Fork type special-shaped forge piece shaping die

Abstract

The utility model belongs to the field of forge piece machining, and particularly relates to a forked special-shaped forge piece shaping die which comprises an upper die base, a lower die base, an upper die plate fixed to the bottom of the upper die base and a lower die block fixed to the upper portion of the lower die base, a lower die core is arranged in the middle of the lower die block, and a concave cavity is formed in the position, corresponding to the lower die core, of the lower die block. A concave cavity is formed in the lower die block, an elastic piece is arranged at the bottom in the concave cavity, the lower die core is arranged in the concave cavity, cavities matched with forge pieces in shape are formed in the positions, located on the two sides of the lower die core, of the lower die block, a lifting mechanism is installed on the lower die base, two ejector rods are arranged at the output end of the lifting mechanism, and the ejector rods are correspondingly arranged below the cavities respectively. The shaping device is simple in structure, the defective product rate of products is greatly improved from original 40% to about 0.5%, waste of materials is greatly reduced, the production cost is reduced, the production efficiency is improved, and the quality problem of the products is well controlled.

Description

Technical Field

[0001] The utility model belongs to the field of forging processing, and in particular relates to a shaping die for fork-shaped special-shaped forgings. Background Art

[0002] At present, in the forging industry, there are many types of fork-shaped special-shaped forgings, which account for a large proportion. For such fork-shaped special-shaped forgings, the current process route is: blanking - heating - upsetting - pre-forging - final forging - trimming - heat treatment - shot peening - inspection - storage, and the qualified rate of forgings reaches 99.5%. However, in the production of Figure 1 During the production of the fork products shown in the figure, on-site inspections found that the relative distance dimensions of the forks fluctuated greatly. The maximum size difference of products produced in the same batch was about 1mm, and the defective rate was as high as 40%. The main reason was that the thin wall 00 of the forging was too thin, and hot forgings were easily affected by force and deformed. When trimming, the forging as a whole was pressed by downward force, so corresponding deformation would occur after trimming. When the product thickness is sufficient, this deformation is negligible and can be ignored. The wall thickness of the thin wall in the figure is too thin, which makes the deformation after trimming particularly obvious. Announcement No. CN 202984560 U discloses a pre-forging die for a flange fork on the end face of a transmission shaft, which uses upper and lower dies to trim the fork ears of the fork final forging. However, during the trimming process, the upper die is likely to leave marks on the forging when pressing down, causing defects in the product.

[0003] Therefore, the above problems are issues that should be considered and solved during the production process of the above-mentioned fork forgings. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a shaping device so that such fork-shaped special-shaped forgings can still be forcibly corrected after deformation, thereby solving the problem of product size deviation.

[0005] The specific technical solution of the present utility model is as follows: The present utility model provides a fork-type special-shaped forging shaping die, including an upper die base, a lower die base, an upper die plate fixed at the bottom of the upper die base, and a lower die block fixed above the lower die base. A lower die core is provided in the middle of the lower die block, and a concave cavity is provided at the lower die block corresponding to the lower die core. An elastic part is provided at the bottom of the concave cavity, and the lower die core is placed in the concave cavity. A cavity that matches the shape of the forging is provided on both sides of the lower die core on the lower die block, and a lifting mechanism is installed on the lower die base. Two push rods are provided at the output end of the lifting mechanism, and the push rods are respectively arranged below the cavity.

[0006] A further improvement of the present utility model is that: a cushion block is provided at the output end of the lifting mechanism, and the push rod is arranged on the cushion block.

[0007] A further improvement of the present invention is that a chamfer is provided at the opening of the cavity, and the chamfer radius is 5mm-15mm.

[0008] A further improvement of the present invention is that a limiting groove is provided at the bottom of the lower mold core, and a positioning column adapted to the limiting groove is fixed in the middle of the concave cavity.

[0009] A further improvement of the present invention is that: the elastic member is a telescopic spring, and the telescopic spring is sleeved on the outside of the positioning column.

[0010] A further improvement of the present invention is that a push rod hole is provided inside the lower module just below the cavity.

[0011] A further improvement of the present invention is that the top of the lower mold base is a lower mold plate, the middle of the lower mold plate is a cavity, the pad is located in the cavity, and the lower mold plate is provided with a through hole for the ejector rod and the output end of the lifting mechanism to pass through.

[0012] A further improvement of the present invention is that the upper die plate and the upper die base, as well as the lower die plate and the lower die base are fixedly connected by bolts.

[0013] A further improvement of the present invention is that the lifting mechanism is an oil cylinder or a pneumatic cylinder.

[0014] The beneficial effects of the utility model are as follows: its structure is simple, the shaping device utilizes the lower die core and the cavity to shape the fork portion of the forging, and the elastic member provided effectively avoids leaving marks on the forging when the die is pressed down and can automatically rebound, thereby avoiding secondary damage to the forging, thereby greatly improving the defective rate of the product from the original defective rate of up to 40% to about 0.5%, thereby greatly reducing material waste, reducing production costs, improving production efficiency, and controlling product quality issues. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the lower module of the utility model;

[0017] Figure 3 It is a schematic diagram of the forging structure in the utility model;

[0018] Among them, 1-upper die base, 2-lower die base, 3-upper template, 4-lower module, 5-lower mold core, 6-concave cavity, 7-elastic part, 8-limiting groove, 9-positioning column, 10-cavity, 11-chamfer, 12-lifting mechanism, 13-pad, 14-elevator, 15-lower template, 16-elevator hole. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection.

