Casting mold for planetary carrier processing

Abstract

The present application relates to a casting mold for processing a planetary carrier, which belongs to the technical field of casting, and includes an upper die, a lower die and a core assembly, wherein the core assembly includes a core, a casting channel and a riser, wherein the casting channel includes a straight runner, a horizontal runner and an ingrown runner, wherein the straight runner is vertically connected to the middle position of the horizontal runner, wherein the number of the ingrowns is four, and the four ingrowns are symmetrically connected to the horizontal runner (34), and the riser is fixed to the core. The present application provides a cylindrical trough and a positioning hole in the lower die, wherein an outer chiller is placed in the cylindrical trough, and an inner chiller of the center hole is placed in the positioning hole, wherein the outer chiller and the inner chiller of the center hole are wrapped in the first pouring position of the cylinder head frame, so as to make the molten metal in the molding cavity solidify sequentially toward the riser direction, and prevent the generation of defects such as shrinkage cavities and shrinkage, thereby greatly improving the molding quality of the product.

Description

Technical Field

[0001] The present application relates to the technical field of casting, and in particular to a casting mold for processing a planetary carrier. Background Art

[0002] Currently, for Figure 1 The planetary carrier 7 for the excavator shown is cast by a casting process during production.

[0003] The existing casting mold has an unreasonable structural layout, and the molded product surface will have large cracks and pores. Therefore, it is urgent to redesign the existing mold reasonably in order to improve the molding quality of the product. Utility Model Content

[0004] The purpose of the present application is to provide a casting mold for planetary carrier processing to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the present application provides a casting mold for planetary carrier processing using the following technical solution:

[0006] A casting mold for processing a planetary carrier, comprising an upper die, a lower die and a core assembly, wherein the core assembly comprises a core, a casting channel and a riser, wherein the casting channel comprises a sprue, a runner and an ingate, wherein the sprue is vertically connected to the middle of the runner, wherein four ingates are arranged, wherein the four ingates are symmetrically connected to the runner, and the riser is fixed to the core;

[0007] The upper surface of the lower die is provided with a lower cavity used in conjunction with the core, and the lower cavity includes a positioning placement groove, a lower annular groove and a cylindrical stuffy groove in sequence from top to bottom, a positioning hole is provided in the middle of the cylindrical stuffy groove, a center hole inner cold iron is placed in the positioning hole, and two arc-shaped outer cold irons are matched on the inner side wall of the cylindrical stuffy groove, and a placement groove for placing the inner runner is also provided on the surface of the lower die, and the placement groove is connected to the lower annular groove, and a lower yielding groove for placing the horizontal runner is provided on the surface of the lower die;

[0008] The lower surface of the upper die is provided with an upper cavity used in conjunction with the core, the upper cavity includes an upper annular groove and a riser groove for placing a riser, and the upper die is also provided with an upper clearance groove for placing a cross runner and a through hole adapted to the straight runner.

[0009] The core surface is provided with three T-shaped through grooves evenly distributed in an annular shape, three cylindrical protrusions evenly distributed in an annular shape are symmetrically arranged on both sides of the core, and an annular groove is provided on the core surface near the cylindrical protrusions.

[0010] The lower annular groove surface and the upper annular groove surface are both provided with holes at positions corresponding to the columnar protrusions.

[0011] Preferably, an exhaust pipe is fixed on the columnar protrusion on the side of the core close to the riser, and a plug hole is opened in the upper die at a position corresponding to the exhaust pipe.

[0012] By adopting the above technical solution, the exhaust pipe can discharge the gas in the core to improve the quality of the casting.

[0013] Preferably, in order to facilitate filtering of the metal casting liquid, a square filter sheet is placed between the sprue and the runner.

