目前,我国用来制造五铧犁L—714犁铧的型钢有两种规格:一种是仿苏151J型(图1—3),一种是J—133型(图1—1)。这两种型钢的主要区别:151J型料宽,被切除的废料多(图1—3阴影区F_2和F_3),但不需另外增加工序即可冲剪得犁铧之毛坯(图2);J—133型钢料窄,被切除的废料少(图1—1阴影区F_1),但必须增加一道“弯曲”工序,才能得到犁铧之毛坯(图1—2)。它比151J型钢制造一片犁铧节省0.5～1.8公斤钢材。国内绝大部分农机厂都 At present, there are two kinds of steel used to make the L-714 ploughshare of the five-plow plow: one is the imitation Su-151J (Figure 1-3) and the other is the J-133 (Figure 1-1). The main difference between the two types of steel: 151J wide material, cut off the waste and more (Figure 1-3 shaded areas F_2 and F_3), but without additional processes can be redown Plowshare of the blank (Figure 2); J Type -133 steel is narrow with less scrap to be cut (Figure 1-1, shaded area F_1), but a “curving” process must be added to get the plow -shaped stock (Figure 1-2). It is a piece of plowshare than the 151J-type steel to save 0.5 to 1.8 kg of steel. Most domestic agricultural machinery plant are