| 摘要 |
<p>The invention relates to a process for making a bent beater pick which is mounted on special equipments for the railway packing operations. According to the invention, the process starts by cutting a portion with a length of 460 ± 0.8 mm from a round rolled steel semi-finished product, afterwards, on the both frontal sides there are marked the centers Oand Oat a distance (b) between their axes, the centers Oand Oat a distance (c) between their axes and a center Owith the axis (e) at a distance (c) from the axis O, followed by the operation of boring by making some centering holes (f and g) at a distance (c) between them, a turning to DxA performed by fixing the piece with the centering hole (e), with the center in O, in the point of a special piece which is fastened in the tailstock spindle sleeve, there is made the eccentric cylindrical turning DxC by fixing the diameter Din the lathe chuck and with the other centering hole (e) in the tailstock spindle sleeve, there is made a taper turning with a conicity of 1:K, there resulting the surface (E), the piece is bored atΦ= 18 x 45 mm and threaded at Mx1.5, followed by obtaining the surfaces (F, G, H, I and J) by taper turning, with the diameters (Dand D), a channel (h) is milled along the generatrix (E), the piece is rotated by 180° and another channel is diametrically opposed machined, the piece is ground according to the axis OO, by the grinder, by positioning the beater pick with the shaft into the chuck and with the centering mouth in Ointo the tailstock spindle sleeve, there is machined a radius Ron the head of the cone having the piece fixed in the same manner, the piece is moved onto a parallel lathe where the centering drill is fixed, with the center in O, into the taper point of a piece fixed in the lathe bore-hole, and with the centering hole (f), with the center in O, fixed in the point of the tailstock spindle sleeve displaced by a distance (b) in relation to the axis OOwhere, by taper turning, there is obtained the surface (k), followed by machining the recess (L) for the picker and milling of the surface (M).</p> |