[0014] To sum up, the present application includes at least one of the following beneficial technical effects: the overall internal structure layout of the casting mold for planetary frame processing is reasonable. By opening a cylindrical groove and a positioning hole in the lower die, an external chiller is placed in the cylindrical groove, and an inner chiller of the center hole is placed in the positioning hole. The external chiller and the inner chiller of the center hole are wrapped in the position where the cylinder head frame is poured first, which can make the molten metal in the molding cavity solidify sequentially toward the riser direction, prevent the formation of shrinkage holes, shrinkage defects, etc., and greatly improve the molding quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram used to reflect the cylinder head frame of an excavator in the prior art.

[0016] Figure 2 It is a schematic diagram of the exploded structure of the upper die, the core assembly and the lower die in the embodiment of the present application.

[0017] Figure 3 It is a schematic diagram of the structure of the lower die in the embodiment of the present application.

[0018] Figure 4 It is a schematic diagram of the structure of the upper die in the embodiment of the present application.

[0019] Figure 5 It is a schematic diagram of the structure in the embodiment of the present application used to reflect the upper die in the open state after casting.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. upper die; 11. upper annular groove; 12. riser groove; 13. upper clearance groove; 14. through hole; 2. lower die; 21. positioning and placing groove; 22. lower annular groove; 23. cylindrical stuffy groove; 231. positioning hole; 24. placing groove; 25. lower clearance groove; 31. core; 311. through groove; 312. columnar protrusion; 313. annular groove; 32. riser; 33. sprue; 34. runner; 35. endogate; 4. inner chiller of the center hole; 5. outer chiller; 6. exhaust pipe. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-5 This application is described in further detail.

[0022] The present application embodiment discloses a casting mold for processing a planetary carrier, referring to Figure 1-5 , including an upper die 1, a lower die 2 and a core assembly, the core assembly including a core 31, a pouring channel and a riser 32, the pouring channel including a sprue 33, a runner 34 and an entgate 35, the sprue 33 is vertically connected to the middle position of the runner 34, the number of entgates 35 is four, the four entgates 35 are symmetrically connected to the runner 34, the riser 32 is fixed to the core 31, three T-shaped through grooves 311 uniformly distributed in an annular shape are opened on the surface of the core 31, three cylindrical protrusions 312 uniformly distributed in an annular shape are symmetrically arranged on both sides of the core 31, and an annular groove 313 is opened on the surface of the core 31 near the cylindrical protrusion 312;

[0023] Reference Figure 3 The upper surface of the lower die 2 is provided with a lower cavity used in conjunction with the core 31, and the lower cavity includes a positioning placement groove 21, a lower annular groove 22 and a cylindrical stuffy groove 23 from top to bottom. A positioning hole 231 is provided in the middle of the cylindrical stuffy groove 23, and a center hole inner cold iron 4 is placed in the positioning hole 231. Two arc-shaped outer cold irons 5 are matched on the inner side wall of the cylindrical stuffy groove 23. A placement groove 24 for placing the inner runner 35 is also provided on the surface of the lower die 2. The placement groove 24 is connected to the lower annular groove 22, and a lower yielding groove 25 for placing the horizontal runner 34 is provided on the surface of the lower die 2;

[0024] Reference Figure 4 The lower surface of the upper die 1 is provided with an upper cavity used in conjunction with the core 31, the upper cavity includes an upper annular groove 11 and a riser 32 groove 12 for placing the riser 32, and the upper die 1 is also provided with an upper clearance groove 13 for placing the horizontal runner 34 and a through hole 14 adapted to the straight runner 33;

[0025] The surfaces of the lower annular groove 22 and the upper annular groove 11 are both provided with holes at positions corresponding to the columnar protrusions 312 .

[0026] Reference Figure 2 In order to improve the casting quality, an exhaust pipe 6 is fixed to the columnar protrusion 312 on the side of the core 31 close to the riser 32, and a plug hole is opened in the upper die 1 at the position corresponding to the exhaust pipe 6;

[0027] A square filter sheet (not shown in the figure) is placed between the sprue 33 and the runner 34. The square filter sheet can filter large particles of impurities in the casting liquid to improve the quality of the casting.

