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introduction： The criteria for judging vary according to mechanical properties and importance, as well as inspection cycles。If any of the following injuries， KOYObearing[KOYObearing:kOYOBearings are generally required to bear large loads，Often without a cage，Instead, fill the inner and outer raceways with rolling elements。And most small and medium-sizedKOYORolling bearings are equipped with retainers。 inKOYOBearing in the processing process，The outer ring of the bearing、Inner ring、How do the roller and cage fit together。]Not to be reused，Must be replaced。 In the process of using bearings，Grease is very critical。if
2015-06-30 Reading quantity 1622
introduction：In the process of use due to its own quality and external conditions，Its carrying capacity，The rotation accuracy and anti-friction energy performance will change，When powder metallurgy bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]When the performance indicator is lower than the usage requirements and cannot work properly，Be known asINABearing damaged or invalid，Bearing in case of damage
2015-06-30 Reading quantity 1717
introduction： Abstract：CAD/CAMisCIMSThe core of，Feature-based product modeling is the implementationCAD/CAMKey to integration，This paper analyzes the typicalCIMSFunctional model of engineering design subsystem，giveCIMSUnder the circumstanceCAD/CAMProduct feature model。 keyword：trait Product information model CAD/CAM 1.IMSIntegrate product models withCAD/CAMFeature-based product model
2015-06-30 Reading quantity 2924
introduction： Priority is given to bearings produced to low noise standards[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。Can also be said，When other parts move relative to each other on the shaft，A device used to reduce the coefficient of friction during power transmission and to keep the center of the shaft fixed。]。In the use of thrust ball bearings，Some machines have specific requirements for noise，For example, to be made to low noise standards：Eight roller bearings，Model number fromN309atypiaN322type；Three kinds of ball bearings，Their insides
2015-06-30 Reading quantity 1884
introduction： With precision coordinate positioning device﹐A grinding machine for grinding precision holes and forming surfaces where hole spacing accuracy is required。Coordinate grinding machine and coordinate boring machine have the same structure layout﹐The difference is that the boring tool spindle is replaced by a high-speed grinding head。When grinding﹐The workpiece is fixed on a work table that can be moved according to coordinate positioning﹐In addition to high-speed rotation, the grinding wheel also makes slow rotation through the planetary transmission mechanism﹐And can make vertical feed motion(Sighting machine)。Change the radius of planetary motion of the grinding head﹐Radial feed is possible。The grinding head is usually a high-frequency electric grinding head or an air through flat grinding head。The coordinate grinder can grind cylindrical holes in addition﹐It can also grind the inner and outer surfaces of circulars and circles
2015-06-30 Reading quantity 2938
introduction：（1）Quenching color（EXP） White is the hardest and brittle，Yellow is hard and tough，Blue is soft and tough。 （2） Quenching medium A water：Generally, the temperature does not exceed40The degree of，No oil，Impurities such as soap。 B An aqueous solution of salt and alkali：Water plus percent5~10Salt or alkali。 Salt solutions cool ten times faster than water，High and uniform hardness，But the tissue stress is great，It has a certain rusting effect。Temperature less than60Degree oil-free bearing[bearing:bearing（“Bearing”，Japanese person“Axial receptor”）It is a part that holds and reduces the friction coefficient of load during mechanical transmission。
2015-06-30 Reading quantity 1599
introduction： Standard number Standard Chinese name Standard English name SY/T5525-92 Rotary drilling equipment Upper and lower kelly cock valves GB/T12240-1989 tong
2015-06-30 Reading quantity 3014
introduction：The process of cutting the bar to the required length before forging。There are two main methods of cutting and forging equipment。 Cutting saw blade、Saw blade、Saw band、Thin slice grinding wheel and turning tool cut the forging blank。The cutting end face is flat，But the incision consumes material，Low productivity，More for variety、Forging billets with small batch size or high notch quality requirements。 The cutting of forging equipment has shear、Snap off、Cut with a knife after heating。figure1 [Shear blanking principle]The principle of cutting material。The shape of the knife edge is similar to that of the bar section。Small size bar material
2015-06-30 Reading quantity 2984
introduction： The process of cutting the bar to the required length before forging。There are two main methods of cutting and forging equipment。 Cutting out Saw blade﹑Saw blade﹑Saw band﹑Thin slice grinding wheel and turning tool cut the forging blank。The cutting end face is flat﹐But the incision consumes material﹐Low productivity﹐More for variety﹑Forging billets with small batch size or high notch quality requirements。 Blanking of forging equipment Have shear﹑Snap off﹑Cut with a knife after heating。figure1 Shear blanking principle The principle of cutting material。Knife shape and bar cut
2015-06-30 Reading quantity 2942
introduction：After placing a detail view on the diagram，You can move the view position and change its scope without having to rebuild the view。 To change the size of the detail view∶ As shown in the figure10-1, 10-2As indicated 1. SelectDrawing->Define View Boundary； 2. Be sure ofLabel on Parent ViewTrigger toOn； 3. Click once on the superview or detail view； 4. Drag the shape circle to the desired position and click on the position； 5. Select
2015-06-29 Reading quantity 2947
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