Gearbox casting device and gearbox casting method

Abstract

The present invention relates to a gearbox casting device, comprising a sand box, a sand mold and a sand core located in the sand box, a core rod and a plurality of support rods located on the outer side of the core rod are arranged in the sand core, a positioning plate is arranged on the end surface of the core rod, and a positioning groove adapted to the positioning plate is arranged on the inner side surface of the sand box. In the gearbox casting device of the present invention, the sand core is not easy to rotate and float, the sand core is easy to clean after casting, and the finished product has high quality.

Description

Technical Field

[0001] The invention relates to a casting device, in particular to a gearbox casting device. In addition, the invention also relates to a casting method for the gearbox. Background Art

[0002] As a large box, the gearbox often needs to work in an environment with a temperature of -40℃ to 45℃. Therefore, it needs to have resistance to cold brittleness and high sealing performance at low temperatures. Moreover, at high temperatures, the box needs to have anti-leakage performance. However, when casting existing gearboxes, due to the casting device and casting method, the quality of the finished product is low, and there are often problems such as slag inclusion, sand inclusion, air holes, insufficient pouring in thin walls, and leakage. In addition, due to the buoyancy of the sand core of the existing gearbox casting device, it is easy to float and rotate during the casting process, thereby affecting the quality of the finished product. Moreover, after the casting is completed, the sand core is not easy to clean.

[0003] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a gearbox casting device with a new structure to make it more valuable for industrial use. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a gearbox casting device in which the sand core is not easy to rotate and float, the sand core is easy to clean after casting, and the finished product quality is high.

[0005] The gearbox casting device of the present invention comprises a sand box, a sand mold and a sand core located in the sand box, a core rod and a plurality of support rods located on the outer surface of the core rod are arranged in the sand core, a positioning plate is arranged on the end surface of the core rod, and a positioning groove adapted to the positioning plate is arranged on the inner side surface of the sand box.

[0006] Furthermore, in the gearbox casting device of the present invention, an end cover is threadedly connected to the end surface of the core rod, and the positioning plate is fixed to the surface of the end cover.

[0007] Furthermore, in the gearbox casting device of the present invention, a transmission cavity is provided inside the core rod, and an output channel communicating with the transmission cavity is provided on the end surface of the support rod.

[0008] Furthermore, in the gearbox casting device of the present invention, a water spray block is provided in the output channel, a slide plate slidably matched with the support rod is provided at the end of the water spray block, a spray hole extending from the end face of the slide plate to the end face of the water spray block is provided on the slide plate, and a limiting ring for limiting the slide plate is provided on the inner side face of the support rod.

[0009] Furthermore, in the gearbox casting device of the present invention, a cleaning brush is provided on the end surface of the water spray block.

[0010] Furthermore, in the gearbox casting device of the present invention, the support rod is connected to the core rod by threads.

[0011] By means of the above scheme, the gearbox casting device of the present invention has at least the following advantages: the gearbox casting device of the present invention, the arrangement of the positioning plate and the positioning groove, makes it difficult for the sand core to float or flip under the action of buoyancy during pouring, thereby improving the quality of the casting. Specifically, during pouring, the positioning plate on the end face of the core rod is inserted into the positioning groove, and the positioning plate will not rotate or move up and down under the action of the positioning groove, thereby realizing the positioning of the sand core and preventing it from floating or rotating. The arrangement of the support rod realizes the rapid cleaning of the sand core. Specifically, after the casting is taken out, the operator cleans the surface of the casting, fixes it through the bracket, and then connects the core rod to the motor on the bracket. The output shaft of the motor drives the core rod to rotate. As the core rod rotates, the support rod connected to the core rod also rotates, thereby quickly cleaning the sand core in the inner cavity of the casting.

[0012] In summary, the sand core of the gearbox casting device of the present invention is not easy to rotate and float, the sand core is easy to clean after casting, and the quality of the finished product is high.

[0013] A casting method for a gearbox comprises the following steps:

[0014] S1: 30% pig iron, 50% scrap steel and 20% recycled materials are placed in a furnace for smelting by weight, and the smelting temperature reaches 1500°C to 1530°C and then kept at the temperature for 10 minutes;

[0015] S2: The smelted material is taken out of the furnace, and after cooling to 1480°C, it is poured into a spheroidizing bag for spheroidization for 60 to 90 seconds;

[0016] S3: convert the spheroidized material into a furnace and add an inoculant for inoculation;

[0017] S4: After the temperature of the inoculated material drops to 1310-1340°C, the material is poured into the gearbox casting device for casting;