[0028] The implementation principle of a casting mold for planetary carrier processing in the embodiment of the present application is as follows:

[0029] The staff sequentially puts the inner cold iron 4 of the center hole into the positioning hole 231, and the two outer cold irons 5 into the cylindrical groove 23, and then sequentially puts the pouring channel into the corresponding placement groove 24 and the lower clearance groove 25 of the lower die 2, and then puts the core 31 along the positioning placement groove 21, and finally, the upper die 1 and the lower die 2 are molded together, and a molding cavity is formed between the upper die 1, the lower die 2 and the core 31;

[0030] After the mold is closed, the molten metal enters the ingrowth 35 from the sprue 33 and the runner 34, and enters the molding cavity through the ingrowth 35, and overflows the entire molding cavity through the T-shaped through groove 311 on the surface of the core 31. In this process, the inner chiller 4 and the outer chiller 5 of the center hole make the molten metal in the molding cavity solidify sequentially toward the riser 32 to prevent the occurrence of shrinkage cavities, shrinkage and other defects. At the same time, the riser 32 can transfer the shrinkage cavities generated when the casting shrinks to the riser 32, ensuring the quality of the casting, and there will be no large cracks and pores on the surface of the casting.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A casting mold for planetary carrier processing, characterized in that: The invention comprises an upper die (1), a lower die (2) and a core assembly, wherein the core assembly comprises a core (31), a pouring channel and a riser (32), wherein the pouring channel comprises a sprue (33), a runner (34) and an entgate (35), wherein the sprue (33) is vertically connected to the middle of the runner (34), wherein the number of the entgates (35) is four, wherein the four entgates (35) are symmetrically connected to the runner (34), and the riser (32) is fixed to the core (31). The upper surface of the lower die (2) is provided with a lower cavity for use with the core (31), and the lower cavity comprises, from top to bottom, a positioning placement groove (21), a lower annular groove (22) and a columnar muffle groove (23). A positioning hole (231) is provided in the middle of the columnar muffle groove (23), and a center hole inner cold iron (4) is placed in the positioning hole (231). Two arc-shaped outer cold irons (5) are matched and arranged on the inner side wall of the columnar muffle groove (23). The surface of the lower die (2) is also provided with a placement groove (24) for placing an inner runner (35), and the placement groove (24) is connected to the lower annular groove (22). The surface of the lower die (2) is provided with a lower clearance groove (25) for placing a horizontal runner (34). The lower surface of the upper die (1) is provided with an upper cavity for use with the core (31), the upper cavity comprising an upper annular groove (11) and a riser groove (12) for arranging a riser (32), and the upper die (1) is also provided with an upper clearance groove (13) for arranging a horizontal runner (34) and a through hole (14) adapted to the straight runner (33).

2. The casting mold for planetary carrier processing according to claim 1, characterized in that: The surface of the core (31) is provided with three T-shaped through grooves (311) evenly distributed in an annular shape, three cylindrical protrusions (312) evenly distributed in an annular shape are symmetrically arranged on both sides of the core (31), and an annular groove (313) is provided on the surface of the core (31) near the cylindrical protrusions (312).

3. The casting mold for planetary carrier processing according to claim 2, characterized in that: The surface of the lower annular groove (22) and the surface of the upper annular groove (11) are both provided with holes at positions corresponding to the columnar protrusions (312).

4. The casting mold for planetary carrier processing according to claim 2, characterized in that: An exhaust pipe (6) is fixed on the columnar protrusion (312) on the side of the core (31) close to the riser (32), and a plug hole is provided in the upper die (1) at a position corresponding to the exhaust pipe (6).

5. The casting mold for planetary carrier processing according to claim 1, characterized in that: A square filter sheet is placed between the sprue (33) and the cross runner (34).

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