弯管机的作用和操作流程是什么？
1. Static state: The static position of the pipe bender is that the upper bending beam is at the top dead center. In order to prevent uncontrolled downward movement, the system uses a leak-free back pressure valve to seal the rod cavity of the hydraulic cylinder;
2. Downward movement: The downward quick closing movement of ordinary pipe benders mostly adopts the form of free landing, that is, the movement is generated by the self-weight of the pipe bender beam and accessories. In this process, the rodless cavity of the hydraulic cylinder is replenished with oil through a liquid filling valve, and the rod cavity will generate back pressure at this time. Fast forward speed up to 250mm/s) is controlled by proportional directional valve in open or closed loop. The fast-forward movement starts from the top dead center, and after a short braking stage, it ends at a distance of 6mm from the bent plate. Different pipe benders require different fast-forward end positions;
3.冲压/弯曲:冲压/弯曲阶段从无杆腔的压力建立开始。冲压速度一方面受油泵供油的限制，另一方面可以通过比例阀的方向阀来调节。同时，换向阀还控制弯曲梁的同步运行和下止点的定位。冲击力的限制是通过比例安全阀限制泵的压力来完成的。相应的速度、同步、定位、压力给定值都来自数控器；
4. Decompression: Decompression of the rodless cavity begins either when it reaches the bottom dead center or after a short holding time, so that the deformed material flows for a certain time, thus further improving the dimensional accuracy of the part. Pressure maintaining and decompression are completed by proportional directional valve according to the instruction of numerical controller. According to the required operation cycle time, the decompression time should be as short as possible; However, in order to avoid unloading shock in the whole system, it is required to be long enough. In short, the decompression curve is not allowed to be too steep and requires stability. The optimization of the whole process is realized by proportional directional valve;
5. Return stroke: The flow rate of the pump and the bearing area of the rod cavity of the hydraulic cylinder determine the large return stroke speed, which is close to the fast speed in most cases. The return journey begins with decompression of the rod cavity and ends at the top dead center. The return journey also requires synchronous operation.
Precautions for pipe bender:
1. Refer to the instruction manual of electric oil pump;
2.当有负载时，切勿拆除快速连接器；
3.本机以油为介质，需要对油和本机进行清洁保养，以免堵塞或漏油，影响使用效果。
使用弯管机切割板材有以下优点:
1.加工精度高，可以减少废料和边角料以及再加工的切削量，既提高了再加工效率，又有利于降低消耗；
2、可以选择加工方式,较之气焊切割,其加工后钢材的晶相组织变化较少,可保证钢材的原状态,有利于进行高质量加工；
3、由于集中加工可保证批量及生产的连续性,可以研究此项技术并采用设备,大幅度提高和降低第四,使用户简化生产环节,提高生产水平。
弯管机生产效率的提高方式：
1、弯管机应有专人负责使用和保管。操作者必须熟悉机床的结构、性能；
2、严禁超负荷使用弯管机。不得剪切淬火钢料和硬质钢、高速钢、合金钢、铸件及非金属材料；
3、刀片刃口应保持锋利,刃口钝或损坏,应及时磨修或调换；
4、多人操作时应有专人指挥,配合要协调；
5、弯管机上禁止同时剪切两种不同规格的材料,不准重叠剪切；
6、剪板入料时禁止把手促进压板下面操作。剪短料时应另用铁板压住,剪料时手指离开刀口至少200毫米；
7、用撬捧对线后,应立即将撬捧退出方可剪切,如铁板有走动,应用木枕塞牢,以免压脚下来后撬捧弹出伤人；
8、剪好的工件必须放置平稳,不要堆放过高,不准堆放在过道上。边角余料及废料要及时清理,保持场地整洁。