What is the effect of temperature and time on the welding effect?
Release time:
2023-02-26
【Summary Description】 Weld effect 1. What is the effect of the amount of flux and the temperature and time of welding on the welding effect? With the development of high quality and high efficiency of welding technology, the proportion of welding structure in metal structure is increasing. However, due to the welding thermal cycle, welding residual stress must exist in the welded structure. Generally, the residual stress distribution in the welded structure at room temperature is uneven, especially the residual tensile stress in the weld and near-seam area often leads to the decline of the service performance of the welded structure. Most of the welding temperature control is carried out by the field operator according to the experience, it is difficult to achieve timely and accurate adjustment in one step. The welding temperature is high, the weld is burned, the formation of perforation; low welding temperature, the weld burn through, the formation of incomplete penetration, affecting the quality of the weld, defective products, not only affect the production efficiency of the product, but also cause waste of raw materials. Therefore, controlling the welding temperature and ensuring the welding quality play a decisive role in improving the quality of products. Based on this, this paper analyzes the influence of welding temperature on welding quality. How to improve the welding effect? (1), the use of high precision assembly tooling to improve the assembly accuracy of weldments. (2), the preparation of welding robot special welding process, the size of the parts, weld groove, assembly size for strict process regulations. General parts and groove size tolerances are controlled within ± 0.8mm, assembly size errors are controlled within ± 1.5mm, and the probability of welding defects such as pores and undercuts in welds can be greatly reduced. (3), the weld should be cleaned, no oil, rust, welding slag, cutting slag and other debris, allowing a weldable primer. Otherwise, it will affect the success rate of arc. Tack welding is changed from electrode welding to gas shielded welding, and at the same time, the spot welding part is polished to avoid residual slag shell or pores due to tack welding, thus avoiding arc instability and even spatter.
Weld effect
1. What is the effect of the amount of flux and the temperature and time of welding on the welding effect?
With the development of high quality and high efficiency of welding technology, the proportion of welding structure in metal structure is increasing. However, due to the welding thermal cycle, welding residual stress must exist in the welded structure. Generally, the residual stress distribution in the welded structure at room temperature is uneven, especially the residual tensile stress in the weld and near-seam area often leads to the decline of the service performance of the welded structure. Most of the welding temperature control is carried out by the field operator according to the experience, it is difficult to achieve timely and accurate adjustment in one step. The welding temperature is high, the weld is burned, the formation of perforation; low welding temperature, the weld burn through, the formation of incomplete penetration, affecting the quality of the weld, defective products, not only affect the production efficiency of the product, but also cause waste of raw materials. Therefore, controlling the welding temperature and ensuring the welding quality play a decisive role in improving the quality of products. Based on this, this paper analyzes the influence of welding temperature on welding quality.
How to improve the welding effect?
(1), the use of high precision assembly tooling to improve the assembly accuracy of weldments.
(2), the preparation of welding robot special welding process, the size of the parts, weld groove, assembly size for strict process regulations. General parts and groove size tolerances are controlled within ± 0.8mm, assembly size errors are controlled within ± 1.5mm, and the probability of welding defects such as pores and undercuts in welds can be greatly reduced.
(3), the weld should be cleaned, no oil, rust, welding slag, cutting slag and other debris, allowing a weldable primer. Otherwise, it will affect the success rate of arc. Tack welding is changed from electrode welding to gas shielded welding, and at the same time, the spot welding part is polished to avoid residual slag shell or pores due to tack welding, thus avoiding arc instability and even spatter.
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