SU621556A2 - Method of strengthening surface of metal components - Google Patents

Description

4 (see Fig. 2). The subsequent impulse should follow when the part makes one revolution and some other part of it, rather small. So, the next recess 5 (see Fig. 2) is separated from the previous recess 4 at a distance of Dc and D /, etc. A certain arrangement of the recesses creates a continuous helical lubricating groove on the surface. FIG. 2 shows the formation of a single-thread helical lubrication groove. In principle, the formation of a lubricant groove with Z strokes is possible. In both cases, the implementation of the method should be maintained the following relationship: W ±.

Then the pitch of the screw lubrication groove 20 is equal to

T S (,, (2)

t ± 0

where 5 is the tool feed.

It should be noted that with a positive value of D we have the right screw lubrication groove, with a negative - left. For example, with d 60 mm, Kd 75 m / min, S 0.2 mm / rev, and D / 0.153 s, we have from expression (2)

2 (- + of the lubrication groove is 13.53 mm. The time for one product revolution is 0.15 s, the difference in the pulse alternation interval and the time for one revolution is 0.003 s.

It is necessary that the impulse of force be applied at the same moment of the cycle of the additional movement, and. it is repeated after an integer number of cycles of this movement. This can be expressed by the ratio

Claims (1)

Invention Formula The method of hardening the surface of metal parts according to ed. St. 366062, characterized in that, in order to improve the quality of processing, a deforming force is applied at the same time. An additional reciprocating motion is applied, and the time interval between the same displacement values is selected from the ratio () -11. th D / Cd.2 where D is the time of alternation of the pulse of the deforming force; m is an integer; Vp is the speed of movement of the part; d is the diameter of the part; Z is the number of visits; D - small value, less than one, the frequency of application of the force is a multiple of the frequency of the cycles of the additional reciprocating motion. where “dvh - the number of double strokes of the tool per minute. The frequency of application of the force (pulsation) is a multiple of the frequency of the cycles of the additional movement. The method allows the surface to be strengthened while at the same time obtaining lubricating grooves on them, which are calculated taking into account the optimality of the microrelief. The method allows to obtain vibro-rolled surfaces and with the simultaneous application of additional lubrication grooves on them, i.e., to obtain a combined microrelief characterized by minimal wear. All this undoubtedly contributes to the widespread introduction of the proposed method.