I. Introduction
With the advancement of science and technology and the rapid development of industry, molds have become the main process equipment used in industrial production today. As an important process equipment, molds play an important role in the industrial sectors such as consumer goods, electrical appliances, automobiles, and aircraft manufacturing. 75% of roughing of industrial product parts, 50% of finishing and 90% of plastic parts will be completed by mold. At present, China's mold market demand has reached 50 billion yuan, and China's mold manufacturing market has great potential. Mold is a special tool used to shape (form) the shape of parts required for various metal or non-metal materials. This special tool is collectively called a mold. Mold is the most basic equipment in industrial production and an indispensable tool for achieving less cutting and no cutting. Molds have been widely used in various fields of industrial production, such as automobiles, motorcycles, household appliances, instruments, meters, electronics, etc., 60% to 80% of them require molds for manufacturing; high-efficiency mass production of plastics Standard parts such as parts, screws, nuts and washers also require molds to be produced; engineering plastics, powder metallurgy, rubber, alloy die-casting, glass forming, etc., need to be molded with a mold.
Because of the wide range of mold applications, the related mold manufacturing technology has also developed greatly. At present, the use of high-speed cutting to produce molds has become a major trend in mold manufacturing. In some foreign mold manufacturers, high-speed machine tools have replaced EDM machines in large areas, and high-speed cutting production molds have gradually become a major trend in mold manufacturing.
Second, high-speed machining technology overview
High Speed ​​Cutting (HSC) is an advanced manufacturing technology that has risen rapidly in the last decade. High-speed cutting technology has high cutting efficiency, high processing quality, direct processing of hardened steel parts and good economics, which has significantly improved the production efficiency and manufacturing quality of the aviation, mold, automotive, light industry and information industries. Cause the processing technology and equipment to be updated accordingly. Therefore, like CNC technology, high-speed cutting and high-speed machining have become a far-reaching technological revolution in the 21st century machinery manufacturing industry. At present, high-speed machining centers and other high-speed CNC machine tools that meet the requirements of HSC have been popularized in developed countries, and China is also accelerating development recently.
1. Key technologies for high-speed cutting machine tools
In order to adapt to rough finishing, light and heavy cutting and fast movement, while ensuring high precision (positioning accuracy ± 0.005mm), a machine with good performance is a key factor in achieving high-speed cutting. The key technologies are as follows:
(1) High speed spindle
The high-speed spindle is the core component of the high-speed cutting machine. With the continuous improvement of the spindle speed, the traditional gear-belt transmission system can not meet the requirements due to its own vibration and noise. It is replaced by a novel one. The functional part--electric spindle, which combines the spindle motor and the machine tool spindle into one, realizes the integration of the spindle motor and the machine tool spindle. The electric spindle adopts an electronic sensor to control the temperature. It has a water-cooled or oil-cooled circulation system to keep the spindle at a constant temperature during high-speed rotation. Generally, it can control a set temperature within the range of 20 °C~25 °C with an accuracy of ±0.7 °C. At the same time, new technologies such as oil mist lubrication and hybrid ceramic bearings are used to make the spindle maintenance-free, long-life and high-precision.
(2) High speed servo system
In order to achieve high-speed machining, the machine tool not only has a high-speed spindle, but also a high-speed servo system, which is not only to improve production efficiency, but also to maintain the normal operation of the tool in high-speed cutting, otherwise it will cause sharp wear and warming of the tool. , destroy the surface quality of the workpiece processing.
1 linear motor servo system
The linear motor is a kind of thrust device that directly converts electric energy into linear mechanical motion. It shortens the length of the machine feed transmission chain to zero, and its dynamic response performance is agile, the transmission rigidity is high, the precision is high, the acceleration and deceleration is large, and the stroke is not Limited, low noise, high cost, the only choice for servo systems in the case of acceleration greater than 1g.
Next page
we produce CaSi Cored Wire 5000mt/year
specification:A ca:30% si:60%min Al:1.5%max C:1%max S:0.05%max P:0.05%max
B ca:28% si:58%min Al:1.5%max C:1%max S:0.05%max P:0.05%max
DIa:13mm
Calcium Silicon Cored Wire, Silicon Calcium Barium Cored Wire,Calcium Silicon Alloy Cored Wire,Calcium Metal Cored Wire,CaSi Cored Wire,Ca Cored Wire
Shizuishan Ketong Metallurgy Industry And Trade Co., Ltd. , http://www.ketongmetallurgy.com