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introduction：(one)．Types of annealing 1． Full annealing and isothermal annealing Full annealing followed by weight crystallization annealing，Generally referred to as annealing，This annealing is mainly used for the casting of various carbon steel and alloy steel with hypoeutectoid composition，Forgings and hot rolled profiles，It is also sometimes used for welding structures。It is often used as the final heat treatment of some unimportant workpieces，Or as a pre-heat treatment for certain workpieces。 2． Spheroidizing annealing Spheroidizing annealing is mainly used for over-eutectoid carbon steel and alloy tool steel（Such as making cutting tools，Measuring tool，The type of steel used in the mold）。Its main purpose is to reduce hardness，Improve machinability
2015-06-22 Reading quantity 1643
introduction： 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。]From within、Outer race、Rolling element（ball、Roller or needle roller）And retainer consists of four parts，Except for the retainer，The rest is made up of bearing steel。When the bearing is working，in-bearing、Outer race，Bearing roller
2015-06-22 Reading quantity 1618
introduction： Main use This machine is suitable for pharmaceutical、Chemical engineering、Food and other industries，It is a new generation of crushing equipment integrating crushing and vacuuming。 Working principle This machine is hammer type high speed crusher，The material enters the crushing chamber from the hopper through the screw conveyor rod，Smashed to pieces by a spinning hammer，pulverize，The crushed material is subjected to the action of rotating centrifugal force，Automatic access to the bag，The dust is filtered by the vacuum box through the cloth bag and recovered。press“GMP”Standard design，All made of stainless steel，No dust flying in the production process。At present, it has reached the international advanced level。And can improve the utilization of materials
2015-06-22 Reading quantity 2870
introduction： The use of electromagnetic brakes 1、Check for wear and dirt；Check the mechanical wear of moving parts regularly，And remove the dust on the surface of the electromagnet parts、Flower hair and dirt。 2、oiling；Lubricant is often added to the moving part of the electromagnetic brake。 3、Check armature stroke length；Check the length of armature stroke regularly。Because during the operation of the brake，Due to abrasion of the split surface，The travel length of the armature will increase。When the armature stroke length does not reach the normal value，Adjustments must be made
2015-06-22 Reading quantity 2977
introduction：Computer cooling fan，Fan 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。]The reliability of the system determines the service life of the cooling fan and its noise and stability。Classified according to fan bearings，There are generally two types of air-cooled radiators：Oil bearing fans and ball bearing fans。Oil bearing is cheap though，But the oil bearing is sliding friction
2015-06-22 Reading quantity 1589
introduction：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。]Washer Chinese and English contrast and interpretation 1.Shaft ringshaftwasher Bearing washer mounted on shaft。 2.racehousing&n
2015-06-22 Reading quantity 1630
introduction：According to the law of supply and demand to determine the economic and reasonable material storage in the process of production and circulation management work inventory management should play a buffer role,Make the logistics balanced and smooth，Both to ensure normal production and supply，And can reasonably compress the stock of funds，In order to get better economic results。 1915years，ColumbianF.W.Harris published models of economic order sizes，Pioneered the study of modern inventory theory。Before this，ItalianV.Pareto proposed Paretos law when he studied the distribution of wealth in the world,For inventory managementABCClassification method。With the scientific management work，Inventory management
2015-06-22 Reading quantity 2867
introduction：1、carbon（C）：The carbon content in steel increases，Yield point and tensile strength increase，But plasticity and impact are reduced，Equivalent carbon0.23％overtime，The weldability of the steel deteriorates，Therefore, low alloy structural steel for welding，Carbon content generally does not exceed0.20％。High carbon content will also reduce the resistance of steel to atmospheric corrosion，High carbon steel is susceptible to corrosion in an open yard；In addition，Carbon can increase the cold brittleness and aging sensitivity of steel。 2、silicon（Si）：Silicon is added as a reducing agent and deoxidation in the steelmaking process
2015-06-21 Reading quantity 1712
introduction：FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]The noise inside the hard disk is mainly from the movement of different motor components，And from this can be the form of rotating wind noise，subdivision，Magnetic failure of the motor、Bearing column、Bearings and discs are the source of noise，So that there is no big difference for ball bearings。 Despite the lubricant，And the inner wall of the ball and bearing is also smooth．But they are always in contact，High speed operation makes the ball shaft
2015-06-21 Reading quantity 1657
introduction：The heaviest bronzes of the late Shang Dynasty in China，1939It was unearthed in Anyang, Henan Province,Overall height133centimetre,long166centimetre，heavy875kilogram。The shape is dignified,ornamentation(See color diagram[Simu Wu Square Ding──Bronze castings from the late Shang Dynasty,heavy875kilogram（Unearthed from Anyang, Henan Province)]），It shows the production capacity and technical level of the bronze smelting industry in Yin and Shang dynasties，It has important historical value。According to scholars，The tripod is made of pottery，Tripod body（Including the hollow Cauldron）Injection casting。Cast from the abdomen、Top norm、The core and the base and the gate are composed，The tripod ear is cast after。The chemical composition of tripod is:copper84.77%，tin11
2015-06-21 Reading quantity 2930
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