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Multi-mold cold-rotary-swaging and cold-drawing machining method for AgSnO2 wire rods

A mold cooling and wire rod technology, applied in the direction of metal processing equipment, etc., can solve problems such as low efficiency, high energy consumption, complex process flow, etc., and achieve the effects of high productivity and product yield, simple operation, and small stress gradient

Active Publication Date: 2017-08-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above steps are repeated at least once to obtain AgSnO with better grain refinement processability 2 For wire materials, the advantage of this method is that upsetting can refine the grains, break the oxide film on the boundary of powder particles, and the large extrusion ratio can eliminate holes in the material, improve the compactness of the material, and improve the processing performance of the material, but the process Complex process, high energy consumption and low efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] S1: AgSnO after extrusion 2 Annealing wire (φ6mm): annealing process 650 ° C, 5h, air; heat treatment equipment is a bell-type resistance furnace;

[0035] S2: Install a 4.5mm swaging die on the swaging machine, and the thickness of the gasket is 0.2mm;

[0036] S3: Place the wire material on the pay-off reel and feed the wire into the swaging die manually, then wind the wire out of the swaging to the receiving reel, adjust the speed of the receiving reel, set it to 6m / min, and the diameter of the wire to be 4.6mm;

[0037] S4: Replace it with a 3.5mm swaging die, and the thickness of the gasket is 0.2mm;

[0038] S5: Place the wire material on the pay-off reel and feed the wire into the swaging die manually, then wind the wire out of the swivel to the receiving reel, adjust the speed of the receiving reel, set it to 8m / min, and the diameter of the wire to be 3.1mm;

[0039] S6: Replace it with a 2.0mm swaging die, and the thickness of the gasket is 0.2mm;

[0040] S...

Embodiment 2

[0049] S1: AgSnO after extrusion 2 Annealing wire (φ6mm): annealing process 700°C, 3h, air; heat treatment equipment is a bell-type resistance furnace;

[0050] S2: Install a 4.5mm swaging die on the swaging machine, and the thickness of the gasket is 0.1mm;

[0051] S3: Place the wire material on the pay-off reel and feed the wire into the swaging die manually, then wind the wire out of the swivel to the receiving reel, adjust the speed of the receiving reel, set it to 7m / min, and the diameter of the wire to be 4.7mm;

[0052] S4: Replace it with a 3.5mm swaging die, and the thickness of the gasket is 0.1mm;

[0053] S5: Place the wire material on the pay-off reel and feed the wire into the swaging die manually, then wind the wire out of the swaging to the receiving reel, adjust the speed of the receiving reel, set it to 9m / min, and the diameter of the wire to be 3.2mm;

[0054] S6: Then replace it with a 2.0mm specification swaging die, and the thickness of the gasket is 0...

Embodiment 3

[0064] S1: AgSnO after extrusion 2 Annealing wire (φ6mm): annealing process 800°C, 2h, air; heat treatment equipment is a bell-type resistance furnace;

[0065] S2: Install a 4.5mm swaging die on the swaging machine, and the thickness of the gasket is 0.3mm;

[0066] S3: Place the wire material on the pay-off reel and feed the wire to the swaging die manually, and then wind the wire out of the swivel to the receiving reel, adjust the speed of the receiving reel, set it to 8m / min, and the diameter of the wire to be 4.5mm;

[0067] S4: Replace it with a 3.5mm swaging die, and the thickness of the gasket is 0.3mm;

[0068] S5: Place the wire material on the pay-off reel and feed the wire into the swaging die manually, and then wind the wire out of the swivel to the receiving reel, adjust the speed of the receiving reel, set it to 10m / min, and the diameter of the wire to be 3.0mm;

[0069] S6: Then replace it with a 2.0mm specification swaging die, and the thickness of the gaske...

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Abstract

The invention relates to a machining technology for an electric-contact composite material, and aims to provide a multi-mold cold-rotary-swaging and cold-drawing machining method for AgSnO2 wire rods. The method comprises the steps of carrying out annealing treatment on raw materials of the AgSnO2 wire rods, then placing the raw materials of the AgSnO2 wire rods in a pay-off spool and continuously feeding the raw materials of the AgSnO2 wire rods into a rotary swaging mold for rotary swaging treatment; repeating the operation twice, and replacing the rotary swaging mold with a slightly smaller rotary swaging mold; coiling wires and then carrying out annealing and acid-pickling treatment; carrying out cold-drawing machining by using a wire drawing mold with the first deformation amount less than 10% and selecting the wires with the diameter 0.05-0.1mm greater than the diameter of finished products to be machined for softening annealing and acid-pickling treatment; and selecting a wire drawing machining mold matched with the specification of the finished products for wire drawing treatment and cleaning the wires obtained from by wire drawing with an ethanol solution. According to the method, a cold machining technology combining rotary swaging and drawing is provided, the machining advantages of low stress strain and small stress gradient of rotary forging machining are utilized, and therefore the machining purposes that other technologies, such as extruding, rolling and drawing are difficult to complete can be achieved. The technological method is simple to operate and high in productivity and product yield.

Description

technical field [0001] The invention relates to a processing method of an electrical contact composite material, belonging to the technical field of metal matrix composite materials. [0002] technical background [0003] AgSnO 2 Electrical contact materials are mainly used in electrical switches such as relays, contactors, and switches. They have good anti-welding, arc erosion resistance and wear resistance, and are harmless to the human body. They have the potential to replace traditional AgCdO electrical contact materials. But due to Ag and SnO 2 Poor wettability, Ag and SnO 2 The interfacial bonding of the particles is poor, coupled with the SnO 2 The high hardness of SnO in processing 2 The bonding interface with the matrix Ag often becomes a stress concentration area and a source of cracks. So AgSnO 2 The plasticity and ductility of the material are poor, and it is difficult to process. In the process of extrusion and drawing, problems such as broken wires and cra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/04B21J5/00B21C1/00C22F1/14
CPCB21C1/003B21C37/047B21J5/008C22F1/14
Inventor 吴新合张玲洁沈涛杨辉陈晓樊先平祁更新
Owner ZHEJIANG UNIV
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