What is the role of nc machine tools in sheet metal processing?

Author：Web　Source：Web　Date：2018-08-01 09:45:58　Sentiment：115

In the manufacturing process of non-standard equipment, a large number of non-standard sheet metal parts need to be processed. Along with the continuous progress of China's economy and science and technology, CNC machine tools have the characteristics of strong adaptability to the workpiece modification, high processing precision and high productivity. Therefore, numerical control technology has been widely used in sheet metal machine tools. It solves the problems of high precision, complex shape, irregular shape, large batch and so on in sheet metal processing. Meanwhile, the simple operation of numerical control system also greatly reduces the labor intensity of workers.

In the manufacturing process of non-standard equipment, a large number of non-standard sheet metal parts need to be processed. The shape of sheet metal parts is not fixed. The introduction of numerical control technology has been widely used in sheet metal machine tools. It has solved the problems of high precision, complex shape and large batch of parts in sheet metal processing, and has the characteristics of strong adaptability to workpiece shape modification, high processing precision and increased productivity.

Sheet metal can be defined as: a comprehensive cold processing process for metal sheet metal (usually less than 6mm), including cutting, punching/cutting/compounding, bending, welding, riveting, stitching, forming (such as automobile body), etc. Its remarkable feature is that the thickness of the same part is the same. Generally speaking, the basic equipment of sheet metal includes cutting machine, nc punch/laser, plasma, water jet cutting machine, flame cutting machine, bending machine, and various auxiliary equipment, such as: uncoiling machine, leveling machine, deburring machine, spot welding machine, biting machine, etc. Sheet metal and plastic sometimes, this word is derived from the English platemetal, general is a few sheet metal by manually or stamping mould make its produce plastic deformation, forming the desired shape and size, and can be further by welding or a small amount of machining to form more complex parts, such as chimney is commonly used in family, tin furnace, and motor shell are sheet metal parts.

Generally, the three most important steps of sheet metal are cutting, punching/cutting and bending.

Through the use of numerical control equipment in recent years, the processing capacity of non-standard sheet metal parts can be enhanced. At present, a complete sheet metal processing production line can be formed for such equipment as the main numerical control water jet cutting machine, numerical control cutting machine, numerical control bending machine, numerical control turret punch, spot welding machine and plasma cutting machine. At present, there are many CNC systems for cutting and bending in China, such as Dutch DELEM system, which has a mature and stable application.

Cutting blanking is the first process in sheet metal processing, and the accuracy of blanking directly affects the processing quality of subsequent processes. CNC shearing machine is composed of nc device, servo system, measuring device and machine tool. The servo system consists of three servo motors and servo drive devices. Two servo motors are positioned in front of the machine tool. Usually one main motor works separately. If the hypotenuse is processed, the auxiliary motor works. The CNC system gives two different instructions to form the hypotenuse. After positioning there is a servo motor. The application of nc shearing machine enables the mass repeated blanking to save the marking and alignment process, improve the labor efficiency, and ensure the size of the blanking and the tolerance of the blanking diagonal.

The nc water jet cutting machine completes the processing of complex shape and open hole sheet metal parts. The operator writes the program into the program memory directly through the operation panel of the machine tool. With the increasing maturity of microelectronics and computer technology, the development of China's numerical control technology has been promoted. With the development of CAD/CAM machine technology, the operator can input graphics into the computer's generating program through computer related software and copy them to disk to enter the numerical control system through the disk drive. It can also be input serially by computer and nc system. The application of numerical control water jet cutting machine makes the original complex shape and structure processing simple. The processing of the porous parts is positioned once for cutting and forming, and the cutting precision is high up to + 0.1mm.