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:Questions and Problems 1. In a wire drawing operation, why must the drawing stress never exceed the yield strength of the work metal? 2. Describe the wire drawing process. 3. Show with aid of sketch the following: 4. (a) Two tube drawing processes (with and without mandrel) (b) details of draw die for drawing round rod or wire 5. List the advantages of wire and bar drawing 6. Which of the four basic bulk deformation processes use compression to effect shape change (more than one)? (a) bar and wire drawing, (b) extrusion. (c) forging, and (d) rolling, 7. List the advantages of wire and bar drawing 3. Theoretically, the maximum reduction possible in a wire drawing operation, under the assumptions of a perfectly plastic metal, no friction, and no redundant work, is which of the following (one answer)? (a) zero, (b) 0.63, (c) 1.0, or (d) 2.72. 4. Which of the following bulk deformation processes are involved in the production of nails for lumber construction (more than one)? (a) bar and wire drawing, (b) extrusion, (e) forging, and (d) rolling. 5. Show the preparations of the work prior to wire drawing process. Problem: Wire of starting diameter = 3.0 mm is drawn to 2.5 mm in a die with entrance angle = 15° degrees. Coefficient of friction at the work-die interface = 0.07. For the work metal, K = 500 MPa and n=0.30. Determine: (a) area reduction, (b) draw stress, and (c) draw force required for the operation.
The aluminum ferrule got a special wire-drawing finished that has a non-mirror-like metallic luster,
It has a very strong decorative effect like silk satin, as if giving new vitality and life to the ordinary metal,
so the drawing treatment has more and more market recognition and widely used.
This technology made the ferrule wear-resistant, anti-oxidation, and have clear texture.
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The handles are made of maple.
The color of maple is very harmonious, the gloss is excellent, and it is very beautiful.
The handle produced by maple has clear lines and unique patterns.
Maple has good processing ability and the characteristics of warm in winter and cool in summer.
It is strong, durable and also a very high-end material.
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