Non-trimming closed type tyre die forging technological method of middle part punched black skin kind forged piece

A process method and a flash-free technology, applied in the field of forging technology, can solve the problems of increased raw material consumption, unsatisfactory filling, and increased cost of forgings, and achieve the effect of reducing the amount of machining, reducing the cost of forging, and saving the cost of raw materials and molds.

Inactive Publication Date: 2005-03-23
YONGJI ELECTRIC FORGING & PRESSING
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in the production process, when forgings are formed, the phenomenon of not being able to reach corners and not being fully filled often occurs; in order to overcome the phenomenon of not being able to reach corners and

Method used

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  • Non-trimming closed type tyre die forging technological method of middle part punched black skin kind forged piece
  • Non-trimming closed type tyre die forging technological method of middle part punched black skin kind forged piece
  • Non-trimming closed type tyre die forging technological method of middle part punched black skin kind forged piece

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Embodiment Construction

[0011] This specific embodiment takes forging an oil seal as an example. The oil seal is a black leather pie forging with a hole punched in the middle.

[0012] The non-flash closed tire die forging process method of the oil seal includes the preparation of the blank, putting the blank into the forging die for forging and pressing, first punching the surface of the blank, and then turning it over and putting it into the forging die for forging forming.

[0013] Using the billet mold shown in Figure 2 with known forging or stamping technology, the surface of the billet is punched and concaved to form figure 1 As shown in the punched blank, then turn the punched blank (that is, the punched downward) into the forging die for forging and forming (see attached image 3 ). Take out the formed forging, punch a hole in the middle part of the forging with known free forging equipment, and complete the final forming of the oil seal (see attached Figure 4 ).

[0014] The diameter o...

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Abstract

A die forging technology for manufacturing black-surface pie-shaped workpiece without excessive edge includes such steps as making raw blank, loading it in a close die, punching on its surface to form a central recess, turning over the blank, and die forging.

Description

technical field [0001] The invention relates to a forging process, in particular to a flash-free closed tire die forging process for a black leather pie forging with a hole punched in the middle. Background technique [0002] The material used for flash-free closed tire die forging is accurate. After the forging is formed, there is no need to cut off excess metal materials. The consumption of raw materials is low, saving raw materials, and eliminating the trimming process, which saves mold materials for trimming. Therefore, the non-flash closed tire die forging has been widely used in the processing of black leather cake forgings, especially the black leather cake forgings with punching holes in the middle. However, in the production process, when forgings are formed, the phenomenon of not being able to reach corners and not being fully filled often occurs; in order to overcome the phenomenon of not being able to reach corners and not being fully filled, the existing technol...

Claims

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Application Information

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IPC IPC(8): B21J1/02B21J5/02
Inventor 薛芳兰李兰圃牟景林
Owner YONGJI ELECTRIC FORGING & PRESSING
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