Improved shaft sleeve die-casting die

Abstract

The utility model relates to the technical field of die-casting dies, and discloses an improved shaft sleeve die-casting die which comprises a movable die and a fixed die, the movable die comprises a movable die block, and a plurality of mandrels are fixed on the movable die block; the fixed die comprises a main die block and a sub-die block which are arranged in a split manner; inserting holes corresponding to the mandrels are formed in the main module, and the mandrels are inserted into the corresponding inserting holes in a sleeved mode. The end part of the mandrel is inserted into the fixed die, so that an inner flange can be effectively prevented from appearing at the opening part of a through hole of a formed shaft sleeve blank, and the problems that a subsequent screw cannot penetrate through and is inconvenient to mount are effectively solved; and the sub-modules and the main module are separately arranged, so that the later maintenance cost of the mold can be reduced, and the mold cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting moulds, in particular to an improved bushing die-casting mould. Background Art

[0002] The original bushing die-casting mould is as shown in the attached instruction manual. Figure 6 As shown, bushing die-casting includes a moving die 10 and a fixed die 20. A core shaft 101 is arranged on the moving die. The core shaft protrudes above the surface of the moving die, and the end of the core shaft abuts against a plane of the cavity of the fixed die. The core shaft can form a through hole 904 on the bushing blank. The existing bushing die-casting mould has the following deficiencies. Since the end of the core shaft is prone to wear, an inner flanging 905 appears at the orifice of the through hole 904 of the bushing blank, as shown in the attached instruction manual. Figure 7 As shown; after milling the end face of the orifice of the through hole of the bushing blank, there will still be some residual inner flanging, which affects the subsequent passing of screws, etc. and affects the normal assembly work; secondly, the pin slot 906 formed by the existing bushing die-casting mould is in a "one" shape, and the subsequent installation of the pin shaft is relatively inconvenient. Content of the Utility Model

[0003] The purpose of the utility model is to provide an improved bushing die-casting mould. By inserting the end of the core shaft into the fixed die, it can effectively avoid the appearance of inner flanging at the orifice of the through hole of the formed bushing blank, and effectively solve the problems that the subsequent screws cannot pass through and the installation is inconvenient.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions:

[0005] An improved bushing die-casting mould, including a moving die and a fixed die. The moving die includes a moving die block, and a plurality of core shafts are fixed on the moving die block.

[0006] The fixed die includes a main module and a sub-module which are separately arranged; a jack corresponding to the core shaft is formed on the main module, and the core shaft is inserted into the corresponding jack.

[0007] The main module and the sub-module are separately arranged. The sub-module has a complex shape and can be processed separately. Moreover, the sub-module can be conveniently replaced when it is damaged, reducing the maintenance cost of the whole set of moulds; the core shaft is inserted into the jack to avoid the generation of inner flanging on the holes of the die-cast bushing.

[0008] The utility model is further arranged as follows: an installation counterbore is formed in the middle of the main module; the sub-module includes a formed part and a connecting part which are integrally formed. The connecting part is inserted and fixed in the installation counterbore; the bottom surface of the formed part is flush with the orifice end face of the installation counterbore;

[0009] The formed part includes a stepped core column and a rounded "V" - shaped protrusion formed on the outer wall of the stepped core column.

[0010] The strength of the bottom of the forming part can be increased through the connecting part, and a pin shaft limiting groove can be formed on the bushing blank through the forming part.

[0011] The present utility model is further arranged such that: a through hole is formed at the bottom of the mounting counterbore.

[0012] Through the through hole 1, it is convenient to install screws to tighten and lock the sub-module, and secondly, it is convenient to eject the bottom of the sub-module when the sub-module is disassembled.

[0013] The present utility model is further arranged such that: a guiding block is formed at the outer end of the rounded "V"-shaped protrusion. Through the guiding block, a guiding inclined surface can be formed on the bushing blank, which can further facilitate the later installation work of the pin shaft.

[0014] The present utility model is further arranged such that: a first rounded corner is formed at the mouth of the jack, and a second rounded corner is formed at the end of the mandrel. By providing the first rounded corner and the second rounded corner, it is convenient for the mandrel to be inserted into the jack; at the same time, a convex ring can be formed to protrude at the hole opening of the formed bushing blank, and this convex ring can be milled off during the later finishing process, thereby further avoiding the problem of internal flanging of the hole of the bushing blank.

[0015] The outstanding effect of the present utility model is:

[0016] Compared with the prior art, by inserting the end of the mandrel into the fixed mold, it can effectively avoid the internal flanging at the mouth of the through hole of the formed bushing blank, effectively solving the problem that the subsequent screw cannot pass through and the installation is inconvenient;

[0017] Through the sub-module, a limiting pin groove with a guiding function can be formed on the bushing blank at one time, which can facilitate the installation of the pin;

[0018] By setting the sub-module and the main module separately, it is convenient for the later maintenance cost of the mold and reduces the mold cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the present utility model;

[0020] Figure 2 is Figure 1 a partial enlarged view of A;

[0021] Figure 3 is Figure 1 a partial enlarged view of B;

[0022] Figure 4 is a structural schematic diagram of the sub-module of the present utility model;

[0023] Figure 5 is a structural schematic diagram of the bushing blank die-cast by the present utility model;

[0024] Figure 6 It is a schematic structural diagram of the original die-casting mold;

[0025] Figure 7 It is a schematic diagram of the bushing blank cast by the original die-casting mold.

