SU856690A1 - Flying shears - Google Patents

Description

(54) VOLTAGE SCISSORS

one

The invention relates to the processing of metals by pressure and can be used for cutting continuously moving steel.

Volatile scissors are known, comprising a frame, a lower knife, an upper knife mounted on a slider movably placed in vertical guides and connected to the eccentric drive shaft by means of a connecting rod and an intermediate mechanism 1.

The disadvantages of the known scissors are the low durability of the knives, as well as the low accuracy of the determined blanks and the quality of the cut.

The purpose of the invention is to increase the durability of the knives, as well as improving the accuracy of the cut blanks and the quality of the cut.

The goal is achieved by the fact that the shears are volatile, containing a frame, a lower knife, an upper knife mounted on a slider, movably placed in vertical guides and connected to the eccentric drive shaft by means of a connecting rod and an intermediate mechanism, fitted with a horizontal mechanism installed in the frame her body with vertical grooves, the lower knife and the vertical slider guides of the upper knife are mounted in the housing, and the intermediate mechanism is made in the form of a hinged side tured on the stubble bed with their own part of the beams, some shoulders of which are pivotally connected to the connecting rod of the upper knife slider, while others are provided with rollers installed with the possibility of contact with the eccentric shaft, while the casing is equipped with a horizontal movement mechanism made in the form of a hinge connected to the bed with their ends of the levers with grooves, the main sliders placed in the slots of the levers and pivotally mounted on the centric shaft, and additional sliders; mounted in the vertical slots of the housing and pivotally connected with the free ends of the levers.

Fig, 1 shows a general view of the scissors in section; in fig. 2 is a view A of FIG. one;

20 in FIG. 3 is a view B in FIG. one; in fig. 4 shows a section B-B in FIG. one.

Claims (1)

The shears contain a bed 1, in the upper part of which an electric motor 2 is mounted, connected by a flexible coupling with a flywheel 3. In the bores of the bed 1 an eccentric shaft 4 is installed with two lateral eccentrics on which two sliders 5 are hinged, having the ability to move along grooves in the rods 6 located on both sides of the housing 7, and the connecting rods 6 have the ability to swing on the axles x 8 fixed to the upper part of the bed 1. The lower ends of the rods 6 are hingedly connected to the sliders 9, which can move vertically / grooves in the housing 7, which, in turn, has the ability to move along a horizontal groove in the frame 1. Fixed on the eccentric shaft 4 profiled fists 10 interact with the rollers 11, hinged on the axes 12, connected to the beams 13, having the possibility of free rolling on the axis 14 fixedly mounted in the upper part of the frame I. The slider 15 by means of the axes 16 and 17 of the tongue 18 is pivotally connected to the beam 13 and has the ability to move along rails 19 located in the housing 7 To hold the slider in one position are uravnoveshivateli spring 20. On the slider 15 are fixed the upper blade 21 and the housing 7 - lower knife 22. The eccentric shaft 4 by way of gears 23 and 24 and the clutch (not shown) associated with the actuator. The material is fed to the cutting zone with roller feed 25. The proposed scissors work as follows. A motor 2 mounted on frame 1 drives a flywheel 3 through flexible coupling, which by means of gear wheels 23 and 24 transfers rotation to the eccentric shaft 4 and the sliders 5 that are illuminated on its cranks 5. Rotary movement of the eccentric shaft through sliders 5 moving along the grooves in the connecting rods 6, is converted into rocking motion of the connecting rods 6, which, in turn, through the sliders 9, communicate a horizontal translational motion to the housing 7. In this case, the eccentrics are arranged in such a way that Phase rotation of the shaft, at time of contact of the upper knife with the feed-meth Allom housing 7 acquires a velocity avnuyu p-feed velocity of the metal. During movement, the housing 7 is simultaneously overflowing (still the slider 15 with the upper knife, the movement of which along the guides 19 is determined by the dimensions of the connecting rod 18 and the profile of the cam 10. With the fixed beams 13, the axis 17 together with the slider approaches the supplied metal in a radius curve. the blades body 7 continues to move with the speed of the supplied metal, simultaneously cutting and moving the body 7 with the knives 21 and 22. After the end of the cutting, the beam 13 under the action of the balancer 20 in accordance with the failure in the cool profile and 10 are lifted up, carried along by the slider 15 with the knife 21. The knives 21 and 22 open and return together with the body 7 to the starting position before the cut. The design of the proposed scissors allows for an exact match between the speeds of the knives and the metal being cut, as well as cutting the metal with a small longitudinal stiffness, eliminates the rotation of the knives relative to the metal being cut and, accordingly, additional loads on the knives, which increases the durability of the knives and improves the accuracy of the cut blanks and the quality of re behind. Claims of flying scissors containing a frame, a lower knife, an upper knife mounted on a slider movably placed in vertical guides and connected to the eccentric drive shaft by means of a tongue and an intermediate mechanism, in order to increase the durability of the knives, also improving the accuracy of the cut blanks and the quality of the cut, they are equipped with a frame with vertical grooves installed in the frame with the possibility of horizontal movement relative to it, the lower knife and the vertical The upper slider guides of the upper knife are mounted in the housing, and the intermediate mechanism is made in the form of middle beams that are hinged on the frame with their middle part, one shoulders of which are hinged to the top knife of the slider, and others are fitted with rollers installed with the possibility of contact with the eccentric shaft, wherein the body is provided with a horizontal movement mechanism, made in the form of hingedly connected with the bed, with their ends of the levers with grooves, of the main sliders located in the slots of the levers and pivotally mounted on an eccentric shaft, and additional sliders mounted in the vertical slots of the housing and hinged to the free ends of the levers. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 452446, cl. B 25 D 25/06, 1971 (prototype). go-i -L gudf ( I / f ig.Z