Article on Mechanical Machining

Article on Mechanical Machining

Machining a Conical Part:

To machine a conical part with a cone length of 300mm and a cone angle alpha of 30 degrees (tan alpha = (D-d)/2l), the lathe method can be used.

Machining an Accurate Conical Hole:

To machine an accurate conical hole, the appropriate method is reaming.

Carbonizing:

The type of steel that requires carbonizing with quenching is C20.

Manual Arc Welding:

The welding method that typically uses a power source with a continuous downward slope characteristic is manual arc welding.

Continuous Casting Mold:

The type of mold used in casting that requires water cooling during metal filling is the continuous casting mold.

Grinding Cutting Speed:

The appropriate cutting speed for the grinding operation is 35m/second.

Cutting Machine with a Ratchet Mechanism:

The type of cutting machine that uses a ratchet mechanism for blade movement is a shaper.

Cutting Depth:

The cutting depth t for a group of drilling machines is t = d/2 mm (d is the diameter of the cutting blade).

Castability:

The factor that directly affects the castability of a material is shrinkage.

Back Rake Angle of Turning Tool:

The back rake angle of a turning tool affects the friction and the machined surface.

Appropriate Machining Method:

The appropriate machining method to form a 50mm diameter x 500mm long steel round bar into a 30mm x 30mm steel square bar with a length less than 500mm without material loss is rolling.

Machine Tool that Doesn’t Machine Holes:

The type of machine tool that cannot machine holes is a shaping machine.

Rotary Main Motion of the Cutting Tool:

The rotary main motion of the cutting tool belongs to the milling machine group.

Incomplete Annealing:

The heat treatment method that involves heating to a temperature T

Machine for Machining Flat Surfaces:

The machine tool that can machine flat surfaces is a planer.

Mold that Reduces Fluidity:

The mold that most effectively reduces fluidity is the metal mold.

Cutting Tool Without Controlled Geometric Parameters:

The cutting tool whose geometric parameters are not controlled is a grinding wheel.

Shaping Tool Traverse:

The tool traverse area calculated in mm per double stroke belongs to the shaping group.

Bare Welding of Stainless Steel Welding Wire:

The method that can be used for bare welding with stainless steel welding wire is MAG (Metal Active Gas).

Material Not Used for Melting Iron in a Vertical Furnace:

The material not used for melting iron in a vertical furnace is cast iron.

Material Melted in a Vertical Furnace:

The material that is melted in a vertical furnace is GX21-41.

Shaping Tool Traverse:

The tool traverse used for the shaping operation is 0.5mm/double stroke.

Carbon in White Cast Iron:

In white cast iron, carbon mainly exists in chemical bonding.

Material for Hardness Increase by Quenching:

The material that uses quenching to increase hardness is 100Cr.

Reciprocating Straight Motion of the Cutting Tool:

The main motion of the cutting tool that is reciprocating straight motion belongs to the planing machine group.