[0026] Reference numerals in the drawings: 10, moving die; moving die block; 102, core shaft; 1021, second fillet;

[0027] 20, fixed die; 201, main die block; 202, sub-die block; 203, jack; 204, mounting counterbore; 205, through hole;

[0028] 2021, forming part; 2022, connecting part; 2023, stepped core column; 2024, fillet "V" - shaped protrusion; 2025, guiding block;

[0029] 2031, first fillet;

[0030] 90, bushing blank; 901, convex ring; 902, guiding inclined plane; 903, pin shaft limiting groove; 904, through hole; 905, inward flanging; 906, pin groove. Specific embodiments

[0031] [[ID=2S]]The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but not to limit the scope of the present invention.

[0032] The following reference is made to Figures 1 to 5 to illustrate the present invention:

[0033] An improved bushing die-casting mold includes a moving die 10 and a fixed die 20. The moving die 10 includes a moving die block 101, and a plurality of core shafts 102 are fixed on the moving die block 101;

[0034] The fixed die 20 includes a main die block 201 and a sub-die block 202 which are separately arranged; a jack 203 corresponding to the core shaft 102 is formed on the main die block 201, and the core shaft 102 is inserted into the corresponding jack 203.

[0035] The main die block and the sub-die block are separately arranged. The sub-die block has a complex shape and can be processed separately, and the worn sub-die block can also be conveniently replaced, reducing the maintenance cost of the whole set of molds; the core shaft is inserted into the jack to prevent the formation of inward flanging on the holes of the cast bushing.

[0036] A mounting counterbore 204 is formed in the middle of the main die block 201; the sub-die block 202 includes an integrally formed forming part 2021 and a connecting part 2022. The connecting part 2022 is inserted and fixed in the mounting counterbore 204; the bottom surface of the forming part is flush with the orifice end face of the mounting counterbore;

[0037] The forming part 2021 includes a stepped core column 2023 and a rounded "V"-shaped protrusion 2024 formed on the outer wall of the stepped core column 2023.

[0038] The strength of the bottom of the forming part can be increased through the connecting part, and a pin shaft limiting groove 903 can be formed on the bushing blank through the forming part.

[0039] A through hole 205 is formed at the bottom of the mounting counterbore 204.

[0040] Through the through hole 1, it is convenient to install screws to tighten and lock the sub-module, and secondly, it is convenient to eject the bottom of the sub-module when the sub-module is disassembled.

[0041] A guiding block 2025 is formed at the outer end of the rounded "V"-shaped protrusion 2024. Through the guiding block, a guiding inclined surface 902 can be formed on the bushing blank 90, which can further facilitate the later installation work of the pin shaft.

[0042] A first rounded corner 2031 is formed at the mouth of the jack 203, and a second rounded corner 1021 is formed at the end of the core shaft 102. By setting the first rounded corner and the second rounded corner, it is convenient for the core shaft to be inserted into the jack; at the same time, a convex ring 901 can protrude from the hole opening of the formed bushing blank, and the convex ring 901 can be milled off during the later finishing process, so as to further avoid the problem of inner flanging of the hole of the bushing blank.

[0043] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications made above should also be regarded as the protection scope of the present invention.

Claims

1. An improved bushing die-casting mold, comprising a moving mold (10) and a fixed mold (20), characterized in that: The moving mold (10) includes a moving mold block (101), and a plurality of core shafts (102) are fixed on the moving mold block (101); The fixed mold (20) includes a main mold block (201) and a sub-mold block (202) which are separately arranged; a jack (203) corresponding to the core shaft (102) is formed on the main mold block (201), and the core shaft (102) is inserted into the corresponding jack (203).

2. An improved bushing die-casting mold according to claim 1, characterized in that: An installation counterbore (204) is formed in the middle of the main mold block (201); the sub-mold block (202) includes a formed part (2021) and a connecting part (2022) which are integrally formed, and the connecting part (2022) is inserted into and fixed in the installation counterbore (204); The formed part (2021) includes a stepped core column (2023) and a rounded "V"-shaped protrusion (2024) formed on the outer wall of the stepped core column (2023).

3. An improved bushing die-casting mold according to claim 2, characterized in that: A through hole (205) is formed at the bottom of the installation counterbore (204).

4. An improved bushing die-casting mold according to claim 2, characterized in that: A guide block (2025) is formed at the outer end of the rounded "V"-shaped protrusion (2024).

5. An improved bushing die-casting mold according to claim 4, characterized in that: A first rounded corner (2031) is formed at the mouth of the jack (203), and a second rounded corner (1021) is formed at the end of the core shaft (102).

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