The use of industrial robots has become a trend because the use of independent and responsive systems can increase productivity and reduce the cost per unit of a company's products. An independent Ethercat computer-aided design robot is connected to the robot for welding operations, which improves the economics of the welding operation.
ARC, of ​​Houston, Texas, USA, is an expert in the production of welding and cutting equipment. The company's products are used in the oil and gas industry for up to 90% of its products, and its users are distributed around the world. ARC's automated welding and cutting equipment uses standard computer-aided design techniques that are popular on the market, ensuring long-term use. In contrast, when selecting the control device of the device, ARC Company mostly adopts the disconnected control system for the competition. The reason is that the control system is a unique design, and there are few problems in the subsequent maintenance and repair phase, ARC is convinced.
Automation for fast plasma weldingFor a long time, countless users of ARC have used the company's plasma welding equipment. Plasma welding is economical compared to laser welding, but the disadvantage is that laser welding alone does not meet the requirements during a short welding cycle. The reason for this is that although the conventional plasma welding apparatus has high welding quality, the plasma welding operation is very slow compared to the use of the laser welding apparatus, and a high heat input is required for the operation.
Figure 1 ARC-11-RB welding robot is an automated welding robot for assembly and liquid cleaning equipment.
In order to improve the efficiency of plasma welding, ARC has developed a new welding method in its own laboratory, namely triple pulse welding. This new welding method was developed on the basis of the famous tungsten inert gas welding method. The basic idea of ​​the triple pulse welding method is based on the use of three different intensities of current to achieve a higher heat transfer rate in the case of weak thermal energy. Using this method, the plasma welding apparatus can achieve similar welding efficiency to the laser welding apparatus, and at the same time is economical.
Commissioned by a large user in Texas, ARC developed the ARC-11 RB automated welding robot for the installation of liquid cleaning equipment (Figure 1). For this reason, the triple pulse welding method has been integrated for the first time. The ARC-11 RB automated welding robot is equipped with Beckhoff's CX1010 embedded PC and control unit Twincat NC PTP (Figure 2), and its software system uses WINOOWs XP. The embedded PC is compact and arranged in a box for controlling the entire welding device. It also includes gantry cranes in the control shop, robot functions, operating surfaces, inductive heating components, welded workpiece transport and all uses. Compressed air working parts.
Figure 2 Beckhoff's CX1010 embedded PC with Twincat NC PTP software controls the entire ARC-11-RB welding process
Thanks to the above technology, the entire welding process is accelerated and the automation of the various steps of the entire welding operation is achieved. The entire welding operation is carried out by gantry cranes in the workshop lifting the tubes cut to the rated length and feeding them into a tensioning device (Fig. 3).
At the same time, the welding robot grabs a terminal ring from the conveyor belt and places it into the second set of tie rods for positioning (Fig. 4).
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