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对某型闭式双点高速压力机进行下死点精度测试,测试数据表明:在不同平衡气压下,随着高速压力机速度逐渐提高,下死点位置将发生约0.10 mm的突变;静平衡气压不同,发生突变的速度也不同,因此该型压力机不适合使用静平衡装置;随着润滑油量的提高,在2 h内的下死点数据变动幅值呈显著压缩趋势;当测试机床从冷态(机床与环境温度一致)开始测量时,下死点先上移,之后迅速下移大约75 min,下死点再缓慢上移,直至测试结束(约300 min),这表明测试环境的温度对下死点精度影响很大。
The test results of the bottom dead center of a type of closed two-point high-speed press indicate that at a constant pressure of about 0.10 mm, a sudden change in the position of bottom dead center occurs as the speed of the high-speed press gradually increases. The pressure is different, the mutation speed is also different, so the type of press is not suitable for the use of static balance device; with the increase of the amount of oil, within 2 h bottom dead point data showed a significant trend of changes in amplitude; when testing machine tools When measuring from a cold state (the machine is at the same temperature as the ambient temperature), the bottom dead center moves up first and then quickly moves down for about 75 min. The bottom dead center moves slowly upward until the test ends (about 300 min), indicating that the test environment The temperature has a great effect on the accuracy of bottom dead center.