CNC machine tools

CNC machine tools-How to operate CNC machine tools?

CNC machine tool is a micro-electronic technology, computer technology, automatic control technology and servo drive technology, precision machinery technologies. CNC machine tools is highly typical of mechatronics products. CNC machine tools is an important part of the mechanical and electrical integration, modern machine technology, an important indicator of the level. CNC machine tool technology reflects the current progress in the mainstream of the world, is a measure of the mechanical manufacturing process an important indicator of the level in the flexible manufacturing and computer integrated manufacturing and other advanced manufacturing technology plays an important basis for the central role. Therefore, how to better use of CNC machine tools is a very important issue. As the CNC machine tools is an expensive precision equipment, and therefore its maintenance is to be ignored.

The working principle of CNC machine tools is required to process a variety of operations (such as spindle speed, workpiece and clamp release, feed and retract, driving and parking, automatically shutting down the cooling fluid) and steps as well as the shape of the workpiece size with the digital code that, by controlling the media (such as punched paper tape or disk, etc.) to digital information into digital devices, digital devices to the input of information processing and computing, to issue various control signals to control the servo system or machine other drive components, so that the machine automatically processing the required parts. So, NC is the key process parameters and process data access, that is numerical control programming. NC generally include the following elements:
(1) analysis of the drawings, to determine the need for CNC machining of parts;
(2) the use of graphics software (such as CAXA Manufacturing Engineers) in need of some modeling CNC machining;
(3) According to the processing conditions, select the appropriate processing parameters, trajectory generation processing (including roughing, semi-finishing, finishing path);
(4) The trajectory of the simulation test;
(5) to generate G-code;
(6) to the machining.
(2) the characteristics of CNC machine tools
(1) highly flexible
In the CNC machine tool parts, depending on processing, it is different from ordinary machine tools, not manufacturing, replacing many tools, fixtures, do not always adjust the machine. Therefore, the CNC machine tools for frequent replacement of parts of the occasion. That is suitable for single, small-batch production and new product development, shortening the production preparation period, save a lot of process equipment.
(2) high precision
CNC machining accuracy, and can be reached 0.005 ~ 0.1mm, CNC machine tools are controlled by digital signal form, a numerical control device for each output pulse signal, the machine moving parts to move a pulse equivalent (typically 0.001mm), and machine tool The backlash to the drive chain and screw pitch error by the average compensation of CNC devices, therefore, relatively high positioning accuracy of CNC machine tools.
(3) The processing quality is stable, reliable
Processing the same number of parts, in the same machine, in the same processing conditions, using the same tools and processing procedures, the same tool the cutting path, parts of the consistency, quality and stability.
(4) high productivity
CNC machine tools can be effective in reducing the machining time and auxiliary time, numerical control machine tool spindle speed and feed rate range, allowing a large amount of cutting machine tools for powerful cutting, CNC machine tools is now entering the era of high-speed machining, CNC machine moving parts The fast-moving and positioning and high-speed machining, semi-finished products to reduce the turnaround time between processes and improve productivity.
(5) improve working conditions
Adjusted before CNC machining is completed, enter the program and start the machine will automatically continuous processing, until the process ends. Operator main program entry, editing, loading and unloading parts, tool preparation, processing status of the observations, parts inspection, etc., greatly reducing the labor intensity, the machine operator's work tends to intellectual work. In addition, the machine is generally a closed process, that is clean and safe.(6) is conducive to the modernization of production management
CNC machining, processing time can be estimated accurately in advance, the use of tools, fixtures can be standardized and modern management. CNC machine tools using standard code for the digital signal and control information, easy to implement standardization of processing information, has been with the computer-aided design and manufacturing (CAD / CAM) organically combined, is the foundation of modern integrated manufacturing technology.

3 How to use the CNC machine?

Before using the CNC machine tools, machine tools should be used carefully read the instructions and other relevant information in order to operate correctly using the machine, and note the following:

(1) machine operators, maintenance personnel must master the professional knowledge of the corresponding machine or technically trained professional staff, and must operate according to the provisions of safety procedures and safe operation of the machine;
(2) non-professionals may not open the electric doors, electric door opening must be confirmed before the machine has been turned off the main power switch. Only qualified service personnel should be allowed to open electric doors, the power maintenance;

(3) except for some users and can be changed for the parameters, the other system parameters, spindle, servo parameters, users can not modify without permission, otherwise the operator will bring equipment, artifacts, personal injury, etc.;

(4) modify the parameters, for the first time processing, the machine tool and the workpiece is not installed with the machine locked case, methods such as single block test run, verify that the machine to normal after the use of machine tools;

(5) the machine's PLC program is by machine tool manufacturers need to design, and require modification. Incorrect changes to operating the machine may cause damage to the machine, and even harm the operator;

(6) suggested that up to 24 hours continuous operation of the machine, if the continuous running time is too long will affect the electrical system and part of the life of mechanical components, which will affect the accuracy of machine tools;

(7) machine all connectors, joints, etc., not allowed to live drawing, insert operations that would otherwise lead to serious consequences.