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Composite overlay-welding manufacturing method for punching pin

A manufacturing method and technology of perforating needles, which are applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of long service life and other problems, and achieve the effects of improving service life, strong impact resistance and high strength

Active Publication Date: 2018-12-14
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the domestic and foreign markets, punches, mandrels and piercing needles are generally manufactured by surfacing welding, but there are still big problems in their service life.

Method used

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  • Composite overlay-welding manufacturing method for punching pin
  • Composite overlay-welding manufacturing method for punching pin
  • Composite overlay-welding manufacturing method for punching pin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] This embodiment proposes a combination of two materials, YD212-1 flux core and cobalt-based electrode D802, for surfacing welding to manufacture the perforating needle head to manufacture a composite perforating needle. like figure 1 As shown, the specific method is as follows:

[0026] Welding method: using CO 2 Gas shielded welding + manual arc welding.

[0027] Welding sequence: first use CO at the needle head part of the punching needle parent body 2 Gas-shielded welding ring-shaped surfacing welding needle head, the welding wire used is YD212-1 flux-cored welding wire, and then cobalt-based electrode D802 is surfacing on the outermost side of the needle head, so that the total cross-sectional area of ​​flux-cored welding wire and cobalt-based electrode surfacing is 1 Calculated, the cross-sectional area of ​​the circular surfacing welding of medicinal welding wire is 11 / 12.

[0028] Welding material: CO 2 YD212-1 flux-cored wire for gas shielded welding, cobal...

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Abstract

The invention discloses a composite overlay-welding manufacturing method for a punching pin. A welding wire for a hot-working die and a cobalt-based welding rod are overlay-welded regionally at a punching pin body tip area, so that the composite manufacturing of the punching pin is realized, and the service life of the punching pin is greatly prolonged; and the method can be further applied to therepair work of the punching pin. The cobalt-based welding rod is overlay-welded at the part in the most rugged service environment, and the superiority of the cobalt-based welding rod is fully played, so that the high-temperature performance of a punch is effectively improved; and the YD212-1, YD337-1 or YD397-1 welding wire with the good comprehensive performance is overlay-welded at other parts. Due to the use of the cobalt-based welding rod, the expected life can be prolonged greatly, the phenomenon of peeling is not likely to occur, the metallurgical bonding of atoms is fully realized, the strength is higher, and the impact resistance is higher.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a method for manufacturing perforated needle composite surfacing welding. Background technique [0002] At present, in industrial production, 5CrNiMo and 5CrMnMo integral mold steels are generally used to manufacture perforating needles, which are put into use after quenching and tempering. After heat treatment, the surface hardness of the perforating needle is about HRC48. The piercing needles manufactured integrally with 5CrNiMo and 5CrMnMo die steels had very low life, and production results showed that the head was worn, fatigued, or cracked after making a dozen workpieces. The life of the perforating needle is short, and it is frequently replaced during work, and it is difficult to guarantee the dimensional tolerance of the steel pipe produced, which not only affects the production efficiency, but also affects the product quality. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/04B23K9/16B23K9/235
CPCB23K9/00B23K9/046B23K9/16B23K9/235
Inventor 刘大双吴铭方魏萍
Owner JIANGSU UNIV OF SCI & TECH
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