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introduction：Contact fatigue failure refers to angular contact ball bearings[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。]The working surface is subjected to alternating stress and produces failure。Contact fatigue spalling occurs inFAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact consisting of a cage assembly with a solid window cage
2014-12-24 Reading quantity 1451
introduction：Power supply characteristics of electric forklift advantage；Three-phase AC motor is the main component of AC drive system，Its working principle is to transfer three-phase alternating current to the stator winding，Gyromagnetic field generation，Induction of the closed rotor winding，To generate an electric current，The rotor rotates in the direction of rotation of the rotating magnetic field under the action of the electromagnetic force。This approach has two obvious advantages: first，The most prominent advantage of AC motors is the absence of carbon brushes，There is also no limit to the maximum current that DC motors usually have，This means that the motor can get more energy and larger system in practical use
2014-12-24 Reading quantity 2799
introduction：Applicable model： 1、 Face milling and center hole drilling machine：Z8210，Z8220A，ZBT8216。 2、 Car end hit the main hole machine tool：80B。 3、 Counterfacing machine for center holes：91116。 4、 Center hole drilling machine：K1 1 2，K382-16，K382-9001。 Conscientiously implement《General operating rules for metal cutting machine tools》Relevant provisions。
2014-12-24 Reading quantity 2799
introduction： 1、Mechanism of ultra-fine grinding Ultra-fine grinding is achieved by using the grinding wheel working surface to trim a large number of equal height abrasive micro-edges。These equi-height abrasive micro-edges can remove small margins with microscopic defects and microscopic dimensional shape errors from the workpiece surface，Therefore, high grinding accuracy can be obtained，In addition，Due to the existence of a large number of micro-blades with uniform abrasive particles，Under the premise of appropriate grinding amount，Can leave a large number of very fine cutting marks on the machined surface，Thus, a very low surface roughness value is obtained。Because there is obvious friction in the non-spark polishing stage、Slip extrusion、Polishing and calender action，Therefore, the surface roughness can be made
2014-12-24 Reading quantity 1468
introduction：How to maintain electric forklift truck Electric forklifts require good protection，You basically have to protect your car after a week，The general protection is very particular，Protection methods can be as follows： （1）Insist on the cleanliness of the repair site。 （2）Repair time，Dont bring anything slack or valuable with you。 Pay attention to！ Repairing the electrical system of the electric forklift，If the metal comes into contact with energized electronic components, it can cause short circuit or combustion。therefore，Please take off your watch.、Earrings or other accessories。
2014-12-24 Reading quantity 2878
introduction： Causes of flash edges 1Die parting surface(PL)The sliding surfaces do not match。 2Injection pressure too high 3The offset of the injection machine 4Insufficient locking force Related knowledge 1Parting surface of the moldPL，Sliding mating surfaces，Knockout pin，Pad etc.。The gap between the various grooves of the mold is formed，If the flow of materials becomes a flash。The flash is shaped like a wedge。It tends to get bigger。 2The elimination of the flash of the product is generally based on the principle of repairing the mold，Due to poor setting of forming conditions
2014-12-24 Reading quantity 2854
introduction：What are the main characteristics of planetary cycloidal pin gear reducer，The application of planetary cycloidal pinwheel reducer in production is very common,This indicates the importance of planetary cycloidal pin gear reducer. 1:The scope of use of planetary cycloidal pin gear reducer:Cycloidal pinwheel reducer is based on the principle of planetary transmission with small tooth difference,A mechanism by which cycloidal needle teeth engage to achieve deceleration,Machine bedroom,Vertical type,Biaxial and direct connection and other assembly methods,Is metallurgy,mine,unit,Chemical engineering,spin,Preferred equipment for light industry and other industries. 2: The main characteristics of the planetary cycloidal pinwheel reducer:
2014-12-24 Reading quantity 2805
introduction：Edm is a kind of special precision machining technology，It has developed rapidly in recent years。Especially slow wire cutting，It has become an indispensable processing means for mold manufacturing and metal processing industries。The development of wire cutting technology，It is inseparable from the synchronous development of electrode wire technology。Because the cutting efficiency and cutting quality of the wire cutting machine are closely related to the performance of the electrode wire，The breakthrough of electrode wire technology often leads to the innovation of wire cutting machine design。from1979Galvanized electrode wire was invented to this day，A variety of electrode wires with better performance than ordinary brass wires are constantly appearing on the market，The correct selection of electrode wires has been made
2014-12-24 Reading quantity 2788
introduction： 1．Beam spindle 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。]Precautions for installation and commissioning （1）Single beam 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 are on the shaft
2014-12-24 Reading quantity 1521
introduction： In recent years，In the context of tight international energy supply，China has increased investment in the field of new energy represented by wind energy，The output of new energy will gradually increase，But over a long period of time，Chinas coal-based energy structure will continue。Compare open pit mining with underground mining，Have high productivity，Low accident rate，Easy equipment maintenance and other objective advantages。Both nationally and internationally, Vigorously develop open-pit mining is a general trend。As one of the important equipment necessary for open-pit mining production, mine trucks will also usher in a very bright future with the vigorous development of open-pit mines。 TIMKEN
2014-12-24 Reading quantity 1447
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