弦轴质量的好坏,对钢琴的音准有很大的影响。一台钢琴,全部零件组装完毕之后,调音员便进行调音。调音时,经常发现由于弦轴螺纹的螺距太大(达0.35mm)、分布不均、深度不够、深浅不一、螺纹升角小等缺陷,致使调音员很难把音调准。即使一时调准了,不久就会出现松动走音的现象。这是多年来影响钢琴质量的一个老大难问题。遵照毛主席“打破洋框框,走自己工业发展道路”的教导,发扬“独立自主、自力更生”的革命精神,我们克服了设备条件差.技术力量薄弱等困难,用了近一个月的时间,花了几 Piston quality is good or bad, the pitch of the piano has a great impact. A piano, after all the parts are assembled, the tuner will be tuned. Tuning, often found that because of the pitch of the thread axis pitch is too large (up to 0.35mm), uneven distribution, the depth is not enough, the depth of different, thread angle and other small defects, resulting in tuner is difficult to tune the tone. Even temporarily adjusted, and soon there will be loose sound phenomenon. This is a chronic problem affecting the quality of the piano over the years. Following the guidance of Chairman Mao’s “breaking the framework of the foreign trade and taking the road of industrial development” of Chairman Mao and carrying forward the revolutionary spirit of “independence and self-reliance,” we have overcome difficulties such as poor equipment and weak technical forces. It took nearly a month and spent a few