[0018] The gearbox casting device comprises a sand box, a sand mold and a sand core located in the sand box, a core rod and a plurality of support rods located on the outer surface of the core rod are provided in the sand core, a positioning plate is provided on the end surface of the core rod, a positioning groove adapted to the positioning plate is provided on the inner side surface of the sand box, an end cover is threadedly connected to the end surface of the core rod, the positioning plate is fixedly arranged on the surface of the end cover, a transmission cavity is provided inside the core rod, an output channel connected to the transmission cavity is provided on the end surface of the support rod, a water spray block is provided in the output channel, a slide plate slidably matched with the support rod is provided at the end of the water spray block, a spray hole extending from the end surface of the slide plate to the end surface of the water spray block is provided on the slide plate, a limiting ring for limiting the slide plate is provided on the inner side surface of the support rod, a cleaning brush is provided on the end surface of the water spray block, the support rod is threadedly connected to the core rod, and a gate is provided at the top of the sand box.

[0019] The casting method of the gearbox of the present invention has a low pouring temperature, so that the operator can realize pouring by fast pouring and fast filling of the mold through a large pouring cup, thereby preventing slag and sand inclusion caused by baking of the mold wall due to long-term pouring.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the gearbox casting device of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the sand core;

[0023] Figure 3 yes Figure 2 A partial enlarged view of the middle A part;

[0024] Figure 4 is a side view of the gearbox;

[0025] Figure 5 It is a top view of the gearbox.

[0026] In the figure, 1: sand box; 2: sand mold; 3: sand core; 4: core rod; 5: support rod; 6: positioning plate; 7: transmission chamber; 8: output channel; 9: water spray block; 10: slide plate; 11: spray hole; 12: limit ring; 13: cleaning brush; 14: casting. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] See also Figures 1 to 5 A gearbox casting device according to a preferred embodiment of the present invention comprises a sand box 1, a sand mold 2 and a sand core 3 located in the sand box, a core rod 4 and a plurality of support rods 5 located on the outer surface of the core rod are provided in the sand core, a positioning plate 6 is provided on the end surface of the core rod, and a positioning groove adapted to the positioning plate is provided on the inner side surface of the sand box.

[0029] The setting of the positioning plate and the positioning groove makes it difficult for the sand core to float or flip over under the action of buoyancy during pouring, thereby improving the quality of the casting 14. Specifically, during pouring, the positioning plate on the end face of the core rod is inserted into the positioning groove, and the positioning plate will not rotate or move up and down under the action of the positioning groove, thereby realizing the positioning of the sand core and preventing it from floating or rotating. The setting of the support rod realizes the rapid cleaning of the sand core. Specifically, after the casting is taken out, the operator cleans the surface of the casting, fixes it with the bracket, and then connects the core rod to the motor on the bracket. The output shaft of the motor drives the core rod to rotate. As the core rod rotates, the support rod connected to the core rod also rotates, thereby quickly cleaning the sand core in the inner cavity of the casting.

[0030] Preferably, in the gearbox casting device of the present invention, an end cover is threadedly connected to the end surface of the core rod, and the positioning plate is fixedly arranged on the surface of the end cover.

[0031] The provision of the end cover facilitates the installation of the positioning plate.

[0032] Preferably, in the gearbox casting device of the present invention, a transmission cavity 7 is provided inside the core rod, and an output channel 8 communicating with the transmission cavity is provided on the end surface of the support rod.

[0033] The setting of the transmission cavity and the output channel realizes the cleaning of the sand core. Specifically, after the casting is completed, the operator connects the end of the core rod to the external water source through a pipeline, and the clean water is input into the support rod through the transmission cavity and output from the output channel. The output clean water cleans the inner surface of the casting.

[0034] Preferably, the gearbox casting device of the present invention is provided with a water spray block 9 in the output channel, the end of the water spray block is provided with a slide plate 10 slidably matched with the support rod, the slide plate is provided with a spray hole 11 extending from the end surface of the slide plate to the end surface of the water spray block, and the inner side surface of the support rod is provided with a limiting ring 12 for limiting the slide plate.

[0035] Since there is a certain gap between the end of the support rod and the inner side of the casting, the water spray block is set to further clean the inner side. Specifically, during casting, the water spray block is located inside the support rod. After casting, the clean water input through the transmission cavity flushes the slide plate. As the inner hole diameter of the slide plate becomes smaller, the slide plate extends outward under the action of water pressure, thereby driving the water spray block to extend outward until the slide plate contacts the limit ring. The water sprayed from the water spray block flushes the inner side of the casting, thereby cleaning the casting.

[0036] Preferably, in the gearbox casting device of the present invention, a cleaning brush 13 is provided on the end surface of the water spray block.

[0037] The cleaning brush is arranged so that when the core rod rotates, the cleaning brush can brush the inner side surface of the casting.

[0038] Preferably, in the gearbox casting device of the present invention, the support rod is connected to the core rod by threads.

