Powder metallurgy of iron and iron alloys

 

   In powder metallurgy production, the amount of iron powder is much larger than its metal powder. 60% to 70% of iron powder is used to make powder metallurgy parts. The main types are iron-based materials, iron-nickel alloys, iron-copper alloys, and iron alloys and steels. Powder metallurgy iron-based structural parts have high precision, small surface roughness, no need or need only a small amount of cutting, saving materials, high productivity, porous products, immersible lubricating oil, anti-friction, vibration reduction, noise reduction and so on. Widely used in the manufacture of mechanical parts, such as adjustment washers, adjustment rings, end caps, sliders, bases, eccentrics on the machine, oil pump gears, piston rings in the car, transmission gears on the tractor, piston rings, and joints, spacers Set, oil pump rotor, retaining sleeve, roller, etc.

The grades of powder metallurgy iron-based structural materials use the Chinese characters "FTG" of "powder", "iron" and "construction", the 10,000 parts of carbon content, the symbol of the main alloying element and the percentage of its content. The symbol of the auxiliary alloying element and the percentage of its content and the tensile strength composition. For example, FTG60-20, which refers to a powder metallurgy iron-based structural material with a combined carbon content of 0.4% to 0.7% and a tensile strength of 200 MPa; FTG60Cu3Mo-40, which represents a compound carbon content of 0.4% to 0.7%, and an alloying element content of Cu2% to 4%. A powder metallurgy iron-based structural material having a Mo 0.5% to 1.0% and a tensile strength of 400 MPa.https://www.supplyforever.com/

Accurate version of the outer ring clearance measurement formula for FAG bearings

The outer ring of the FAG bearing is measured for the clearance when the roller is in a sag state. First, ensure that the FAG bearing's straight posture rotates the outer ring 1/2-1 turn to the left and right, and any one of the two rows of roller rows is directly below. The clearance is measured with a feeler gauge, and the measured portion is somewhat different depending on the outer diameter of the outer ring of the INA bearing. The bearing clearance of the outer ring outer diameter greater than 200mm is measured by inserting the feeler gauge between the two rows of rollers and the outer ring directly above the FAG bearing and between the two rows of rollers and the inner ring at the left and right symmetrical positions of the bearing center. Internal clearance. The internal clearance r of the FAG bearing is: the internal clearance of the bearing between the two rows of rollers directly under the bearing and the outer ring is set to rS1`rS2, and the internal clearance above the bearing is set to rS.rS= 1/2 (rS1+rS2) The clearance between the inner bearing of the bearing measured between the two rows of rollers and the outer ring at the left and right symmetrical positions of the bearing center and between the two rows of rollers and the outer ring on the left side, Set rL1`rL2 separately, set the internal clearance of the left bearing to rL.rL=1/2(rL1+rL2) and set the clearance measured between the two rows of rollers on the right side and the outer ring. For R1`rR2, the internal clearance of the bearing on the right side is set to rR.rR=1/2 (R1+R2). The internal clearance of the bearing is obtained by the following equation. r = 1/2 (rS + rL + rR).

https://www.supplyforever.com/