[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fI9SQp4cKPWkaN25-DgRi6G3WkQx3EJTLKNSGsFciS-Y":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":15,"related":16,"source":23,"type":24},[],"2024-01-02 12:18:47",125469358,[],{"count":9,"courseId":10,"courseImg":11,"courseName":12,"workId":13,"workName":14},44,"35675fcaf5ee1bad426789bbee4ab242","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc491bec2e253ec14fa70be83ad1f3e34.jpg","工程实训","work_28619084","第11章 焊工实训","11.9、熔焊是在焊接的过程中,利用一定的 将焊件 加热至 ,在常压下 成为一体的焊接方法",[17,25,30,35,40,43,48,53,58,63],{"answer":18,"createTime":19,"id":20,"options":21,"question":22,"source":23,"type":24},[],"2024-01-02 12:18:46",125469351,[],"11.1、进入车间前要穿好工作服、工作鞋,戴好 、 、 等防护用品","v1",2,{"answer":26,"createTime":19,"id":27,"options":28,"question":29,"source":23,"type":24},[],125469352,[],"11.4、电焊机或线路 时,应 工作",{"answer":31,"createTime":5,"id":32,"options":33,"question":34,"source":23,"type":24},[],125469353,[],"11.26、在使用 焊接 的钢板时,可利用阳极区 的特性,选择正接法,加快工件的熔化、增加熔深,保证焊缝根部熔透",{"answer":36,"createTime":5,"id":37,"options":38,"question":39,"source":23,"type":24},[],125469355,[],"11.25、正接法就是 接直流弧焊机的正极, 接负极;反接法则反之",{"answer":41,"createTime":5,"id":6,"options":42,"question":15,"source":23,"type":24},[],[],{"answer":44,"createTime":5,"id":45,"options":46,"question":47,"source":23,"type":24},[],125469367,[],"11.39、焊接坡口形式有 坡口、 坡口、 坡口、 形坡口、 形坡口等多种,坡口形式应根据工件的 、焊接方法、 及焊接工艺等进行选择,同时,还应考虑保证焊缝能焊透,坡口 、节省焊条、焊后变形较小及提高生产效率等问题",{"answer":49,"createTime":5,"id":50,"options":51,"question":52,"source":23,"type":24},[],125469368,[],"11.7、焊接是指通过适当的 过程如 、 或二者并用等方法,使 或两个以上 产生原子(分子)间的 而 的连接方法,是金属加工的一种重要工艺",{"answer":54,"createTime":5,"id":55,"options":56,"question":57,"source":23,"type":24},[],125469371,[],"11.35、平焊 ,焊缝成形 ,容易获得 并具有 ,是 的位置;其他三种又称 ,焊工操作较平焊困难,受熔池液态金属重力的影响,需要对焊接规范控制并采取一定的操作方法才能保证 ,其中焊接条件 最差, 次之",{"answer":59,"createTime":5,"id":60,"options":61,"question":62,"source":23,"type":24},[],125469375,[],"11.14、焊接与其他连接方法(如螺纹连接、铆接、键连接等)相比,不用 ,材料截面能得到充分的利用,也不需要 ,因此可以节省大量材料,大大 结构的 ;不需要机械加工设备,以及相关的工序,简化了 的工作量,提高了工作效率",{"answer":64,"createTime":5,"id":65,"options":66,"question":67,"source":23,"type":24},[],125469377,[],"11.36、焊接接头是指用焊接的方法连接的接头,它由 、 、热影响区及其邻近的母材组成"]