SU409479A1 - Pulse machine for wasteless cutting of moving continuous ingots and rolled - Google Patents

Description

one

The invention relates to the field of metal forming and is used primarily for cutting hot steel continuous ingots in continuous casting of steel and alloys.

A known impulse machine for wasteless cutting / moving continuous ingots and rolled products, containing a movable frame, in one of which a communicating impulse chamber and a scraper cylinder with a working stem installed in it are molded, and a different crossbar is attached to the other cross member knife.

However, when knives are inserted into the cut ingot, pressure on the side edges of the knives occurs on the metal, which leads to the appearance of a total tensing force that acts on the metal web; 1a with the knife edges and is a breaking force for this web. When the force exceeds the resistance, the stump is released, the latter is discharged, and the knives are knocked out at high speed, the cut parts of the workpiece are scattered to the opposing sides, causing the axial force impulse. If the metal has a high plasticity, then the bridge is insignificant, the axial impulse is small and does not affect the equipment that supplies the workpiece.

Metal blanks, obtained by continuous thickness, has a pronounced cast structure, has integrity defects and nonmetallic inclusions, which greatly reduces the ductility of the metal even at relatively high temperatures (800-1000 ° C), the brown ones are characteristic in the cutting zone installations continuous times; seams. This increases the height of the gap of the lintel, which reaches 20-40% of the height of the spit in the cross section. In this case, the shearing force of the knives causes the appearance of an axial impulse of large force, which adversely affects the equipment used to move the billet.

In order to reduce the impact loads on the equipment, which prevent the billets, and to improve the quality of the cut, the proposed template is fitted with an edge clamp installed in an annular groove, made on the outer surface of the working stem, conical with a protrusion that interacts with the cut rolled, and in the lower part of the working rod in full 1y axial and radial channels.

Connection pulse chamber with the cavity of the expansion cylinder under the floating ring clamp.

FIG. i schematically shows the proposed impuls machine, a general view with partial cuts; in fig. 2 - the phase of the beginning of the outside of the knives into the ingot; in fig. 3 - phase of the end of cutting and the action of bending forces.

The machine includes an energy center consisting of a pulsed chamber 1 filled with energy carrier, a locking device 2, which overlaps the bypass hole 3 in the lyijiHtLUp 4 trap, in which the piston 5 is mounted for movement with the working rod 6 carrying the knife 7. and the annular the clamp 8 with the protrusions 9 of STI is embedded in the metal. The operating rod 6 is provided with channels 10, one input of which is in communication with the podpnevny space of the deflating chi; the rod 4 and the other is blocked by an annular clamp 8 connected with the working rod 6 with a minimum clearance ensuring the freedom of their relative movement.

The energy center is connected by a strut 11 with a workbench 12, carrying the knife 13 and fitted with protrusions 14, arranged symmetrically to the protrusions 9 of the ring pressing. Between the knives 13 and 7 razlozhen cut ingot 15.

In the initial position (see Fig. 1), the cut cjmroK 15 is located between the blades 13 and 7. The impulse chamber 1 of the power unit, sealed by the locking device 2, is filled with components of the energy carrier that ignite and burn with increasing pressure. When the maximum pressure is reached, the locking device 2 opens the bypass hole 3, and the energy source penetrates into the sub-piston space of the expansion cylinder 4. Under pressure of the energy carrier, the piston 5 with the working rod 6 and the knife 7, as well as the ring clamp 8 supported on the piston 5 move upward in the direction of the ingot 15 and the power unit and associated with it by the straps 11 of the sabot 12 with the knife 13, having experienced recoil, move downwards.

After insertion of the knives 13 and 7 into the ingot 15 {the working rod 6 removes the braking effect of the ingot 15 to the penetration of the knife 7, as a result of which the ring clamp 8 begins to overtake it, approaching the projections 9 to the lower surface of the ingot 15 (see Fig. 2 ).

Upon further movement (see Fig. 3), the ring clamp 8 contacts the projections 9 of the ingot 15, and the channels 10 open, together with the space under the ring stem with the expansion cylinder. Under the pressure of the energy carrier, the ring clamp 8 is pressed against the piece, as a result of which the projections 9 are inserted into the ingot 15. The projections 14 of the working 12 are implanted simultaneously, so that during the final cut of the ingot, the action of the expanding forces of the blades 13 and 7 is compensated by holding forces from side 9 and

1h The effect of these forces is explained by the arrows in FIG. 3.

At the end of the cutting, the moving members return to their original position.

Claims (1)

Invention Formula A pulse machine for waste-free cutting of moving non-continuous ingots and rolled products, containing a movable frame, in one of the crossbars of which are connected interconnected pulse chamber and a cylinder with a working blade mounted on it, and a different crossbar attached to the other crossbar, characterized in that, in order to reduce the impact loads on the equipment supplying the workpieces and to improve the quality of the cut, it is equipped with an external the surface of the working rod, concentric with it, the floating ring clamp with protrusions interacting with the rolled steel, and in the 1st section of the working rod there are axial and radial channels connecting the pulse chamber with the cavity of the expansion cylinder under the floating ring clamp. Fg / hL FIG. 2