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introduction： Content summary:8baked Charge temperature(℃)70-8070-9080-100110-12080-10060-7580-8570-80100-105time(H)1-24-61-28-123-522-341Barrel temperature（℃）Anterior segment170-200170-190200-220240-285180-190170-190180-200-210-240midpiece-165-180180-200230-280170-1 plastic
2014-12-31 Reading quantity 2934
introduction：Content summary：CAD/CAMThe system already plays an important role in many ways，This paper combines Wafangdian 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。]Development practice of tooling management system in joint-stock company，The general structure of the system and the entry of the tooling list are emphasized、search、edit、printout、Version management、corpuscle
2014-12-31 Reading quantity 1597
introduction：（one）Influence of surface characteristics 1、cleanliness：The metal surface adsorbs a pollution layer and oxide film with low cohesive strength and low surface energy，This will reduce the bonding strength。generally，When the metal surface is clean，Exposure is minimal or even zero。Contact changes with time after material treatment，It is easily polluted by ambient atmosphere in the air，Elevation of contact Angle，about5HThe rear contact Angle tends to stabilize。 Contact Angle and bonding strength before and after surface treatment metal
2014-12-31 Reading quantity 2921
introduction：The lathe fixture is used to determine the correct position of the workpiece on the lathe，And clamp the workpiece，It plays a very important role in the turning process。Commonly used lathe clips have： 1)Universal fixture。Such as three jaw chuck、Four jaw chuck and various forms of thimble, etc。 2)Adjustable fixture。Such as a group of fixtures、Combination fixture。 3)Special fixture。A fixture actually used to meet a certain process of a workpiece，Such as rotating tool holder。 In production，To ensure product quality、Improve production efficiency、Reduce labor intensity，The fixture should be selected and used correctly。 The function of lathe fixture 1．Improve machining accuracy、Guaranteed property
2014-12-31 Reading quantity 1574
introduction：In useTIMKENbearing[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 process of，Grease is very critical。if，Stale grease was used，Not only is it ineffective，And it will be damagedTIMKENbearing。 ① Oil flow observation method Take two measuring cups，One of them contains lubricating oil to be checked
2014-12-31 Reading quantity 1560
introduction：The quality of anti-rust materials directly affects the quality of product processing，So when choosing rust-proof materials，Firstly, the physical and chemical properties are tested according to the quality requirements，After passing the test, the pilot test will be conducted，Meet the process requirements to use in large quantities。Select the rust prevention auxiliary material to use，After entering the factory, according to the quality standards of different materials, strict testing，It can be issued by the supply department for use only after it is qualified。In the process of use, the anti-rust materials and the prepared solution are tested regularly，To ensure that the concentration and proportion of the solution meet the process requirements，Achieve serviceability。Establish a complete material acceptance system and quality acceptance standards，In order to do a good job of anti-rust management
2014-12-31 Reading quantity 1759
introduction：UGThe software has a variety of rounding methods for users to choose according to the actual use，amongFace BlendIs a feature that is used more frequently，There are several options in this feature，The user can use it to complete the face to face，Equal radius between groups of faces、Variable radius and so on。itsBlend Type （Circular type）There are four options：Sphere, Conic, Disc, Isoparameter。We knowSphereThe algorithm of the circular type is to simulate the surface formed by the trajectory of a ball rolling from surface to surface，As follows
2014-12-31 Reading quantity 2836
introduction：The car trembled at the start，combine“Clara，Clara”The voice of，The noise is more pronounced when the speed changes。This phenomenon is the sound of the cars universal-joint and spline loosening。This phenomenon occurs when the vehicle is traveling at high speed and at low throttle，Sound enhancement，Severe jitter。 The reasons for the loose sound of the universal joint and spline of the transmission shaft are as follows： (1)Chronic oil deficiency，Universal-joint cross shaft and roller wear loose，The roller broke。 (2)Drive shaft spline tooth groove and drive shaft fork spline wear loose。 (3)Transmission output shaft spline worn loose。
2014-12-31 Reading quantity 2950
introduction：(1)General requirements for cage materials 1)It has low hardness and high wear resistance，Although the hardness of the material is higher wear resistance，However, if a high hardness material is used as a cage，Will wear the rolling element，The rotation performance is adversely affected，Even produce“Convergent phenomenon”。 2)Because the cage is subjected to repeated tensile and compressive stresses，Therefore, it requires a high fatigue strength；Have the necessary elasticity and toughness；Resistance to centrifugal force。 3)Cage light weight，Use less dense materials，So thatKOYOBearing friction loss is small，It can ease the impact of rolling element entering and leaving load zone。 4)Plastic machining and cutting
2014-12-31 Reading quantity 1493
introduction： To measure the resistance of material under shear force﹐It is one of the basic test methods for mechanical properties test of materials。It is mainly used to test parts and materials subjected to shear loads﹐Such as rivets on boilers and Bridges﹑Pins on the machine, etc。The shear test was carried out on a universal test machine﹐The sample is placed on the shear fixture﹐There are two kinds of loading modes: single shear and double shear(See picture Shear test loading diagram )﹐Sample under shear loadP The action is cut off。Simple shear time﹐P Divided by the cross-sectional area of the specimenA ﹐Derived shear
2014-12-31 Reading quantity 2838
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