论文部分内容阅读
我厂加工的无刃切断刀呈薄片状,材料是T12A,具体规格如图1。要求硬度HRC55～58,平面变形度≤0.10mm。原工艺路线是:下料—锻造—等温退火—机械加工—热处理—精加工。原热处理工艺见图2。采用盐浴炉加热,装炉量是两卡具,每卡具20件。装卡情况见图3。工件淬火后,经清洗,上回火夹具(见图4),先稍加夹紧,放入箱式炉加热150～160℃×1h,取出再夹紧,然后放入硝盐炉中回火270～280℃×1h。原工艺处理结果:硬度HRC57～58,平面变形度超差件数量达1/3,变形量0.15～0.20mm。用反击法校直挽救,既费工、劳动强度又大、质量也不好,还会出现裂纹报废。
I plant processing bladeless cutting blade was thin, the material is T12A, the specific specifications shown in Figure 1. Required hardness HRC55 ~ 58, plane deformation ≤ 0.10mm. The original route is: cutting - forging - isothermal annealing - machining - heat treatment - finishing. The original heat treatment process shown in Figure 2. Salt bath furnace heating, loading capacity is two cards, each card with 20 pieces. Card loading situation shown in Figure 3. After the workpiece is quenched, the workpiece is hardened and then returned to the fire fixture (see Figure 4). First, it is slightly clamped and heated in a box-type furnace at 150-160 ° C for 1h. The workpiece is removed and clamped again, then tempered in a salt- 270 ~ 280 ℃ × 1h. The results of the original process: hardness HRC57 ~ 58, the amount of plane deformation over the number of 1/3, the deformation of 0.15 ~ 0.20mm. Alignment with the council straight save, both labor-intensive, labor-intensive, quality is not good, but also crack scrap.