SU956180A1 - Shearing press - Google Patents

Description

() PRESS SCISSORS

Claims (1)

The invention relates to the field of metal forming and is intended for the separation of rolled metal, in particular rods. Press shears are known that contain a frame with a fixed blade fixed on it, a slide with a movable blade fixed on it, associated with a reciprocating drive, a clamping mechanism for the bar to be cut, and a support mechanism for the piece to be cut. made in the form of a wedge clamp, equipped with an individual pneumatic, hydraulic or propeller driven and carrying clamping knife, in conjunction with another knife attached to the frame providing a bar clamp. The support mechanism of the cut-off workpiece is combined with the cutting mechanism and is made in the form of a frame moving from the main drive with a balancing power cylinders and a supporting knife. The main drive (crank) frame is connected through a system of two shoulders. The cut piece is supported by its clamping between the knife fixed on the frame and the cutting knife fixed on the slider, i.e. The clamping and supporting mechanisms are quite complex. The control systems of the power cylinders applied in these mechanisms are also complex. The support mechanism has a multi-link kinematic chain combined with a cutting mechanism. Therefore, a significant part of the force developed by the main drive is spent on the non-production of the elastic deformation of the links of the kinematic chain, which increases the energy consumption of the machine. In addition, Okalina accumulates on horizontal knives (rods are heated), which negatively affects the quality of the cut. 39 The purpose of the invention is to simplify the design and increase the profitability of scissors. The goal is achieved by the fact that in press shears containing a frame with a fixed knife fixed on it, a slide with a movable knife fixed on it, connected with a drive of reciprocating movement, a mechanism for clamping the cut bar and a support mechanism from the cut piece, each bar clamping mechanisms and support of the cut-off workpiece are made in the form of a pair of levers with clamping half matrices and copiers mounted with the possibility of interaction with one of the ends of the levers. The free ends of the levers of the bar clamping mechanism are fixed on the frame, its copiers are mounted on the slider. In the mechanism for supporting the cut-off workpiece, the free ends of the levers are hinged on the slider, and its copiers are mounted on the frame. Fig, .1 is a diagram of the press scissors; in fig. 2 is a view A of FIG. 1 (bar clamping mechanism); on fig.Z view B in fig, -1 (the mechanism of support for the workpiece). Soda press scissors (ejat frame 1, fixed fixed knife 2 fixed on it, movable cutting knife 3f rigidly fixed on slider 4 connected to connecting rod-curved thorn drive 5, mechanism for clamping the cut bar 6 and supporting mechanism for the cut workpiece 7 The bar clamping mechanism consists of two symmetrically positioned levers 8, on each of which a clamping half matrix 9 is fixed. The copiers are fixed on the slider 4. The support mechanism of the cut off blank is made similar to the bar clamping mechanism, but mounted on the scissors in the rotated position 180. The corresponding ends of the levers 8 are hinged on the slide k, and the copiers 12 are on the bed 1. In mechanisms 6 and 7, the plane of the connector of the semi-matrix 9 is located vertically 04 Press shears are operated as follows. The bar 6 is fed into the cutting zone by the rollers 13 up to the stop Sh. Under the action of the actuator 5, the slider L moves downwards. Together with the slider k, the copiers 11 of the bar clamping mechanism and the levers 8 of the mechanism for supporting the workpiece fixed on it move down. At the same time, the copiers 11 run onto the rollers 10 of the levers 8, as a result, the semi-mattresses 9 approach each other, clamping and holding the bar 6 during the cutting process. At the same time, the rollers 10 on the arms of the support mechanism of the workpiece are incident on the copiers 12, and the half-matrix is clamped and hold the workpiece 7 at the moment of cutting. The profile of the copiers 12 ensures the uncoupling of the lever at the very end of the working (forward) stroke of the slide (see the lower bevels on the copiers 12), and the cut piece falls free. . During the return stroke of the slide C, the levers of both mechanisms diverge and the cycle of the segments is repeated. Offered press shears are simple in design and economical in operation. Claims of the Invention A press-scissors containing a frame with a fixed knife fixed on it. A slide with a movable knife fixed on it associated with a reciprocating drive, a mechanism for clamping the cut bar and a mechanism for supporting the cut-off workpiece, , in order to simplify the design and increase the efficiency of work, each of the bar clamping mechanisms and support of the cut-off workpiece is made in the form of a pair of levers with clamping half-matrices and copiers mounted with interacting ones with one of the ends of the arms, the free ends of the arm rod clamping mechanism is pivotally mounted on the frame, mounted on its copiers polzuno and the mechanism support the free ends of the arms of the cut blanks are hinged on the slider, and copiers are mounted on the frame. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 58592 4, cl. In 23 D 23/00, 1971 (prototype). / 11111 &  l // / f go t3 / 2 / f