SU856687A1 - Disc shears guide for withdrawing cut edges - Google Patents

Description

(54) WIRING DISK SCISSES FOR DRAINING TRIMMED EDGE

one

The invention relates to auxiliary equipment for rolling mills and can be used to guide the trimmed edge from disc to edge shredding scissors.

Known disc shear wiring for guiding the trimmed edge to the edge-cutting scissors, comprising a tubular tray, a guide mounted on the disc scissors base along the trimming edge, and a puller to separate the cutting edge from the blade, secured to the guide with screws 1.

The main disadvantage of this wiring is that it has the possibility of drilling the trimmed edge due to its front end falling into the gap between the wedge surface of the puller and the cylindrical surface of the upper knife. This gap is necessary to compensate for the radial beating of the circular knives and to eliminate the wear of the puller. Since the edge is limited by the puller only on one side, the possibility of its drilling increases due to the twisting of the cut edge into a helical helix. In addition, the need to manually adjust the puller in the event of a change in the distance between the axes of the knives when switching from cutting a sheet of one thickness to cutting a sheet of another thickness leads to a decrease in productivity due to the idle time of the disc shears.

Also known is the wiring of disc shears to retract the cut edge, which contains a tray placed on the bed of the shears along the edge, in the guides of which the upper and lower shears are installed in the cutting zone of the disc shears.

10 with the possibility of translational movement by means of adjusting their position relative to the upper and lower circular knives, respectively, while the adjusting mechanism of the upper wedge

15 includes the ghw associated with the upper wedge and the displacement unit 2.

However, in this wiring, the cut edge is bounded on both sides by the surfaces of the upper and lower wedges, which reduces its twisting into a spiral helix,

Claims (2)

30, the possibility of edge drilling is significantly reduced. It also requires the presence of a gap between the inclined:, OR, e.chiostoyklin and cylindrical on:. pnos |, about the upper knife for konensapii) (6 ie; iHH l-knives and prevent ;; wedge, as a result of which possible h marking is preserved. In addition to joio, n, mtrika k. 1inov when the distance l: ej The axes of the blades are made from screw assemblies, which reduces set-up time. The purpose of the invention is to increase operational reliability. This goal is achieved by placing the disc shears to retract the cut edge containing the tray placed on the scissors frame in the direction of movement of the edge who in the cutting zone of the disc shears, the upper and lower wedges are installed with the possibility of translational movement by means of adjusting their position relative to the upper and lower circular knives respectively, while the setting mechanism of the upper wedge includes a pull connected to the upper wedge and the displacement unit, additionally equipped with a cup and a thrust washer placed on the tractor and interacting respectively with the tray and with the displacement unit, as well as with the spring located in the glass on the rod and resting against the bottom of the hundred the cana and the thrust plate installed with a gap relative to the glass. FIG. 1 schematically shows the proposed wiring, side view; in fig. 2 shows section A-A in FIG. one; in fig. 3 - section B - B in FIG. 2. Wiring the disc shears for retracting the edge consists of tray 1, rigidly connected by a bracket 2, by means of which the tray heels towards the bed 3 of the disc shears. The input end of the tray is located at the exit of the crochet from the upper 4 and lower 5 circular knives, the exit end is at the edge of the dividing scissors 6. In the guides 7 of the tray, in the cutting zone, the upper wedge 8 and lower wedge 9 are installed with progressive displacement. The lateral surface of the lower wedge 9 is in contact with the end surface 10 of the lower disk knife 5. The lower wedge 9 has a screw mechanism 11 for adjusting the eio position relative to the lower 5 disk knife driven by the handle 12. The wedge surface of the upper wedge 8 contacts with a cylindrical surface 13 of the upper circular knife 4. The upper wedge setting mechanism 14 includes tu 15, connected to the movement unit 16 as a screw pair 17 and pivotally connected to the upper wedge 8, a cup 18 and a thrust plate 19 placed on t 15 and in-loan, respectively, with the tray 1 and the displacement unit 16, as well as the spring 20 located in the glass 18 per ton 15 and resting against the bottom 21 of the glass 18, and the thrust plate 19, which is installed relative to the glass 18c behind 30rom . The proposed wiring works as follows. After mounting the circular knives 4 and 5, they are set to maximum overlap. The upper wedge 8 from this moment is retracted from the upper disc knife 4. Then, rotating the nut 22 knots; 1a 16 displaces the upper wedge 8 until it contacts the cylindrical surface 13 of the upper disk knife 4 and with further rotation of the nut 22 squeezes the spring 20 until it stops at the end of the cup 18. Thereafter, the nut 22 is rotated in the opposite direction until a gap e is formed between the end of the cup 18 and the stop plate 19. In this position, the stop plate 19 and the nut 22 are fixed by a lock nut 23. The position of the bottom 9 wedge is adjusted by a screw mechanism 11 from the hands 12. When radial adjustment of the circular knives, carried out to adjust for cutting a sheet of a certain thickness, the upper wedge 8 automatically follows the upper, circular blade, being in constant contact with its cylindrical surface due to the spring force. During the idle run of the scissors, when the disk knives 4 and 5 are rotated by the task of cutting the sheet, the wedge 8 is also constantly pressed against the cylindrical surface 1E of the upper disk knife 4, regardless of the size of its beating and wear of the rubbing surfaces. The braking torque created by the friction forces between the continuously clamped to the cylindrical surface of the disk knife 4 of the wedge 8 allows you to choose the backlash in the kinematic chain of the disk knife - motor, as a result of which the shock load in this chain decreases at the moment of cutting the cut sheet. The spring 20 also softens the blow of the cut edge on the upper wedge at the moment of gripping the sheet. When a sheet is cut, the upper wedge 8 is retracted from the cylindrical surface 13 of the upper disc knife 4 by compressing the edge, compressing the spring 20 by the gap size E. The upper wedge prevents the plate 19 from expanding the gap 18 further. 8, the spring 20 is pressed against the cylindrical surface of the upper disk knife 4, choosing a backlash in the kinematic chain of the disk knife — the engine and the gap between the wedge and the cylindrical surface of the disk knife. The use of the invention improves the performance of the disc shears by eliminating downtime associated with adjusting the position of the upper wedge when adjusting the disc knives to trim sheets of different thicknesses and eliminating the results of drilling the edge of the cut sheet. Automatic installation and selection of the gap between the upper wedge and the cylindrical surface of the disk knife eliminates the possibility of drilling the trimmed edge and reduces the dynamic loads in the kinematic chain of the disk knife - the engine. As a result, the operational reliability of the disc shears is increased. Claims of the disc shears for removal of the cut edge, containing a tray placed on the shear bed along the edge, in whose guides in the cutting zone of the disc shears are installed the upper and lower wedges with the possibility of translational movement by means of adjusting their position relative to the upper and lower discs knives, wherein the setting mechanism of the upper wedge includes a pull connected with the upper wedge and a displacement unit, characterized in that, in order to increase operational reliability, the setting mechanism of the upper wedge is equipped with a cup and a thrust washer placed on the rod and interacting respectively with the tray and the displacement unit, as well as a spring located in the glass on the rod and resting against the bottom of the glass and into the stop plate installed with a gap relatively glass. Sources of information taken into account in the examination 1. USSR author's certificate number 257267, cl. In 23 D 19/00, 1968. 2. Drawing Uralmashzavod number 2712.62.600, 1971. V FIG. 2