CN216780244U

CN216780244U - Excavator gyration bracket casting mould

Info

Publication number: CN216780244U
Application number: CN202220313753.8U
Authority: CN
Inventors: 吴明明; 王李虎; 张国防; 赵健
Original assignee: Shanxi Kangtengwei Machinery Manufacturing Co ltd
Current assignee: Shanxi Kangtengwei Machinery Manufacturing Co ltd
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-06-21
Anticipated expiration: 2032-02-16

Abstract

The utility model relates to an excavator rotating bracket casting mold which comprises an upper casting mold for forming an upper casting cavity and a lower casting mold for forming a lower casting cavity, wherein the upper casting mold comprises an upper bracket mold, a pouring system mold and an upper riser mold, the pouring system mold comprises a direct-flow passage mold, a main flow passage mold and a secondary flow passage mold, the main flow passage mold is C-shaped and is arranged on the outer side of the upper bracket mold in an equal height mode, the direct-flow passage mold is connected with the main flow passage mold, the secondary flow passage mold is arranged between the upper riser mold and the main flow passage mold, and the lower casting mold comprises a lower bracket mold which is matched with the upper bracket mold to form a bracket cavity together. The mould adopts a vertical parting arrangement structure, so that risers can be conveniently and respectively arranged, the risers can fully feed hot spot positions, and the problem of internal defects of castings is solved.

Description

Excavator gyration bracket casting mould

Technical Field

The utility model relates to the technical field of sand casting, in particular to a rotary offline casting mold of an excavator.

Background

The excavator is widely applied to the engineering fields of buildings, roads, mines, riverways and the like, the working environment is severe and complex, and the requirement on the stability of structural components is very high; the bracket connecting the large arm and the rotary platform is a key main stress part; at present, part of brackets in China adopt a welding structure, so that the impact resistance is poor, the fatigue life is short, the production cost is high, and the cracking and failure rate is high in the later use process due to large stress. At present, the bracket gradually by holistic welded structure type to foundry goods change, but current casting mould structure is unreasonable, and the molding process is complicated, and it is big to polish the clearance work load, and the bracket hot spot position can't obtain fully feeding in casting process moreover, and there is the internal defect of great probability at bracket hot spot position, and this makes the bracket of long-term work under complicated operating mode, the probability that produces the crackle can greatly increased, has very big potential safety hazard.

Accordingly, there is a need for improvements to existing carrier casting molds.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the excavator slewing bracket casting mould capable of reducing the internal defect trend and simplifying the molding process is provided.

In order to solve the technical problems, the utility model adopts the technical scheme that:

an excavator rotating bracket casting mold comprises an upper casting mold for forming an upper casting cavity and a lower casting mold for forming a lower casting cavity, wherein the upper casting mold comprises an upper bracket mold, a gating system mold and an upper riser mold, the gating system mold comprises a direct current channel mold, a main channel mold and a secondary channel mold, the main channel mold is C-shaped and is arranged on the outer side of the upper bracket mold in an equal height mode, the direct current channel mold is connected with the main channel mold, at least three upper riser molds are arranged, and the secondary channel mold is arranged between the upper riser mold and the main channel mold;

the lower casting mold comprises a lower bracket mold which is matched with the upper bracket mold to jointly form a bracket cavity, a lower riser mold matched with the upper riser mold is arranged on the lower casting mold, and a communicating mold connected with the upper bracket mold or the lower bracket mold is arranged on the upper riser mold or the lower riser mold.

In order to reduce the later machining workload, shaft hole positioning core heads are arranged in the upper bracket die and the lower bracket die.

In order to facilitate the mould assembling of the upper casting cavity and the lower casting cavity, the upper casting mould is provided with a concave positioning groove for forming a positioning block, and the lower casting mould is provided with a convex positioning block corresponding to the concave positioning groove.

Furthermore, a riser ring is arranged at the upper end of the upper riser die.