[0020] This embodiment provides a fork-type special-shaped forging shaping die, including an upper die base 1, a lower die base 2, an upper die plate 3 fixed at the bottom of the upper die base 1, and a lower die block 4 fixed above the lower die base 2. The upper die plate 3 and the upper die base 1, and the lower die block 4 and the lower die base 2 are fixedly connected by bolts.

[0021] A lower mold core 5 is provided in the middle of the lower module 4, and a concave cavity 6 is provided in the lower module 4 corresponding to the lower mold core 5. An elastic member 7 is provided at the bottom of the concave cavity 6. The lower mold core 5 is placed in the concave cavity 6, and a limiting groove 8 is provided at the bottom of the lower mold core 5. A positioning column 9 adapted to the limiting groove 8 is fixed in the middle of the concave cavity 6, and the elastic member 7 is a telescopic spring, which is sleeved on the outside of the positioning column 9.

[0022] The lower die block 4 is provided with cavities 10 on both sides of the lower die core 5 that match the shape of the forging 0. The opening of the cavity 10 is provided with a chamfer 11 with a chamfer radius of 10 mm.

[0023] A lifting mechanism 12 is installed on the lower die base 2. The lifting mechanism 12 is an oil cylinder. A pad 13 is provided at the output end of the oil cylinder. Two ejector rods 14 are provided above the pad 13. The ejector rods 14 are respectively arranged below the two cavities 10. An ejector rod hole 16 for the ejector rod 14 to pass through is provided inside the lower module 4 corresponding to the cavity 10.

[0024] The top of the lower die base 2 is a lower die plate 15 , the middle of the lower die plate 15 is a cavity, the cushion block 13 is located in the cavity, and the lower die plate 15 is provided with a through hole for the ejector rod 14 and the output end of the oil cylinder to pass through.

[0025] The present embodiment provides a fork-type special-shaped forging shaping die, and its working principle is as follows: the upper die base 1 is connected to the punch, and the punch parameters are first adjusted to control the shaping height, and the forging 0 is placed downward on the lower die core 5, and the lower die core 5 plays a positioning role; a spring 7 is installed inside the lower die core to avoid leaving marks on the forging 0 when pressing down, and it can automatically rebound to facilitate the next shaping, and then the punch is controlled to make the upper template 3 force the forging into the cavity 10 of the lower module 4. The chamfer 11 on the cavity 10 can guide the fork head part 01 of the forging 0 into the cavity 10, and finally step on the oil inlet switch to make the oil cylinder operate upward, pushing the pad 13 and the push rod 14 in turn to eject the forging 0, completing the shaping of the product.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A fork-shaped forging shaping die, comprising an upper die base, a lower die base, an upper die plate fixed at the bottom of the upper die base, and a lower die plate fixed above the lower die base, characterized in that: A lower die core is provided in the middle of the lower die block, a concave cavity is provided at the position of the lower die block corresponding to the lower die core, an elastic part is provided at the bottom of the concave cavity, the lower die core is placed in the concave cavity, and cavities matching the shape of the forging are provided on both sides of the lower die core on the lower die block, a lifting mechanism is installed on the lower die base, two push rods are provided at the output end of the lifting mechanism, and the push rods are respectively arranged below the cavities.

2. A fork-shaped special-shaped forging shaping die according to claim 1, characterized in that: A cushion block is provided at the output end of the lifting mechanism, and the push rod is arranged on the cushion block.

3. A fork-shaped special-shaped forging shaping die according to claim 1, characterized in that: The opening of the cavity is provided with a chamfer, and the chamfer radius is 5mm-15mm.

4. A fork-shaped special-shaped forging shaping die according to claim 1, characterized in that: A limiting groove is provided at the bottom of the lower mold core, and a positioning column adapted to the limiting groove is fixed in the middle of the concave cavity.

5. A fork-shaped special-shaped forging shaping die according to claim 4, characterized in that: The elastic member is a telescopic spring, and the telescopic spring is sleeved on the outer side of the positioning column.

6. A fork-shaped forging shaping die according to claim 1, characterized in that: A push rod hole is provided inside the lower module just below the cavity.

7. The fork-shaped special-shaped forging shaping die according to claim 2, characterized in that: The top of the lower mold base is a lower mold plate, the middle of the lower mold plate is a cavity, the cushion block is located in the cavity, and the lower mold plate is provided with a through hole for the ejector rod and the output end of the lifting mechanism to pass through.

8. The fork-shaped special-shaped forging shaping die according to claim 1, characterized in that: The upper mold plate and the upper mold base, as well as the lower mold plate and the lower mold base are fixedly connected by bolts.

9. The fork-shaped special-shaped forging shaping die according to claim 1, characterized in that: The lifting mechanism is an oil cylinder or a gas cylinder.

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