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ＢＪ２０２１汽车用软轴玻璃升降器技术标准高，制造工艺复杂。在升降器导管选材时，用无缝管材铣削开口，成本高、效率低；改用带钢直接卷制，工艺简单、效率高，但易出现质量问题。技术人员边调研、边试验、边设计，最后验证了卷管机工艺方案的可行性。在研制弯管机的过程中，先从手动弯管上积累经验，经过无数次修改验证，逐渐演变出自动弯管机雏形，最终设计出一次弯制成形的全自动弯管机。
BJ2021 soft shaft glass automotive technology standards, manufacturing complex process. In the riser catheter material selection, the use of seamless pipe milling openings, high cost, low efficiency; switch to direct rolling steel strip, the process is simple, high efficiency, but prone to quality problems. Technical staff while research, while testing, while the design, the final verification of the feasibility of the coiling process program. In the process of developing pipe benders, the experience of manual pipe bending was first accumulated, and after numerous times of revision and verification, an automatic pipe bending machine prototype was gradually evolved to finally design a fully automatic bending pipe bending machine.