Ningbo fudu automation equipment co. LTD
Contact: Mr. Fu
Phone:13566606880
Tel:0574-23709308
Fax:0574-23709318
Website:www.nbfud.com
Website: en.nbfud.com
E-mail:fdsc@fudunb.com
Add: lane 266, erheng road, ningfeng north road industrial zone, changhe town, cixi city, zhejiang province
Ignition gun barrel when we need to purchase hardware stamping parts, under the same sales negotiation experience, have professional knowledge than do not have professional knowledge to get the price is lower than this is certain, so in the procurement of hardware stamping parts such as precision terminal, what professional knowledge and terminology should we know?Purchasing hardware stamping parts must know the professional knowledge and terminology
Residual stress (yield strength, conditional yield strength) : sign: sigma r;Unit: MPa(or N/mm2), which refers to the stress when the elongation of metal material reaches a certain specified value after the standard distance residual part is removed after drawing.When the specified value is 0.2%, the sign is sigma r0.2.
Extreme intensity: symbol: sigma;Unit: MPa(or N/mm2), refers to the maximum resistance of metal materials to external damage.
Intensity according to the different form of external force action is divided into: lighter flame tube cover
Sigma strength: the symbol sigma BC is the extreme strength of an outside force under pressure
Bending strength: the symbol sigma bb is the limit of strength at which an external force is perpendicular to the axis of the material and causes it to bend
Shear strength: the symbol sigma c is the extreme strength of the force perpendicular to the axis of the material and acting upon it in shear
Tensile strength: symbol: sigma b, refers to the external force is the strength limit of the force of metal stamping parts must know the professional knowledge and terminology
Yield point (physical yield strength) : symbol: sigma s;Unit: MPa(or N/mm2) refers to the ability of a metal material to resist external forces when its deformation (elongation) suddenly increases greatly under a certain degree of tension.
Elastic limit: textile machinery parts manufacturing refers to the metal material by external force (tension) to a certain limit, if remove external force, its deformation (elongation) that disappear and restore the original state, elastic limit refers to the metal material resistance to this limit of external force