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introduction： A composite type of wear caused by small amplitude vibration between compressed metal surfaces。In vibrating machinery，Threaded joint、Spline joints and interference fit joints are prone to fretting wear。It is generally believed that，The mechanism of fretting wear is：The normal pressure between the friction surfaces causes the micro-convex surfaces to stick。The bonding points are cut off by small amplitude vibration to become abrasive chips，The debris is then oxidized。The oxidized abrasive particles act as abrasive particles in the wear process，Pitting or worm-like scars on a rubbing surface。These marks or scars are the source of stress concentration，Therefore, it is also the source of the failure of parts under dynamic load。By oxygen
2015-01-26 Reading quantity 2817
introduction：We therefore monitor continuouslyINAbearing[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。]Temperature is necessary，Whether measuring the bearing itself or other important parts。If the operating conditions are the same，Any change in temperature can indicate that a fault has occurred。The bearing temperature can be measured periodically by means of a thermometer，For example, digital temperature
2015-01-26 Reading quantity 1571
introduction： A thin layer of metal is removed from the machined hole wall using a reamer﹐For precise aperture and geometry as well as low surface roughness machining。Reamer is usually drilled﹑After reaming or boring﹐For machining precision cylindrical and cone holes﹐The machining aperture range is generally3～100millimeter。Because the cutting edge of the reamer is long﹐Each cutter tooth participates in cutting at the same time when reaming﹐High production efficiency﹐It is widely used in the finishing of holes。 The working mode of reaming is generally the workpiece does not move﹐Rotate by the reamer and towards the hole
2015-01-26 Reading quantity 2817
introduction：The high temperature thickener thickens the composite oil，And add multi-effect additives，It is a high-quality grease that maintains normal working condition in a high temperature environment for a long time。 A High temperature resistance and high speed shear resistance，So that it can cope with high temperature and high speed environment。 B Excellent resistance to high and low temperatures、lubricity,Good colloidal stability and mechanical stability。 C The operating temperature range is－40~230℃，Short time to250℃。 DIt is suitable for mechanical use where noise reduction is required or the use environment is extremely harsh,Also suitable for high temperature parts lubrication。 E Strong water resistance，It can withstand water
2015-01-26 Reading quantity 1467
introduction： age hardening Age hardening ageing Aging treatment air hardening Gas hardening air patenting Air toughening annealing anneal anode effect Anode effect anodizing anodizing atomloy treatment The surface of Atomoloi austempering Austenite isothermal quenching austenite The Austenite/austenite bain
2015-01-26 Reading quantity 2824
introduction：20150126Price list With the increasingly frequent technical exchanges at home and abroad，Many foreign technical drawings and technical information into our enterprises，But there is a difference between the metric and the inch in every country in the world，It brings difficulties and obstacles to work，Which countries in the mechanical use of a variety of threads，Is one of the examples，The methods of identifying and transforming some threads commonly used abroad are provided。 1 Identification of inch unified thread Inch unified thread，It is widely used in inch countries，This type of thread is divided into three series：Coarse teeth seriesUNC，fine
2015-01-26 Reading quantity 2911
introduction：Planetary gear reducer is a wide range of products，It is indispensable in almost every field of the national economy。This product is widely used in metallurgy、mine、overweight、 transport、cement、unit、Chemical engineering、spin、Printing and dyeing、pharmacy、Food environmental protection and other industries are suitable for gear circumference speed is not great12m/sInput speed is not very dry 1500r/min.The operating environment temperature is-40℃-45℃Transmission machinery of;It can be operated in two directions。 NGWThe series reducer is an involute straight planetary gear reducer。Advanced technology and novel structure，Mainly used in metallurgy、mine、cement、since
2015-01-26 Reading quantity 2817
introduction： 1）Classification of hydraulic fluids According to the requirements of use：antiwear、hypocoagulability、Flame resistance、Peace and quiet、antisilver、Numerical control、Hydraulic transmission oil, etc。 Score by performance：Mineral oil and synthetic oil。 According to the working principle：Liquid pressure can be used for liquid transmission and liquid kinetic energy for hydraulic transmission。 2） Advantages and disadvantages of hydraulic system Hydraulic system oil classification、specification、Quality requirements and precautions。 HLOrdinary hydraulic oil HMAnti-wear hydraulic oil HGHydraulic guide oil
2015-01-26 Reading quantity 1561
introduction：http://www.hljjsj.cn Hard gear reducer use and maintenance precautions：1、Press before starting to check whether the oil level in the reducer meets the requirements。Open or change the ventilation cap as prompted to allow smooth ventilation，And check whether the rotation is flexible。 2、Before the load test, it should run for about half an hour without load，After confirming that no load is faulty, the force can be loaded and run。Test runs should be checked frequently：No abnormal shocks，Vibration，impermeable、Oil leakage。The temperature rise shall not exceed60℃，The maximum oil temperature shall not exceed100℃(Daily work should also be checked)All is well for a regular job
2015-01-26 Reading quantity 2895
introduction： Modification of the surface of the workpiece using flexible polishing tools and abrasive particles or other polishing media(See machining)。Polishing can not improve the dimensional accuracy or geometric shape accuracy of the workpiece﹐Instead, the goal is to get a smooth surface or mirror-like finish﹐Sometimes used to remove gloss(extinction)。Usually a polishing wheel is used as a polishing tool。Polishing wheels generally use multiple layers of canvas﹑Made of laminated felt or leather﹐Both sides are clamped with round metal plates﹐The rim of the wheel is coated with a polishing agent composed of a uniform mixture of micro-powder abrasive and grease。Polishing time﹐High speed rotating polishing wheel(Circular velocity20meter/Seconds or more)Pressed work﹐Make the abrasives right
2015-01-26 Reading quantity 2814
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