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Nut welding technology

A welding process and welding tooling technology, applied in the field of nut welding process, can solve the problems of unstable welding state, large contact surface, poor welding quality, etc., and achieve the effects of good processing quality, small size deviation and simple process

Inactive Publication Date: 2017-11-07
HEFEI ANLI ELECTRIC POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The contact surface of the upper and lower electrodes of the welding tool is large, and the instantaneous current is small, resulting in unstable welding status and poor welding quality

Method used

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  • Nut welding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] combine figure 1 , a nut welding process provided by the present embodiment, the nut welding process includes the following steps:

[0030] The first is to prepare materials: prepare the parts to be welded, welding nuts, and welding fixtures. The welding fixture is a set of flexible fixtures for welding fixation, compression, and positioning. In the material preparation process, the cross section of the lower electrode is reduced so that the extension of the cross section becomes a quadrilateral circumscribed circle formed by the four welding feet of the nut, and the length of the lower electrode is elongated at the same time;

[0031] Then pre-treat the welding raw materials: blow off the surface impurities of the welding parts, welding nuts and welding tooling with an air gun respectively, keep them clean, and facilitate the subsequent welding process;

[0032] Then process the nut: use a cold heading machine to cold-head the nut, and cold-head three times in a row t...

Embodiment 2

[0042] combine figure 1 , a nut welding process provided by the present embodiment, the nut welding process includes the following steps:

[0043] The first is to prepare materials: prepare the parts to be welded, welding nuts, and welding fixtures. The welding fixture is a set of flexible fixtures for welding fixation, compression, and positioning. In the material preparation process, the cross section of the lower electrode is reduced so that the extension of the cross section becomes a quadrilateral circumscribed circle formed by the four welding feet of the nut, and the length of the lower electrode is elongated at the same time;

[0044] Then pre-treat the welding raw materials: blow off the surface impurities of the welding parts, welding nuts and welding tooling with an air gun respectively, keep them clean, and facilitate the subsequent welding process;

[0045] Then process the nut: use a cold heading machine to cold-head the nut, and cold-head three times in a row t...

Embodiment 3

[0055] combine figure 1 , a nut welding process provided by the present embodiment, the nut welding process includes the following steps:

[0056] The first is to prepare materials: prepare the parts to be welded, welding nuts, and welding fixtures. The welding fixture is a set of flexible fixtures for welding fixation, compression, and positioning. In the material preparation process, the cross section of the lower electrode is reduced so that the extension of the cross section becomes a quadrilateral circumscribed circle formed by the four welding feet of the nut, and the length of the lower electrode is elongated at the same time;

[0057] Then pre-treat the welding raw materials: blow off the surface impurities of the welding parts, welding nuts and welding tooling with an air gun respectively, keep them clean, and facilitate the subsequent welding process;

[0058] Then process the nut: use a cold heading machine to cold heading the nut, and cold heading twice in a row to ...

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Abstract

The invention belongs to the technical field of welding methods, and provides a nut welding process and material preparation; welding raw material pretreatment: use an air gun to blow off impurities on the surface of the welding parts, welding nuts, and welding tooling; Cold heading forming, continuous cold heading 2-3 times, so that the corners of the nut are full and consistent, punch out a through hole in the center of the nut with a cold heading machine; take the center hole of the nut as the positioning reference, use the cold heading machine to make the formed Upsetting multiple welding points with the same height at the edge of one end face of the nut; use a tapping machine to process internal threads in the center hole of the nut to form a welding nut; check welding parameters; feeding; welding; post-heating: welding The final parts are welded at a current of 20000A for 20ms; inspection: inspect the welded products. The purpose of the present invention is to provide a nut welding process, the welding process is simple, easy to operate, and it meets the performance requirements of welding nuts.

Description

technical field [0001] The invention belongs to the technical field of welding methods, and in particular relates to a nut welding process. Background technique [0002] Weld nuts are fasteners that have internal threads and are used in conjunction with bolts. A mechanical part that has an internal thread and is used in conjunction with a screw to transmit motion or power. [0003] Welding nut parts with high penetration depth, because the nut welding leg is short and inconsistent with the plate material, the common nut welding process is to use ordinary projection welding equipment and tooling to operate, and the welding process is mature, which cannot meet the above requirements. [0004] In the case of the same current, it is particularly easy to cause the situation that the plate has not yet melted and the solder leg of the nut has melted. After slicing the gold image, it was found that there was no penetration between the plate and the nut, which made it difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 殷世尧
Owner HEFEI ANLI ELECTRIC POWER ENG CO LTD
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