SU855258A1 - Steep-feeding hydraulic mechanism - Google Patents

Description

(54) HYDRAULIC STEP FEED MECHANISM

I

The invention relates to mechanical engineering, in particular to devices for precision step-by-step feeding of equipment for cutting brittle non-metallic materials, for example, machine tools equipped with diamond wheels with an inner cutting edge.

Known hydraulic mechanism step feed, containing a stationary element, a hydraulic cylinder, in the housing of which. A piston with rods interacting with partitions and a hydraulic clamp fixing the piston relative to the fixed element are placed with transverse partitions, and an adjusting screw J is installed on the list 5 of the partitions.

The disadvantage of this mechanism is that during non-working movement of the piston of the hycrocylinar neither the piston nor its body is fixed on the frame, which can lead to a shift of the body under the action of the reactive force resulting from overcoming the friction of the piston in the orifice of the hydraulic mechanism. clamping or under the action of vibrations of the working machine, which will entail a change in the magnitude of the step movement, i.e. reduced accuracy of movement.

The purpose of the invention is to improve the accuracy of these step movements.

This goal is achieved by the fact that the hygrocylinder case is provided with an additional hydraulic clamp for interfacing with the fixed element, and the hydraulic clamp for fixing the piston is mounted on the post.

Claims (1)

FIG. 1 shows a diagram of a hydraulic step-feed mechanism with a stationary element made in the form of a cylindrical rod, on the outer surface of which the movements and fixations of the body and piston of the hydraulic cylinder are performed; in fig. 2 - the same, made in the form of a pipe, on the inner cylindrical surface of which, 38, the casing and piston of the hydraulic cylinder are moved and fixed. The hydraulic tactile mechanism contains a hydraulic cylinder 1, consisting of a housing 2 and a piston 3 located in it, having left 4 and right 5 rods, which together with body 2 form the left 6 and right 7 cavities of the hydraulic cylinder 1 with channels 8 and 9. Case 2 and the porsche 3 is equipped with hydraulic clamps 1O and 11, made in the form of cylindrical thin-walled chambers with channels 12 and 13 for supplying the working medium under pressure. The housing 2 has transverse partitions 14 and 15, between which the partition 16 of the piston 3 is located. In the partition 15 of the housing 2 there is an adjusting screw 17, which allows adjusting the amount of the step movement of the piston 3. In FIG. 1, the hydraulic clamps 1O and 11 cover, with a minimum clearance, the fixed element 18, which is fixedly mounted and serves to guide the movement of the housing 2 and the piston 3. In the hydraulic mechanism of the step feed in FIG. 2, the stationary element 18 is made in the form of a pipe, which encloses the hydraulic clips 1 O and 11 with a minimum gap. The hydraulic mechanism of the step feed works as follows. In the initial position, the channels 8, 9, 12 and 13 are connected to the drain line of the hydro system (the drain and pressure lines of the hydraulic system are not shown). When the channel 12 and the hydraulic clamping chamber Yus are connected by the pressure line of the hydraulic system, the clamp Yu is deformed and fixes the body 2 on the stationary element 18. Upon subsequent connection to the pressure line of the hydraulic system of channel 8 and the cavity 6 of the hydraulic cylinder 1, the piston 3 moves to the right up to the right side of the partition 16 in the adjusting screw 17 of the partition 15, the displacement of the working medium from the cavity 7 of the hydraulic cylinder .1. passes through the channel 9 to the drain line of the hydraulic system. If you then connect channel 13 and the hydraulic clamp chamber 11 with the pressure line of the hydraulic system and thus fix the piston 3 on the stationary element 18, and then connect channel 12 and the hydraulic clamp chamber 8 10 with the hygroscheme drain line, unlatching the housing 2, and After that, connect channel 9 and the strip 7 of the hydraulic cylinder 1 with the pressure line of the hydraulic system, then the housing 2 moves to the right of the stop of the anvil with the partition 14 into the plane of the partition 16 of the piston 3. Thus, the step movement of the piston 3 and the housing 2 takes place and the working body of the machine, which must be connected to the piston 3 or the housing 1. To perform the next step movement of the housing and the piston, it is necessary to fix the piston 3 on the fixed element 18, to connect the channel 12 and the hydraulic clamp chamber 10 with the hydraulic pressure line, fixing body 2 on stationary element 18 and only after that unlock piston 2 and connect line 8 and cavity 6 to hydraulic line for moving piston. In order to reverse the movement of the mechanism, it is necessary to initially fix on the fixed element 18 not the body 2, but the piston 3, following the above sequence of fixation and movements of the body 2 and the piston 3. The invention Hydraulic stepping feed mechanism containing the fixed element, a hydraulic cylinder, in the body of which has transverse baffles, a piston with rods interacting with baffles, and a hydraulic clamp fixing the piston relative to the fixed element, and on one of the The town has an adjusting screw, characterized in that, in order to increase the accuracy of the step movements, the hydraulic cylinder body is provided with an additional hydraulic clamp for interacting with the stationary element, and the hydraulic clamp fixing the piston is mounted on the latter. Sources of information taken into account during the examination 1. Synthetic diamonds. Scientifically-protivosteggnny collection. Issue 5 (29). Kiev, Naukova Dumka, 1973, p. 74, fig. 1. g 10 in 3 7 11 5 / in y V yiyyv UU W 10 1 3 2 S // / // / TVVV / J / 1 // L77U // // // // iil, f / / y Agvx /// xy /, 16 16 15 17 rS 17. I /