图片名称

简体中文 | English

图片名称

Technical application of CNC machine tools

2021-09-15

CNC machine tool is an automatic machine tool equipped with a program control system, which can make the machine tool move and process parts according to the programmed program. It integrates the latest technologies such as machinery, automation, computer, measurement, microelectronics, etc., and uses a variety of sensors. The sensors used in CNC machine tools mainly include photoelectric encoders, linear gratings, proximity switches, temperature sensors, Hall sensors, current sensors Sensors, voltage sensors, pressure sensors, liquid level sensors, resolvers, inductive synchronizers, speed sensors, etc., are mainly used to detect position, linear displacement and angular displacement, speed, pressure, temperature, etc.

1. The requirements of CNC machine tools for sensors

1) High reliability and strong anti-interference;

2) Meet the requirements of accuracy and speed;

3) Easy to use and maintain, suitable for machine tool operating environment;

4) Low cost.

Different types of CNC machine tools have different requirements for sensors. Generally speaking, large-scale machine tools require high speed response, while medium-sized and high-precision CNC machine tools require accuracy.

2. Application of Induction Synchronizer

The inductive synchronizer is made by using the principle that the mutual inductance of two planar windings varies with the position. Its function is to convert the angular or linear displacement into the phase or amplitude of the induced electromotive force, which can be used to measure the linear or angular displacement. According to its structure, it can be divided into two types: linear type and rotary type. The linear induction synchronizer is composed of two parts: a fixed length and a sliding ruler. The fixed length is installed on the machine bed, and the sliding ruler is installed on the moving parts and moves with the worktable; the stator of the rotary induction synchronizer is a fixed disc, and the rotor for the rotating disc. The induction synchronizer has the advantages of high precision and resolution, strong anti-interference ability, long service life, simple maintenance, long-distance displacement measurement, good manufacturability, and low cost. Rotary induction synchronizers are widely used in turntables of machine tools and instruments and various rotary servo control systems.

Related news

Congratulations on the launch of the website of Nantong Huadu Heavy Machine Tool Co., Ltd.

Nantong Huadu Heavy Machine Tool Co., Ltd. is a key backbone enterprise in the forging machinery industry. The company is located in the economically developed Yangtze River Delta, Jiangsu Hai'an Binhai Industrial Zone. The company specializes in the production of "HuaDuan" brand series of shearing machines, bending machines, bending machines, hydraulic presses, uncoiling, leveling and shearing production lines. Products are widely used in: light industry, aviation, shipbuilding, metallurgy, instrumentation, electrical appliances, stainless steel products, construction and decoration and other industries. Products are exported to Europe, America, Southeast Asia, the Middle East and other countries and regions. The company has domestic shearing, folding, coiling, hydraulic presses, leveling and shearing production lines and many other majors. The product quality and technical level of research, development and manufacturing are at the forefront of the industry; Huaforging Machine Tool is with advanced consciousness, new ideas and innovative spirit. , integrating domestic and foreign advanced technologies, and continuously researching and developing industry products, laying a solid foundation for "Hua Ding" to build a well-known brand in the world forging industry.

2022-01-19

How to reduce the error of workpiece machining by vertical machining center

For any processing equipment, when there are problems with workpiece processing, such as processing route setting, processing program preparation, processing tool selection, machine tool problems, clamping problems and workpiece material, it will affect the processing accuracy and processing efficiency of the workpiece. As a high-precision processing equipment, the commonly used methods of reducing the machining error of the workpiece mainly include the original error reduction method, the error compensation method, the error transfer method, the error grouping method, the error average method and the error synthesis method. 1. Error synthesis method Reducing the error of the machine tool itself is the main method to ensure the machining accuracy of the workpiece. The error synthesis method requires measuring the original errors of each axis of the machine tool. Laser interferometer is the main detection instrument of vertical machining center because of its high measurement accuracy and flexible use. 2. Error compensation method The error compensation method is to artificially create an error to offset the original error inherent in the process system, or to use one original error to offset another original error, so as to achieve the purpose of improving the machining accuracy of the workpiece of the vertical machining center. Usually, by reducing the clearance of the machine tool, improving the rigidity of the machine tool, and using preload to generate a preload force for the relevant fit, the effect of the clearance is reduced. It can also improve the rigidity of the workpiece and the tool and reduce the overhang length of the tool and the workpiece to improve the rigidity of the process system. It is also possible to adopt reasonable clamping methods and processing methods, reduce cutting force and its changes, reasonably select tool materials, increase rake angle and main declination angle, and conduct reasonable heat treatment of workpiece materials to improve the processing performance of materials, etc. a method. 3. Directly reduce the original error method The method of directly reducing the original error refers to trying to directly reduce or reduce the main original error factors that affect the machining accuracy after identifying the main original error factors. For example, after the vertical machining center is used for a long time, the positioning of the transmission system and the backlash caused by natural wear and tear are inaccurate. Fourth, the error average method The error average method is to use the mutual comparison and mutual correction between the closely related surfaces, or use the mutual benchmark for processing, so as to achieve the purpose of reducing the processing error of the vertical machining center. 5. Error transfer method The essence of the error transfer method is the comprehensive error caused by the collective error, force deformation and thermal deformation of the transfer process system. For example, when a vertical machining center performs some hole processing, the coaxiality of the workpiece is not guaranteed by the rotation accuracy of the machine tool spindle, but by the fixture. When the machine tool spindle and the workpiece are connected by floating, the original error of the machine tool spindle will no longer be Affect the machining accuracy, and transfer to the fixture to ensure the machining accuracy. 6. Error grouping method In the machining of vertical machining center, the machining error of this process is caused due to the existence of process blank error. The change of blank error has two main influences on this process: reaction error and positioning error. If the above error is too large, the machining accuracy cannot be guaranteed, and it is unrealistic to improve the blank accuracy or the machining accuracy of the previous process. At this time, the error grouping method can be used, that is, the blank or the previous process size is divided into n groups according to the size of the error, the error of each group of blanks is reduced to the original 1/n, and then the relative position of the tool and the workpiece is adjusted according to each group. Adjust the positioning elements, so that the size dispersion range of the whole batch of workpieces can be greatly reduced. The essence of the error grouping method is to make up for the lack of machining accuracy by means of improving the measurement accuracy, so as to reduce the influence of machining errors.

2022-01-19

What are the contents of daily maintenance and maintenance of CNC machine tools?

With the development of science and technology, the level of automation and intelligence of modern machinery manufacturing industry is getting higher and higher, and CNC machine tools are more and more applied to production and manufacturing, which promotes the development of modern machinery manufacturing industry. The automation and intelligence of CNC machine tools are high, and the maintenance of CNC machine tools also has high technical requirements.

2022-01-19