hopper openings are mounted in the upper sand cover (17), and valves are mounted in the telescopic pipes (18).

9. The automatic mold changing device for casting axle housing according to claim 8, characterized in that: A gas tank is installed on the top of the mounting frame (1), and an air pump connected to the gas tank is also installed. Two pairs of air pipes are fixed to the inner top of the mounting frame (1), and each pair of air pipes cooperates with a corresponding pair of butt pipes (22). The air outlet of the air pump is connected to the air pipe, and the butt pipes (22) rise to butt with the corresponding air pipes.

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