SU897423A1 - Flying shears for cutting strip material - Google Patents

Description

I

The invention relates to the processing of metals by pressure and can be used for cutting strip material.

Flying shears for cutting strip material are known, containing a frame installed in the supports of the frame parallel to each other the main and auxiliary eccentric shafts, the frame with the upper knife mounted on the main eccentric shaft with the possibility of swinging relative to it and connected with the eccentrics of the auxiliary shaft , caliper with lower knife, mounted in guide frames with the ability to move relative to it and interact with eccentrics of the main shaft, cylindrical gear connection, one but whose wheel is rigidly mounted on the main eccentric shaft, and the other is free on the auxiliary eccentric shaft, as well as the drive

rotation of the main eccentric,

The design of the known scissors is compact, the swinging of the frame with the upper knife and the cutting of the strip is carried out from a single drive, however, it is possible to cut only the moving strip.

The purpose of the invention is to differentiate technological capabilities by enabling the cutting of a fixed strip material.

The goal is achieved by the fact that flying shears for cutting strip material containing a frame, installed in the supports of the frame parallel to each other main and auxiliary eccentric shafts, a frame with an upper knife mounted on the main eccentric shaft with the possibility of swinging relative to it and connected with auxiliary shaft eccentrics, caliper with lower knife mounted in guide frames with possible 389

moving against it and borrowing with eccentrics of the main shaft, a cylindrical gear connection, one wheel of which is fixed rigidly on the main eccentric shaft, and the other - freely on the auxiliary eccentric ala, as well as a rotation drive of the main eccentric shaft, is equipped with a mechanism for disconnecting the auxiliary eccentric shaft from the drive rotation, made in the form of a spline-mounted dinen on the auxiliary eccentric shaft with the ability to move It has a drive coupling with protrusions on its end surfaces, while on the base and on the end surface of the gear wheel of the auxiliary eccentric shaft, the recesses corresponding to the projections of the coupling are made on the coupling side.

Fig. 1 shows a kinematic scheme of scissors; in fig. 2 — a gear-engagement and an axially switchable clutch, which is in the clutch position of the auxiliary eccentric shaft during the cutting period; in fig. 3 - the same, in the position of fixing the auxiliary eccentric shaft during the cutting period of the stopped strip.

The shears contain a stationary bed 1 mounted in bearings parallel to each other by a main eccentric shaft 2 and an auxiliary eccentric shaft 3, a frame 4 with upper iodine 5 mounted for swing on the main eccentric shaft 2, a support 6 with lower knife 7 mounted with possibility of movement in frame 4 and connected by rollers 8 to the main eccentric shaft 2, ti g 9 connecting the auxiliary eccentric shaft 3 to the frame 4, a cylindrical gear, the wheel 10 of which is connected to the main eccentric ovym Ba. scrap 2, and the wheel 11 is mounted on the auxiliary eccentric shaft 3 with the possibility of free rotation. The cylindrical engagement is housed in the housing 12 rigidly connected to the bed 1. The main eccentric shaft 2 rotates from the drive 13. On the auxiliary eccentric shaft

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3 between the casing 12 and the -ropnoNi corner of the wheel 1 1 is mounted () left) 1a or ishitsa is switched in the axial direction of the coupling 14. At the ends of the coupling 14

5, the locking protrusions 15 are made, and the depressions 16 corresponding to these protrusions 16 on the hub of the gear wheel I1 and on the body 12. The coupling 11 moves from the hydraulic cylinder 17.

10 The work of the proposed scissors is carried out as follows. To cut the moving strip 18, the hydraulic cylinder 17 moves the sleeve 14 to join with a toothed pin.

15 11, i.e. until its projections 15 enter the recesses 16 of the wheel 11. When the drive 13 is turned on, the main eccentric shaft 2 and the auxiliary eccentric shaft 3 rotate simultaneously. At the same time, the main eccentric shaft 2 moves the caliper 6 with the knife 7, and the auxiliary eccentric shaft 3 rotates the frame 4 with the knife 5 and the caliper 6 through the ti 9, ensuring the cutting of the moving strip to dimensional lengths.

To cut the stopped strip 18, the hydraulic cylinder 17 moves the sleeve 14 until it is connected to the housing 12,

30 i.e. until its projections 15 enter the recesses 16 of the housing 12, thereby ensuring the stationary position of the auxiliary eccentric shaft 3 and the frame 9 connected thereto through

J5 4. When the drive 13 is turned on, only the main eccentric shaft 2 rotates, moving the caliper 6 with the knife 7, cutting the stopped strip.

 Flying scissors described konst-. The instructions have advanced technological capabilities due to the possibility of cutting the immobile strip material. 45

Claims (1)

Invention Formula Flying shears for cutting strip material containing a frame installed in the frame supports parallel to each other the main and auxiliary eccentric shafts, the frame with the upper knife mounted on the 55 Main eccentric shaft with the ability to swing relative to it and connected with the eccentrics of the auxiliary shaft, supgtort with