In order to improve the casting quality of the part with the excessively thin wall thickness of the bracket arm, the casting device further comprises a patch block which is connected with the upper bracket die and/or the lower bracket die.

For fixed casting mould, still include the die carrier, it sets up in the die carrier to go up the casting mould, the die carrier up end flushes with the up end of last casting mould, the both sides of die carrier are provided with the location platform, be provided with the locating pin on the location platform.

In order to form the sand mold, the sand mold further comprises a sand box, the lower end face of the sand box is matched with the upper end face of the mold frame, positioning holes matched with the positioning pins are formed in the two sides of the sand box, and a quick locking device is arranged between the sand box and the mold frame.

Compared with the prior art, the utility model has the following beneficial effects:

1. the mould adopts a vertical parting arrangement structure, so that risers can be conveniently and respectively arranged, the risers can fully feed hot spot positions, and the problem of internal defects of castings is solved.

2. According to the utility model, through the arrangement mode of the straight runner, the main runner, the secondary runner and the risers which are sequentially communicated, molten iron respectively enters from the 3 risers, so that the heat distribution of parts after casting relatively tends to be balanced, and the stress concentration phenomenon is reduced.

3. The utility model simplifies the molding process, improves the molding efficiency and reduces the production cost.

Drawings

The following will explain embodiments of the present invention in further detail through the accompanying drawings.

FIG. 1 is a schematic perspective view of an upper casting mold according to the present invention;

FIG. 2 is a schematic top view of the upper casting mold of the present invention;

FIG. 3 is a schematic view of the structure of the lower casting mold of the present invention;

FIG. 4 is a schematic view of the construction of a flask.

In the figure: 1-upper casting mold, 11-upper bracket mold, 12-gating system mold, 13-shaft hole positioning core print, 14-upper riser mold, 15-direct runner mold, 16-main runner mold, 17-secondary runner mold, 18-concave positioning groove, 19-riser ring, 2-lower casting mold, 21-lower bracket mold, 22-lower riser mold, 23-communicating mold, 24-convex positioning block, 3-patch block, 4-mold frame, 41 positioning table, 42 positioning pin, 5-flask, 51 positioning hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b):

as shown in fig. 1 to 4, the excavator slewing bracket casting mold comprises an upper casting mold 1 for forming an upper casting cavity and a lower casting mold 2 for forming a lower casting cavity, and the upper casting cavity and the lower casting cavity are matched to form a casting cavity of the excavator slewing bracket.

The upper casting mold 1 comprises an upper bracket mold 11, a gating system mold 12 and an upper riser mold 14, wherein the upper bracket mold 11 is used for forming the upper shape of a rotary bracket, the gating system mold 12 is used for forming a pouring runner, the gating system mold 12 comprises a straight runner mold 15, a main runner mold 16 and a secondary runner mold 17, the main runner mold 16 is C-shaped, the main runner mold 16 is arranged on the outer side of the upper bracket mold 11 in a height mode, the lower end of the straight runner mold 15 is connected with the main runner mold 16, the upper end of the straight runner mold exceeds the outside of a sand mold, the upper riser mold 14 is used for forming risers, at least three upper riser molds 14 are arranged, in the embodiment, the number of the upper riser molds is 3, and the secondary runner mold 17 is arranged between the upper riser mold 14 and the main runner mold 16 and used for communicating the risers with the main runner.

The lower casting mold 2 includes a lower bracket mold 21, the lower bracket mold 21 is used to form a lower shape of the pivoting bracket, and the lower bracket mold 21 and the upper bracket mold 11 cooperate to form a bracket cavity.

The lower casting mold 2 is further provided with a lower feeder mold 22 matched with the upper feeder mold 14, and the communication between the feeder and the bracket mold can be realized by arranging a communication mold 23 between the upper feeder mold 14 and the upper bracket mold 11, or arranging a communication mold 23 between the lower feeder mold 22 and the lower bracket mold 21.