[0039] A casting method for a gearbox comprises the following steps:

[0040] S1: 30% pig iron, 50% scrap steel and 20% recycled materials are placed in a furnace for smelting by weight, and the smelting temperature reaches 1500°C to 1530°C and then kept at the temperature for 10 minutes;

[0041] S2: The smelted material is taken out of the furnace, and after cooling to 1480°C, it is poured into a spheroidizing bag for spheroidization for 60 to 90 seconds;

[0042] S3: convert the spheroidized material into a furnace and add an inoculant for inoculation;

[0043] S4: After the temperature of the inoculated material drops to 1310-1340°C, the material is poured into the gearbox casting device for casting;

[0044] Among them, the gearbox casting device includes a sand box, a sand mold and a sand core located in the sand box, a core rod and a plurality of support rods located on the outer side of the core rod are arranged in the sand core, a positioning plate is arranged on the end face of the core rod, a positioning groove adapted to the positioning plate is arranged on the inner side face of the sand box, an end cover is threadedly connected to the end face of the core rod, the positioning plate is fixed to the surface of the end cover, a transmission cavity is arranged inside the core rod, an output channel connected to the transmission cavity is arranged on the end face of the support rod, a water spray block is arranged in the output channel, a slide plate slidably matched with the support rod is arranged at the end of the water spray block, a spray hole extending from the end face of the slide plate to the end face of the water spray block is arranged on the slide plate, a limiting ring for limiting the slide plate is arranged on the inner side face of the support rod, a cleaning brush is arranged on the end face of the water spray block, the support rod is threadedly connected to the core rod, and a gate is arranged at the top of the sand box.

[0045] The casting method of the gearbox of the present invention has a low pouring temperature, so that the operator can realize pouring by fast pouring and fast filling of the mold through a large pouring cup, thereby preventing slag and sand inclusion caused by baking of the mold wall due to long-term pouring.

[0046] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that those skilled in the art can implement the present invention in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive in all respects, and the scope of protection of the present invention is limited by the appended claims rather than the above description.

[0047] In addition, the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. At the same time, it should be understood that although this specification is described in accordance with the implementation mode, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gearbox casting device, comprising a sand box, a sand mold and a sand core located in the sand box, characterized in that: The sand core is provided with a core rod and a plurality of supporting rods located on the outer side of the core rod, a positioning plate is provided on the end surface of the core rod, and a positioning groove adapted to the positioning plate is provided on the inner side surface of the sand box; A transmission cavity is provided inside the core rod, and an output channel communicating with the transmission cavity is provided on the end surface of the support rod; A water spray block is provided in the output channel, a slide plate slidably matched with the support rod is provided at the end of the water spray block, a spray hole extending from the end surface of the slide plate to the end surface of the water spray block is provided on the slide plate, and a limiting ring for limiting the slide plate is provided on the inner side surface of the support rod; A cleaning brush is provided on the end surface of the water spray block.

2. The gearbox casting device according to claim 1, characterized in that: An end cover is threadedly connected to the end surface of the core rod, and the positioning plate is fixed to the surface of the end cover.

3. The gearbox casting device according to claim 1, characterized in that: The support rod is connected to the core rod through threads.

4. A casting method for a gearbox, characterized in that: The following steps are involved: S1: 30% of pig iron, 50% of scrap steel and 20% of recycled materials are placed in a furnace for smelting, and the smelting temperature reaches 1500° C. to 1530° C. and then kept at this temperature for 10 minutes; S2: The smelted material is taken out of the furnace, and after cooling to 1480°C, it is poured into a spheroidizing bag for spheroidization for 60 to 90 seconds; S3: convert the spheroidized material into a furnace and add an inoculant for inoculation; S4: After the temperature of the inoculated material drops to 1310-1340°C, the material is poured into the gearbox casting device for casting; The gearbox casting device comprises a sand box, a sand mold and a sand core located in the sand box, a core rod and a plurality of support rods located on the outer surface of the core rod are provided in the sand core, a positioning plate is provided on the end surface of the core rod, a positioning groove adapted to the positioning plate is provided on the inner side surface of the sand box, an end cover is threadedly connected to the end surface of the core rod, the positioning plate is fixedly arranged on the surface of the end cover, a transmission cavity is provided inside the core rod, an output channel connected to the transmission cavity is provided on the end surface of the support rod, a water spray block is provided in the output channel, a slide plate slidably matched with the support rod is provided at the end of the water spray block, a spray hole extending from the end surface of the slide plate to the end surface of the water spray block is provided on the slide plate, a limiting ring for limiting the slide plate is provided on the inner side surface of the support rod, a cleaning brush is provided on the end surface of the water spray block, the support rod is threadedly connected to the core rod, and a gate is provided at the top of the sand box.

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