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introduction：one、Contact fatigue strength SKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]Under the action of cycle load，The contact surface is prone to fatigue damage，It cracks and flaks，This is the main form of bearing damage。therefore，In order to improve the service life of bearings，shaft
2015-03-08 Reading quantity 1466
introduction：There are many kinds of retarders。Commonly used gear and worm reducer according to its transmission and structural characteristics，It can be roughly divided into three categories： (1)Gear reducer mainly has cylindrical gear reducer、Bevel gear reducer and cone—Cylinder gear reducer three kinds。 (2)Worm reducer mainly has cylindrical worm reducer、Circular tooth worm reducer、Taper and worm reducer and worm—Gear reducer, etc。 (3)Planetary gear reducer mainly includes involute planetary gear reducer、Cycloidal pin wheel reducer and harmonic gear reducer, etc。 18.1The main type of commonly used reducer、Features and applications
2015-03-08 Reading quantity 2792
introduction： Manufactured by powder metallurgy method with certain dimensional accuracy and can withstand stretching﹑compress﹑Sintered parts that are twisted under loads such as twisting or operating under conditions of friction and wear﹐Also known as sintered structural parts。The main advantage of sintered structural parts is material saving﹑Save Labour﹐Low production cost﹐Suitable for mass production﹐Remarkable energy saving effect。Widely used in automobiles﹑Agricultural machinery﹑Sewing machine﹑camera﹑Power tools and other industries。The main difference between sintered structural parts and ordinary casting and forging materials is that their density is a variable。the
2015-03-08 Reading quantity 2791
introduction： Have two(Or one)A positive cylindrical or rectangular gauge for optical measurement of the plane。The optical measurement plane is a glass plane with very small surface roughness and flatness errors﹐It can produce light interference fringes(See laser length measurement technique)。There are two kinds of flat crystal and parallel flat crystal。Flat crystals are used to measure the flatness error of highly polished surfaces﹐figure1a Flat crystal test The flatness error of the measuring surface is measured by the flat crystal test measure block。The two optical measurement planes of a parallel flat crystal are parallel to each other﹐with
2015-03-08 Reading quantity 2795
introduction： The sound power level measurement method in this standard is equivalent to the international standardISO 3746-1979《acoustics—Measurement of sound power level of noise source—Rule of thumb》。 1、Main content and scope of application This standard specifies the noise measurement and evaluation methods of pumps。 This standard applies to submersible pumps、Various types of pumps other than reciprocating pumps and speed-regulating hydraulic couplings for pumps。The sound power level method should be preferred when applying this standard，Sound pressure level method is used only when conditions are not available。In case of dispute, the sound power level shall prevail。 2、Reference standard GB 3102.7
2015-03-08 Reading quantity 2892
introduction：With the progress and development of society，Mechanization is widely used in production and life。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。]As an indispensable part of the machinery，The scope of its use will also be more and more extensive，Because you need it anywhere you can turnKOYObearing[KOYObearing:kOYOBearing general requirements
2015-03-08 Reading quantity 1550
introduction： 1、 Low noiseNSKbearing[NSKbearing:Seiko Co., LTD（NSK LTD.）Be established in1916years，It is the first manufacturer to design and produce bearings in Japan。NSKThe function of the bearing fit is to makeNSKThe stationary ring and rotating ring of the bearing are respectively the stationary part of the installation part(Usually a bearing seat)And rotating part(Usually an axis)Solidify together，Thus, the basic tasks of transferring the load in the rotating state and defining the position of the moving system relative to the stationary system are realized。]The installation and adjustment can also emulate the long lifeNSKbearing
2015-03-08 Reading quantity 1467
introduction： Worm gear is a kind of mesh with the worm﹑Gear with special tooth shape。The cutting of worm gear teeth is generally completed by hobbing machine﹐There are two main methods of hobbing and cutting teeth with flying knives。When making precision worm gears﹐Shaving can be done after hobbing or cutting﹑Finishing process such as gear honing or grinding。 Gear hobbing Worm gear hob with the same basic parameters as the working worm﹐According to the principle of generative method(See gear machining)Cut out the teeth(figure1 Machining worm gear by rolling and cutting )。If the radial feed method is used
2015-03-08 Reading quantity 2821
introduction： hiwinLinear guide[hiwinLinear guide:hiwinrail，hiwinLinear guide]，It is a household name in the machine tool industry，This paper mainly introduces the specificationsHGW65HA7R12000ZBPIVInstallation of linear guide rail on gantry machining heart，Its from the horizontal direction4Root guide composition，The guide rail is lengthened to achieve the stroke and use required by the machine tool。On the whole，Master the installation method of the model guide rail，The corresponding guide rail installation of other specifications has been handy，And they did it really well。 one、Basic introduction
2015-03-08 Reading quantity 1770
introduction：Rolling 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 ferrule and the rolling body，Repeatedly subjected to high contact pressure on one side，One side makes rolling contact accompanied by sliding。retainer，One side with the ferrule and both sides of the rolling body，Or one of them sliding contact，One side withstands tension and compression。therefore，For bearing rings，Roller and cage
2015-03-08 Reading quantity 1552
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