SU1533801A1 - Machine for multiple drawing of wire without creep - Google Patents

Abstract

The invention relates to the field of metal forming and relates to the manufacture of wire from low-plastic, hard-to-deforming alloys on non-slip multi-wire drawing machines. The purpose of the invention is to increase productivity when drawing low-plastic non-ferrous non-ferrous metals and alloys while ensuring the stability of mechanical properties along the length of the wire. The non-slip multiple wire drawing machine contains, by the number of passes, drawing tools 1 and intermediate hollow drums 2 mounted between them. , and at the bottom - a cooling system in the form of pressure 4 and drain 5 pipelines. 1 ill., 1 tab.

Description

The invention relates to the field of metal forming and relates to the manufacture of wire from low-plastic, hard-to-deforming alloys on non-slip multi-wire drawing machines.

The purpose of the invention is to increase productivity when drawing low-plastic non-ferrous non-ferrous metals and alloys while ensuring the stability of mechanical properties along the length of the wire.

The drawing shows the machine unit, a general view.

The device consists of several blocks according to the number of passes, each of which consists of a drawing tool 1 of an intermediate drum 2. A partition is made in the cavity of the drum, dividing the cavity into two parts. In the upper part of the drum concentric with its outer surface, a heating device 3 is installed. In the lower part of the drum, pressure 4 and drain 5 pipelines are installed.

Before starting work, the drawing tool 1 of each unit of the multi-pass wire drawing is installed according to the drawing route into the fiber holder, into which lubricant (soap powder) is loaded, the temperature range of heating is set by an electro-contact thermometer, the heating devices 3 and the cooling system of the drawing drums 2 consisting of pressure 4 and drain 5 pipelines. The sharpened end of the wire is passed through the drawing tool of the 1st unit and clamped into the jaws of the collet, the latter being hung with its hook into the provided slot of the drawing drum. A smooth rotation of the dragging drum is reported until 8-10 turns of wire are wound onto it. The wire is then released from the collet and ne

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the red end is fixed on the roller of the carrier device 6. A rotation is reported to the drum, which is filled with wire about 2/3 of the height of the working surface of the draw drum. After that, the block is stopped, the end of the wire is freed from the roller of the driving device, several turns of the wire are removed from the drum, the end of the wire is sharpened, passed through the upper guide roller 7 and the lower guide roller of the next block, in which refueling is performed again as described. In this way, all units installed in the drag line are charged. The amount of wire on the draw drums of the blocks (percent fill) is established empirically.

Heating devices installed at the top of the drums in the drawing line, tuned to a specific temperature Spiral heating interval (not higher than 600VC), are turned on at the time of charging the machine, the cooling system of the drawing drums is also included. The temperature of the heaters, and hence the wire, is controlled by an automatic temperature control system with a two-stage controller.

Heating of the wire in the volume of the accumulator is carried out by the radiant energy of heat given off by the spiral of the heating device through an annular air gap between the wire wound on the drum and the inner wall of the heating device.

Before the heated wire enters the drawing tool, a layer of powder soap lubricant is applied to its drawing surface, while the latter is periodically shaken by an electromagnetic-lever mechanism.

The proposed device provides the possibility of multi-pass drawing of low-plastic metals and alloys with a large total stretch without intermediate annealing and, which is very important, with ensuring uniformity of the mechanical properties of the wire along the length.

Conduct experimental-industrial drawing extruded annealed billet with a diameter of 05.8 mm alloys of grades LS58-2 and LS59-1. A wire from diameter k 5.8 to diameter i 4.8 is drawn on a single VM 1/550 drawing machine. Heating of the wire before entering the deformation unit of the third unit of the Grün machine is carried out in the drum accumulator of the second block of the Grün machine using a heating device. The temperature of the wire entering the fiber of the third unit of the machine is in the range of 120-180 ° C, which is fixed with a control device using a thermocouple (the wire slides over the junction of the thermocouple). The temperature of the heater coil is in the range of 380-450 ° C. The volume of the wire on the drum (layer thickness) occupies half the gap between the working surface of the drum and the inner wall of the heater. The drawing speed is 1 m / s.

The drawing of brass grades LS58-2 and LS59-1 is carried out to a final diameter j 2.4 mm. The table shows the mechanical properties of the wire on the final diameter of the existing factory technology and experienced heat drawing.

The invention, in comparison with the basic object, which is taken as a prototype, provides an increase in the productivity of the process by providing

ductile non-ferrous non-ferrous metals and alloys with a large total stretch while simplifying the process.

1.When drawing LS58-2 brass from a diameter of $ 4.8 mm to a diameter of 2.4 mm, two annealing and two drawing on a single drawing drawing are excluded.

machine VM 1/550;

2.When dragging LS59-1 brass with diameter & 4.8 mm per diameter 4 2.4 mm excludes one annealing and one drawing per single drawing

machine VM 1/550;

The stability of the mechanical properties along the length of the wire is ensured.

The economic effect of the invention will be about 90 thousand rubles.

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Claims (1)

Invention Formula five 0 five A non-slip multiple wire drawing machine containing drawing tools according to the number of passes and intermediate vertical hollow drums installed between them with a cooling system in the internal cavity, characterized in that, in order to increase productivity when drawing non-plastic hard-to-deform non-ferrous metals and alloys, ensuring the stability of mechanical properties along the length of the wire, it is equipped with a heating device placed in front of each drawing tool, while In the internal cavity of each drum, a Q partition is made, dividing the cavity into two parts, and in the upper part of the cavity a heating device is concentric with the working surface of the drum, and a heating system is installed in the lower part Multi-pass dragging is small. Alloy LS58-2, wire 4 2.4 mm Known technologists (V, MPa | o, TL (experimental drawing JGe, MPa I S, Z Drawing 5.8-4.8, BM 1/550 Annealing: furnace BEAM Drawing 4.8 - 4.0 VM 1/550 Drawing 5,8- 4,8 ВН 1/550 Annealing: BEAM furnace. Wire drawing with heating in the accumulator of the block drum. Annealing: BEAM trailing machine Drawing 4,0--3,35 Grün composition VM 1/5504,, 0 - Drawing TU 340 TU 340 - 3,35 ,, 4 3, 4 on a 13-fold drawing machine VM 15/450 Alloy LS59-1, wire I 2.4 mm Drawing 5.8 4.8 BM 1/550 Annealing: Furnace BEAM Drawing 4,, 8 BM 1/550 Annealing: Furnace BEAM Drawing 3.8 - 2.4 15-fold hair chilny car VM 15/450 350 31 Drawing 5.8 4.8 BM 1/550 Annealing: BEAM furnace. Wire drawing with heating in the drum accumulator of the Grün drawing machine unit with a composition of 4.8 - 4.0- -3.35-2.8 -2.4