SU549276A1 - Flying scissors - Google Patents

Description

(54) VOLTAGE SCISSORS

The invention relates to metallurgical equipment and can be used in 1 ProfilvigibochCH | Nyh aggregates, and lgatah cutting | And so on.

Flying scissors are known, containing two double-edged shafts, on one of which a BqpsHHH knife is mounted, and on the other is a horizontal beam with (deum parallel lower blades installed with a gap, paiBHHM width of the upper knife, and with the possibility of le / roll v. Length beams 1.

When working, the top one enters into the space between the bottom of the junction, and cuts a part of the metal whose width is equal to the thickness of the iBeipxHero type eye.

However, cutting of closed profiles with such scissors is impossible, as in the process of cutting the profile is crushed. In order to prevent profile retaining, it is necessary to compress the profile along the (perimeter) in the cutting zone.

The volatile saws currently used for cutting closed loops of a roll-forming bending machine have a low productivity of three cutting speeds of up to 1.5 m / s and, moreover, create noise that exceeds sanitary standards.

The aim of the invention is to provide cutting of closed profiles on profile-bending units and an increase in the productivity of these units.

This is achieved by the fact that the proposed flying shears contain two crank shafts, "ojjHOiM" of which the upper knife is mounted, and the other has a horizontal beam with two parallel lower legs installed with a gap equal to the width of the upper knife and can be moved along the beams are equipped with two additional lower knives, each of which is mounted on a horizontal beam in the flatness of the corresponding main lower knife, forming a caliber with it in the shape of the profile being cut. FIG. 1 and 2 shows the kinematic scheme of the proposed scissors; in fig. 3 - section A-A of FIG. 2

Flying shears contain an upper knife 7 fixed on a support 2, pivotally connected to the crank shaft 3, and the lower knives 4 and 5 (the other two lower knives are not shown in the drawings) mounted on the beam 6 s. Adol Beam Movement. Beam 6 is mounted on horizontal 7 satellites with the ability to move in the material feed direction in the housing 8, which is pivotally connected to the crank shaft 9.

In addition, the housing 8 has the ability to vertically move along the guides m 0 rigidly connected to the caliper 2.

The kinematic connection between the shaft-bearing shafts 3 and 9 is made through a gear system, // - 1} 4.

On the beam 6, the pnevmotsilind.ry 15 and 16 drive the lower blades are installed.

PIR1V01DO, m for scissors, serves as an electric motor J7.

Flying "burns" work in the following way.

The electric motor U7, through the gear system, rotates the drive shafts and 9 in different directions. The support 2 and the housing 5, which are connected with crank shafts, (Move each other trajectory. Vertical mounts 10, gesture connected with the suports 2, also move along circular trajectories, preventing the rotation of the support 2 and the housing 5 around horizontal axes, in connection with which the caliper and Kopinyc make a plane-parallel movement. When moving vertical breeders, the beam 6 with the sets of knives 4 and 5 moves back-locking along the axis of movement of the material being cut by horizontal soda l yuschim 7.

In the initial position at the no-load section of the knives (Fig. 1), the sets of knives 4 VI 5 have been explored, and the i-film freely passes into the shaped hole between the set of knives. When the knives approach the cutting zone, the command device 18, associated, for example, with the curved shaft 9, sends a command to include: into the operation of the pneumatic cylinders 15 and 16, which (Move the sets of knives towards each other before they mutually lag on (fi). 2). In this case, the profile material is crimped by the shaped planes of the set of knives, and the upper knife / which entered the cutting zone cuts the profile material simultaneously ino with two parallel planes. The cut part of the profile material is equal in width to the thickness And | the knife goes to waste.

After the knives come out of the cutting zone, ksmandoaparat 18 gives a command to reverse the cylinders which disengage the sets of knives to their initial position. The process is then repeated in the sequence indicated.

Thus, the shaped profile at the time of cutting is compressed on the nepH.-vieTipy lower knives, forming two successively

caliber gauge, which prevents material from being washed.

Claims (1)

1. US patent No. 2.509.760, 73-88, 1955.