How to choose welding groove for hydraulic press?
With the increase of the stable rate of the mechanical market, hydraulic presses are widely used, in which the three-beamfour-column hydraulic pressIt is a representative product. The increasingly fierce competition in the industry will also promote the diversified development of hydraulic presses. It is suitable for metal stamping, bending, flanging or shallow stretch forming and cold extrusion processes. It is also suitable for the pressing forming process of metal powder products and the pressing forming of non-metallic materials such as plastics, glass fiber reinforced plastics, insulating materials and abrasives. It is also suitable for correction and press fitting processes.
In order to ensure the quality of welded joints in hydraulic press manufacturing, the shape and size of the welding groove should be correctly selected. The purpose of this is to ensure full penetration of the welded joints. First of all, the thickness of the welded material should be considered. For the welding of thin steel plates, the end of the steel plate can be directly used for welding. For the welding groove of medium and heavy plates, the welding method should be considered at the same time; for example, the primary penetration depths of manual arc welding and submerged arc automatic welding are 6 8mm and 12-14mm respectively. When welding 14mm thick steel plates, if submerged arc automatic welding is adopted, I-shaped groove can be used. If manual arc welding is adopted, single-sided or double-sided groove can be designed. Secondly, the hydraulic machine should pay attention to the processing method of groove, such as I-shaped, V-shaped, X-shaped and other grooves, gas cutting and plasma cutting can be used, while U-shaped double U-shaped groove needs to be processed by planer. Under the same conditions, the welding deformation of different forms of groove is different, such as single-sided groove is larger than double-sided groove deformation, while V-shaped groove is larger than U-shaped groove deformation, etc. Attention should be paid to reducing residual welding deformation and stress as much as possible.
The design or selection of welding groove of hydraulic press should pay attention to the weldability during welding. For example, for containers with small diameter, it is not suitable to design double-sided groove, but to design single-sided outward groove, etc. At the same time, attention should be paid to convenient operation. Pay attention to the consumption of welding materials, and make the filler metal of the weld as little as possible. For welded joints with the same plate thickness, the consumption of welding materials is also different due to different groove forms. For example, single-sided V-shaped groove consumes more welding materials than single-sided U-shaped groove, and the cost will increase. The groove of the composite steel plate should be beneficial to reduce the dilution rate of transition layer weld metal.
Hydraulic machine welding groove process introduction?
The shape and size of welding groove should be correctly selected in the manufacture of hydraulic press, which is an important welding process and an important process measure to ensure the quality of welded joints in the manufacture of hydraulic press. In the hydraulic press manufacturing design, selection of welding groove process should consider the following issues.
1. The main purpose of hydraulic press manufacturing design or selection of different forms of groove is to ensure full penetration of welded joints.
2. The first thing to consider in the manufacturing design or selection of the groove of the hydraulic press is the thickness of the welded material. For the welding of thin steel plate, the end of the steel plate can be directly used for welding; for the welding groove of medium and thick plates, the welding method should be considered at the same time. For example, manual arc welding and automatic submerged arc welding have a penetration depth of 6 ^ 8mm and 12-14mm respectively. When welding 14mm thick steel plates, if automatic submerged arc welding is used, I-shaped groove can be used. If manual arc welding is used, single-sided or double-sided groove can be designed.
3, hydraulic machine manufacturing should pay attention to the groove processing method, such as I-shaped, V-shaped, X-shaped groove, can use gas cutting, plasma cutting processing, and U-shaped, double U-shaped groove, you need to use the edge machine processing.
4, under the same conditions, different forms of groove, the welding deformation is different. For example, the deformation of single-sided groove is larger than that of double-sided groove, and the deformation of V-shaped groove is larger than that of U-shaped groove. Care should be taken to minimize residual welding distortion and stress.
5. The design or selection of welding groove of hydraulic press should pay attention to the weldability during welding. For example, a container with a small diameter should not be designed as a double-sided groove, but should be designed as a single-sided outward groove. At the same time, attention should be paid to convenient operation.
6. Pay attention to the consumption of welding materials, and make the filler metal of the weld as little as possible. For welded joints with the same plate thickness, the consumption of welding materials is different in different forms of grooves. For example, a single-sided V-shaped groove consumes more welding material than a single-sided U-shaped groove, and the cost will increase.
7. The groove of the composite steel plate should be conducive to reducing the dilution rate of the transition layer weld metal.