The basic operation of SMAW Abstract: The multi-function laser processing machine computer control system for linear motor high-speed feeding system performance optimization of large sculptured surface parts NC programming the key reaming and reamer of the basic concepts of processing long crankshaft with moving the grinding technology Butt Gap TIG helium arc welding of tantalum sheet impact of the molten pool shape numerical analysis of the difficulties of the development of special purpose machine laser cutting welding puzzle craft fatigue behavior of CNC machining in the automotive application, post-processing way to purchase single-phase Electronic Energy Meter attention to matters of domestic mechanical CAD design offline programming of robot arc welding system coordinated movement of CNC punch press process design process, analysis and processing Introduction to CNC machine tools Category About Chongqing Machine Tool shaving gear machine columns national key new product mechanical term Sandvik Coromant introduces new grades of cast iron milling into why the valve market mainstream products? programming of CNC milling and process analysis [tags: tag] electrode arc welding is the mask thinking tool for enterprise development strategies under the current situation observation and operation. Due to poor visibility, poor working conditions. To ensure the welding quality, not only require more skilled manipulation techniques should also attention is highly concentrated. Beginners to practice when appropriate: current electrode to the arc of short, fast welding speed not strive uniform. Workpiece prior to welding joints on both sides of 20mm within the
The SMAW masks under the observation and operation. Due to poor visibility, poor working conditions. To ensure the welding quality, not only require more skilled manipulation techniques should also attention is highly concentrated. Beginners to practice when appropriate: current electrode to the arc of short, fast welding speed not strive uniform.
Prior to welding, the workpiece joints on both sides of 20mm within the surface cleaning should be clean (remove rust, oil, water), and the electrode end of the metal core exposed to short-circuit arc. Arc method of percussion and friction law; which the friction law is relatively easy to grasp, suitable for beginners arc operation.
(1) scratch --- first electrode at the weldment, then scratch like strike a match in the weldment surface gently ignited the arc Welding Rod, welding rod and then quickly lift the 2-4mm, and stable combustion,
(2) alignment of the percussion method --- the electrode end of the weldment, and then bend under the wrist, so that the Welding Electrode to a slight touch weldment, and then quickly lift the 2 ~ 4mm electrode, ignition arc wrist flat, so that the arc to keep stable combustion. This arc method does not make the weldment surface scratches, but also from the weldment surface of the limitations of size, shape, so the arc method is mainly used in production. But the operation is difficult to grasp the need to improve proficiency.
Figure 1 arc method a) Watch France b) the scratched France
The arc should pay attention to the following matters:
1) arc Department should be no oil, water, rust, in order to avoid pores and slag.
2) electrode in contact with the weldment enhance the speed should be appropriate, too fast, difficult to arc, the slow welding wire and pieces of stick together causing a short circuit.
(2) transported Article
The transport bar is the most important aspects of the welding process, which directly affects the appearance of forming and the intrinsic quality of the weld. , Under normal circumstances after the arc ignition electrode there are three basic movements: direction toward the bath gradually taken to gradually move along the welding direction, horizontal swing.
Electrode toward the bath the direction of gradually sent - both to add metal to the weld pool, electrode melting continue to maintain a certain arc length, electrode feeding speed should be the same as the electrode melting rate. Otherwise, it will be broken arc or stick welding on.
Electrode moves along the welding direction --- with the continuous melting of the electrode, and gradually form a weld. Electrode move too slow, the weld is too high, too broad, irregular shape, burn-through phenomenon occurs when welding sheet; if the electrode's moving too fast, then the electrode and the weldment will melt uneven weld bead narrow, and even the phenomenon of incomplete penetration. When electrodes move with the forward direction at the angle of 70-80 degrees, so that the molten metal and slag to the rear, or in front of the slag flow of arc, caused by defects such as slag.