During last ten years, change of consumption pattern, variety and modernity of consumers, variety of producers and competitors, changes and vacillation rates, cause developing and decreasing the amounts of produce expenses by using hardware and software progressing, which are so important. In this respect, one of the possible solutions to increase the quality and enjoy the use of software possibilities is to perform producing systems. The aim of this article is to choose, automatic process and WELDing technology by using WELD-EXP. software. In this software, experience and knowledge of skilled men and expert form the rules in the expert system and knowledge base. After interchange of information and receive the necessary data from user, this software by studying and analyzing necessary instances, choose and suggest the best WELDing process or processes. Finally, the users confirm and complete it and present the WELDing process specification (WPS). Therefore, this way is time-consuming and save the expense of making and producing of WELDments.

The importance of WELDed connections on the behavior of steel moment resisting frames was the reason of researchers focus on WELDing details. In this paper result on 32 pilot tests indicate moment connection behavior are presented. In this experimental research, in order to connection strength evaluation, complete joint PENETRATION (cjp) WELD strength with different WELDing procedure, double side fillet WELD out of plane strength, one side fillet WELD out of plane strength and amperage intensity effect on WELDing quality, have been studied. Also in order to connection rehabilitation, rib stiffener effect on connection strength, T-stiffener effect on connection strength, electrode toughness effect on WELDing quality and grinding and rewarding effect on WELDing quality have been studied. Maximum strength of cjp WELD is observed in WELDing with backing. Out of plane strength of double side and on side fillet WELD have been determined. Connection strength increase amount with stiffener strengthening of connection have been proposed. It has also been proposed constructional recommendations about electrode toughness, reWELDing and amperage intensity.

In the present study, effect of current, WELDing speed and preheat temperature during FB-TIG WELDing of AA5083 aluminum alloy was studied. Using the Taguchi method, 9 different tests were designed to investigate the effect of WELDing parameters on the PENETRATION depth. Consistent with predictions, increasing the current and preheat temperature, and reducing the WELDing speed led to an increase in PENETRATION depth. The maximum PENETRATION depth of 8. 02 mm was achieved at the current of 220 A, WELDing speed of 120 mm/min, and the preheat temperature of 100 °C. Taguchi analysis showed that increasing the WELDing current and preheat temperature had a more significant effect than the WELDing speed. Microstructural analysis indicated that the WELD metal is fine-grained, along with coarse-grain in the HAZ of all samples. Many pores were observed in the samples with high WELDing speed and high WELDing current in the fusion zone. The sample with the highest heat input had the highest PENETRATION depth. This sample had the highest elongation, equal to 69% of the base metal. Moreover, microhardness test demonstrated that the hardness of this sample dropped sharply from 70 Vickers to 58 Vickers in the HAZ.

Gas tungsten arc WELDing is fundamental in those industries where it is important to control the WELD bead shape and its metallurgical characteristics. However, compared to the other arc WELDing process, the shallow PENETRATION of the TIG WELDing restricts its ability to WELD thick structures in a single pass (~2 mm for stainless steels), thus its productivity is relativity low. This is why there have been several trials to improve the productivity of the TIG WELDing. The use of activating flux in TIG WELDing process is one of such attempts. In this study, first, the effect of each TIG WELDing parameters on the WELD’s PENETRATION depth was shown and then, the optimal parameters were determined using the Taguchi method with L9 (34) orthogonal array. SiO2 and TiO2 oxide powders were used to investigate the effect of activating flux on the TIG WELD PENETRATION depth and mechanical properties of 316L austenitic stainless steel. A camera was used to observe and record images of the WELDing arc, and analyze the relationship between increasing the PENETRATION depth and arc profile. The experimental results showed that activating flux aided TIG WELDing has increased the WELD PENETRATION, tending to reduce the width of the WELD bead. The SiO2 flux produced the most noticeable effect. Furthermore, the WELDed joint presented better tensile strength and hardness.

With the emergence of industries and their growth, joining different parts to each other has become an important need. Due to the complexity of conventional connection methods, there has been a great deal of interest in research and development of new connection methods in recent years. Therefore, this study was conducted to investigate the joining strength of 5083 aluminum alloy to a polymer-based composite reinforced with carbon black particles. In this study, mechanical properties including shear tensile strength and the effect of reinforcing particles on the thermal conductivity of high density polyethylene were investigated. In this study, the joining was performed by friction stir WELDing process and the WELD point strength was investigated by shear tensile test. Percentage of reinforcing phase added to the polyethylene matrix, dwell time of friction stir spot WELDing machine tools as variables affecting the shear tensile strength were evaluated in this study. The results showed that by increasing the dwell time for pure polyethylene for 15 seconds and for composite samples of carbon black reinforced polyethylene in a time period of 10 seconds, a favorable bond was established and with increasing dwell time Up to 20 seconds due to excessive increase of polyethylene melt strength and residual stresses during the freezing process, a decreasing trend of bond strength was observed.

With the advancement of the construction industry, the use of high-strength steel has gradually increased. High-strength steels can withstand higher stresses compared to conventional steels, yet they exhibit less ductility. Currently, due to their high cost, they are primarily utilized in specialized industries. Connecting two steel pieces requires the use of WELDing or bolts. Fillet WELDing is the simplest and most commonly used type of WELDing. Therefore, investigating this type of WELD in high-strength steel is of great importance. Fillet WELDs can also have different angles in the direction of applied force, which itself affects their strength. In this study, the influence of the WELDing angle on the axis of the applied force has been examined. First, an experimental model, considering the effect of defects in the WELD, was modeled and validated using ABAQUS software. Subsequently, specimens were analyzed at various angles. The maximum strength of the WELD and its ductility were investigated. Additionally, the recommended strength of the American steel code for WELDs at different angles was examined. The results showed a 14% average difference from the code. Unlike mild steels, an increase in the WELDing axis angle with the direction of the applied force increased the ductility of the fillet WELD.

The current study aimed to optimize artificial insemination in aged broiler breeder hens in two experiments. In the first experiment, the effect of (two) different diluted semen temperatures (5 and 25 °C) of Hubbard rooster (40 roosters, 58 weeks of age) on fertility, hatchability and sperm PENETRATION (SP) rate in the perivitelline layer of Hubbard hen (180 hens) were investigated. In the second experiment, three (different) sperm concentrations (100 (C100), 200 (C200), and 400 (C400) million sperm in 0.25 mL per hen) of Hubbard roosters (40 roosters, 62 weeks of age) on fertility, hatchability and SP rate of Hubbard broiler breeder hens (270 hens) were explored. In the first experiment, the results showed that the temperature of 5 °C of diluted semen compared to the 25 °C, increased percentage of hatchability of set eggs, hatchability of fertile eggs, and SP and decreased early embryonic mortality. The results of the second experiment showed the highest percentage of fertility and SP rate were observed at treatment C400. Also, in this experiment that highest percentage of hatchability of set eggs and hatchability of fertile eggs and lowest early embryonic mortality were observed at treatment C400. Return on investment (ROI) of the treatments C200 and C400 was approximately 2.9 and 1.4, respectively. In overall, the results of this study showed that (in attention to ROI and hatchability) to optimize artificial insemination of aged broiler breeder hens we can use a sperm concentration of 200 to 400 million in 0.25 mL per hens at 5 °C.