Tungsten Alloy Fiber Optic Tip Gold MIM Parts

Product Description

Production method of rectangular copper-tungsten alloy guide wire

• Technical field

The invention relates to a method for producing a rectangular guide wire tip with copper-tungsten alloy.

• Background technique

In the welding process of submerged arc welding and qit4 shielded welding, a large number of guide wire nozzles are used. The function of the wire guide is to ensure that after the welding wire comes out of the welding equipment, the placement technology requires that it always be aligned with the weld seam of the object to be welded for welding operations. Because the wire guide is directly close to the welding seam, the welding wire continuously comes out from the center hole of the guide wire, so the wire guide has the requirements of good electrical conductivity, high temperature resistance and wear resistance. Due to poor electrical conductivity, the current cannot meet the requirements and cannot be welded; if it is not resistant to high temperature, it is easy to deform and affect the operation; the key is to be resistant to wear, because after the welding wire comes out of the wire feeder, the welding wire becomes jagged, and the welding wire continues to flow from If the center hole of the contact tip comes out, if the hole diameter is large, the welding wire will deviate from the weld seam after it comes out, which will affect the welding quality; Affect welding equipment, but also affect welding quality. Currently, alloys are used to produce contact tips, for example, the combined material is composed of alumina dispersed copper located in the core and chrome-copper alloy coated on the outer periphery of the core, and the volume percentage of the alumina dispersed copper is 10- 70%, the volume ratio of chrome-copper alloy is 30-90%; in the manufacturing method of the composite material, a hot extrusion machine is used to extrude the composite material billet and the extrusion cylinder, and the electrical core of the core is used for extrusion. Dispersed copper is used for the contact part, and chrome copper with excellent cold processing is used as the blank for the outside to manufacture the guide wire nozzle and so on.

• Invention content

The purpose of the present invention is to aim at the above-mentioned present situation, aiming at providing a kind of production method of rectangular copper bustard alloy guide wire nozzle with good electrical conductivity, high temperature resistance, wear resistance, long service life and guaranteed welding quality.

The realization mode of the object of the present invention is, the production method of rectangular copper-tungsten alloy guide wire tip, its concrete steps are as follows

1) Take 100Kg of tungsten powder and 3Kg of copper powder 11 soil and put them into a mixer and stir them evenly

2) Mix 100 Kg of the mixed material into No. 120 gasoline 6000 ± 50ml and stir again, and then the gasoline volatilizes

3) The mixture is dried in an oven and passed through a 40-mesh sieve

4) Put the mixture into the grinding tool according to the required amount, put the grinding tool into the hydraulic press, and press the alloy sheet with the required specifications and a thickness of 5 rain with 60 tons of pressure,

5) Put a copper bar of the same shape in the middle or on one side of the formed alloy sheet, and then put an infiltrated copper bar of the same shape on it. The weight of the infiltrated copper bar is 25-30% of its weight, and wrap it together to form a The appearance of the conductive tip, and then put it into a graphite boat of 31OX9OX20O coffee one by one, with an interval of 10±0.1mm between each piece, fill the interval with alumina powder, pat it firmly, and cover it with alumina powder, and put the graphite boat into sintering In the furnace, under the temperature of 13CKTC-14000TC, nitrogen is used for sintering with oxygen barrier, each boat is propelled by a motor, pushed out for 1 hour, cooled, crushed alumina powder, sieved to obtain the contact tip blank,

6) The blank is machined into a wire groove to form a conductive tip.

The conductive tip produced by the present invention can fully meet the needs of welding, high temperature resistance, and the working softening temperature is about 1000°C; due to the use of tungsten, the hardness of tungsten itself is high and wear-resistant, so the conductive tip produced is wear-resistant; use The service life is 3-15 times of the current contact tip. Long service life saves the time of frequent replacement of the contact tip, reduces the labor intensity of workers, improves production efficiency, reduces the cost of use, and saves expenses; due to high temperature resistance and wear resistance, it can ensure that the welding wire does not deviate for a long time Align the center weld seam of the workpiece to ensure high welding quality.

Detailed ways

The contact tip produced by the present invention has a variety of specifications as listed in the accompanying drawings, length 40-70 coffee, width 18-26 mm, thickness 10-16 mm, wire groove radius 2-2. 5 ram. Use tungsten powder 100Kg, copper powder 11 soil 3Kg alloy. The concrete steps that the present invention produces are as follows:

1) Take 100Kg of tungsten powder and 1Kg of copper powder and put them into a mixer and stir them evenly

2) Mix 100 Kg of the mixed material into No. 120 gasoline 6000 ± 2ml and stir again, and then the gasoline volatilizes

3) The mixture is dried in an oven and passed through a 40-mesh sieve

4) According to the required amount, put the mixture into the grinding tool, put the grinding tool into the hydraulic press, press 60 tons of pressure to produce the alloy sheet with the required specification and a thickness of 5 mm

5) Put a copper bar of the same shape in the middle or on one side of the formed alloy sheet, and then put an infiltrated copper bar of the same shape on it. The weight of the infiltrated copper bar is 25-30% of its weight, and wrap it together to form a The appearance of the conductive tip is then packed into a graphite boat of 310X90X200mm one by one, with an interval of 10 ± 0.1mm between each piece. The interval is filled with alumina powder, tapped, and covered with alumina powder, and the graphite boat is put into the sintering furnace In the middle, at 1300'C-140KTC temperature, carry out oxygen barrier sintering with nitrogen, each boat is propelled by motor, 1 hour pushes out, cools down, smashes alumina powder, sieves, obtains contact tip blank

6) The blank is machined into a wire groove to form a conductive tip.

The contact tip is a rectangle, both sides are copper-tungsten alloy 1, and the middle is copper row 2, and oval mounting hole 3 is arranged in the middle of copper row, and semicircular wire slot 4 is arranged on alloy two outsides. The rectangle is 60mm long, 24 legs wide, 12 mm thick, and has a groove radius of 2 mm. The conductive tips shown in the two figures are used together, and the two semicircular wire slots 4 are merged into wire passing holes.

Guide tortoise mouth is rectangle, and both sides are copper-tungsten alloy 1, and the center is copper platoon 2, and circular installation hole 5 is arranged in the center of copper platoon, and semicircle wire slot 4 is arranged on alloy two outsides. The contact tip is 44mm long, 20mm wide, 12mm thick, and the wire groove radius is 2mm. Two conductive tips as shown in the figure are used together, and the two semicircular wire slots 4 are merged into a wire hole.

One side is copper-tungsten alloy 1, and the center is copper row 2, and circular mounting hole 5 is arranged in the middle of copper row, and semicircular wire groove 4 is arranged on alloy side. The contact tip is shaped 6 as shown in the figure, that is, the alloy part 1 is a rectangle, the copper bar part 2 is a rectangle, and the part is a trapezoid with a single slope. The contact tip is 44mm long, 20mm wide, 12mm thick, and the wire groove radius is 2mm. The conductive tips shown in the two figures are used together, and the two semicircular wire slots 4 are merged into wire passing holes.

Metal Injection Molding Process

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