All be provided with shaft hole location core 13 in upper bracket mould 11 and the lower bracket mould 21 for the shaft hole casting shaping reduces later stage machine tooling intensity. The upper casting mold 1 is provided with a concave positioning groove 18 for forming a positioning block, the lower casting mold 2 is provided with a convex positioning block 24 corresponding to the concave positioning groove, and the positioning groove matched with the positioning block is formed in the lower cavity through the convex positioning block 24.

The upper end of the upper riser die 14 is provided with a riser ring 19.

In order to improve the casting quality of the part with the excessively thin wall thickness of the bracket arm, the patch block 3 is arranged at the part with the smaller wall thickness of the upper bracket die 11 and/or the lower bracket die 21.

The upper casting mould 1 is arranged in the mould frame 4, the upper end face of the mould frame 4 is flush with the upper end face of the upper casting mould 1, the two sides of the mould frame 4 are provided with positioning tables 41, the positioning tables 41 are provided with positioning pins 42, the lower end face of the sand box 5 is matched with the upper end face of the mould frame 4, the two sides of the sand box 5 are provided with positioning holes 51 matched with the positioning pins 42, a quick locking device is arranged between the sand box 5 and the mould frame 4, and the quick locking device can adopt the existing locking device.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.

Claims

1. The utility model provides an excavator gyration bracket casting mould which characterized in that: the casting mold comprises an upper casting mold (1) for forming an upper casting cavity and a lower casting mold (2) for forming a lower casting cavity, wherein the upper casting mold (1) comprises an upper bracket mold (11), a gating system mold (12) and an upper riser mold (14), the gating system mold (12) comprises a direct-flow channel mold (15), a main flow channel mold (16) and a secondary flow channel mold (17), the main flow channel mold (16) is C-shaped and is arranged on the outer side of the upper bracket mold (11) in an equal height mode, the direct-flow channel mold (15) is connected with the main flow channel mold (16), the upper riser mold (14) is provided with at least three risers, and the secondary flow channel mold (17) is arranged between the upper riser mold (14) and the main flow channel mold (16);

the lower casting mold (2) comprises a lower bracket mold (21) which is matched with the upper bracket mold (11) to jointly form a bracket cavity, a lower riser mold (22) which is matched with the upper riser mold (14) is arranged on the lower casting mold (2), and a communicating mold (23) which is connected with the upper bracket mold (11) or the lower bracket mold (21) is arranged on the upper riser mold (14) or the lower riser mold (22).

2. The excavator slewing bracket casting mold of claim 1, wherein: and shaft hole positioning core heads (13) are arranged in the upper bracket die (11) and the lower bracket die (21).

3. The excavator slewing bracket casting mold of claim 1, wherein: the upper casting mold (1) is provided with a concave positioning groove (18) for forming a positioning block, and the lower casting mold (2) is provided with a convex positioning block (24) corresponding to the concave positioning groove.

4. The excavator slewing bracket casting mold of claim 1, wherein: and a riser ring (19) is arranged at the upper end of the upper riser mould (14).

5. The excavator slewing bracket casting mold of claim 1, wherein: the mould also comprises a patch block (3), wherein the patch block (3) is connected with the upper bracket mould (11) and/or the lower bracket mould (21).

6. The excavator slewing bracket casting mold of claim 1, wherein: still include die carrier (4), go up casting die (1) and set up in die carrier (4), die carrier (4) up end flushes with the up end of last casting die (1), the both sides of die carrier (4) are provided with location platform (41), be provided with locating pin (42) on location platform (41).

7. The excavator slewing bracket casting mold of claim 6, wherein: the sand box is characterized by further comprising a sand box (5), the lower end face of the sand box (5) is matched with the upper end face of the die carrier (4), positioning holes (51) matched with the positioning pins (42) are formed in the two sides of the sand box (5), and a quick locking device is arranged between the sand box (5) and the die carrier (4).