The development situation of foreign high-speed precision press
⑴High-speed press has a history of more than 100 years since its birth. American Henry Rattle Company manufactured the world’s first four-column bottom drive high-speed press in 1910. The crankshaft is installed under the worktable and the slide is driven by four guide posts. The stamping speed is generally 200-300 times/min.
(2) Japan’s Nishimura, Shinsumi, and Aida also successfully developed bottom-drive high-speed presses in 1947, 1949 and 1950, respectively. The weight of the reciprocating part of this type of model is heavy, and the problem caused by the inertial force becomes more and more serious when the number of strokes of the slider is high (generally no more than 400 times/min).
⑶ In the 1950s, several forging machine tool manufacturers in the Federal Republic of Germany, the United States, and Switzerland developed early upper-drive high-speed presses to adapt to the production of large quantities of silicon steel sheets and thin plate parts. The coils were automatically fed, and the application was simple. The progressive die is stamped in order, and the stroke number is increased by reducing the stroke of the slider. In 1953, the German Schuler Company produced the first 1250kN closed double-point top drive high-speed press, with a stroke of 20mm and a speed of 150 times/min.
⑷ From the 1960s to the 1970s, the BSTA series of column-oriented upper-drive open high-speed press developed by Swiss Brudel Company had a maximum speed of 400 strokes per minute with a stroke of 30 mm, which increased to 600 strokes in the late 1960s and 70s /Min and 800 times/min, the BSTA41 400kN high-speed press developed in the early 1970s reached an ultra-high speed of 1200 times/min. Subsequently, the press manufacturers launched a competition for the number of strokes of the high-speed press.
⑸ In 1974, the American Munster Company launched the “Hummingbird” series HB2-60 type 550kN closed double-point super high-speed press with a speed of 1600 times per minute. The HB2-30 type 270kN closed double-point super high-speed press developed in 1975 , The speed is further increased to 2000 times per minute. Subsequently, Japan and Germany also developed their own ultra-high-speed presses one after another, entering the era of ultra-high-speed presses.
⑹ After the 1980s, the rapid development of the semiconductor and electronics industries created a large amount of demand for large-scale integrated circuits and electrical components, micromotors, chips and other products, which strongly promoted the development of high-speed presses in the direction of ultra-precision. Japan’s Kurimoto Iron Works introduced a 600kN high-speed press manufactured by Swiss ESSA technology, with a maximum speed of 1500 times per minute, used for processing integrated circuit lead frames, precision connectors and other precision parts (the size error is required to be controlled within 10-20μm); The small high-speed press developed by Nori Manufacturing Co., Ltd. has reached 3000 strokes per minute, and has reached the special precision requirements in the JIS standard under full load conditions, marking the development of high-speed presses to ultra-high-speed and ultra-precision stages. Today, Nidec Jingli’s MACH-100 high-speed press has reached 4000 times per minute with a stroke of 100kN and 8mm.
⑺ At the end of the 20th century, the rapid development of the global home appliance and automobile industries forced high-speed precision presses to further improve stamping accuracy and efficiency. Aida Company of Japan has introduced the MSP series press with bilateral drive, which adopts single-row four-point structure and bilateral drive with higher precision. Japan’s Yamada Dobi EPS-220 model has a single-row four-point structure. When the nominal force is 2200kN and the slider stroke is 30mm, the maximum speed is 420 times/min, and the table size reaches 2700mm×1000mm. In addition, the Japanese company ISIS developed a single-row three-point high-speed press PLENOX80-16 in 2004, with a maximum speed of 500 times per minute and a working table of 1600mm×800mm.