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Thin layer welding repair technology for forging die cavity

A mold and cavity technology, which is applied in the field of forging mold repair technology, can solve the problems of long time-consuming, less repair times, high cost, etc., and achieve the effects of avoiding undercutting, reducing production costs, and eliminating internal stress in the organization

Inactive Publication Date: 2005-11-30
HUBEI TRI RING FORGING
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of traditional repair methods, such as high cost, long time, and few repair times, and provide a thin-layer welding repair process for forging mold cavity that can be used for the overall repair of mold cavity.

Method used

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  • Thin layer welding repair technology for forging die cavity

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Embodiment Construction

[0008] refer to figure 1 As shown, first expand the mold cavity evenly by 3-5mm, generally using a milling machine, then heat the mold as a whole to 350-400°C and maintain this temperature for welding repair, heat the welding rod to 300-350°C and keep it at 40-70 Minutes, it is used for welding repair after it is naturally lowered to normal temperature. During electric welding, start from the peripheral edge 1 of the mold cavity, weld the entire circumference of edge 1, and then gradually carry out welding repairs to the middle of the mold cavity 2 based on this circumference , and finally ends in the middle 2, its welding repair track is similar to concentric circles, and adopts multi-layer welding, such as figure 1 The first layer 3 is welded first, and then the second layer 4 is welded, and so on. The thickness of each layer of welding repair is controlled between 0.8-1.5mm, and each layer starts from the edge 1 and ends at the middle of the mold cavity 2 , until it slight...

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Abstract

Thin layer repair welding technique for forging mould cavity overcomes the shortcomings in traditional method with much cost, great time consumption and less repair times, which uses series steps comprised integral heating welding, circle-to-mid turns and multiple layers welding of controlling layer thickness to cut repair time and cost obviously, reliable for quality, fit to repair more than ten times and prolong mould service life.

Description

technical field [0001] The present invention relates to a forging die, in particular to a repairing process of a forging die. Background technique [0002] Forging is one of the commonly used technologies in the production of mechanical products. The mold used for forging is the key to product forming. However, due to the repeated strong forging of the mold during forging, after a certain period of time, the mold cavity will have different degrees of geometric expansion, and Cracks occur in some parts. When this happens, the overall drop repair method is generally used, but this traditional method is expensive and time-consuming, and the number of repairs to the mold is generally less than 3-5 times. In recent years, there is a mold repair method that directly uses welding repair, which is to use a high-hardness welding rod that meets the requirements of the mold and directly weld it in the mold cavity to restore the original size of the mold cavity. It is immature and comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P6/00
Inventor 胡道财张运军曹世金余国林
Owner HUBEI TRI RING FORGING
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