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introduction： one、Improve the coating ability of metal surface The coating phosphating film is porous，Uniform and fine，The paint seeped into the pores，Increase the adhesion of the coating。At the same time, the modified low zinc film can resist the corrosion of electrophoretic paint，Enhanced electrophoretic effect。All these are conducive to improving the phosphating film of the coating product+Corrosion resistance of organic coatings。The corrosion resistance of steel surface after phosphating is higher than that of direct coating without phosphating}2times。The effect of phosphating film on coating is as follows。 ①Provide interprocess protection，To avoid causing secondary rust。 ②Prevent chemical reactions between the coating and the substrate。 ③Mitigation of coating breakage，Rust in the paint
2015-01-23 Reading quantity 1455
introduction：Heat treatment residual force refers to the final residual stress of the workpiece after heat treatment,Shape of the workpiece,Both size and performance make a huge difference。When it exceeds the yield strength of the material,It causes the deformation of the workpiece,When the strength limit of the material is exceeded, the workpiece will crack,Thats the pernicious side of it,It should be reduced and eliminated。However, under certain conditions, the stress is controlled to make it reasonably distributed,The mechanical properties and service life of the parts can be improved,Turn harm into good。The stress distribution and change law of steel during heat treatment are analyzed,It is of profound practical significance to improve product quality to make it reasonably distributed。For example, about surface residual pressure
2015-01-23 Reading quantity 1451
introduction：one、Basic requirement （one）Provincial vocational skills appraisal guidance center according to the actual situation in the region，According to the characteristics of each unified examination occupation，Unified arrangement of time to organize implementation。 （two）Comprehensive review can be carried out in a variety of ways。Take paper writing、Candidates for oral or written defense，It shall be arranged by the provincial vocational skills appraisal guidance center，Submit my thesis and related materials。The provincial vocational skills appraisal guidance center organizes the comprehensive review committee to evaluate the content of the thesis before the defense，And according to the number of candidates to determine the defense schedule。 （three）Take other means to advance
2015-01-23 Reading quantity 2881
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。]Its a precision part.，Its use must also be carried out with corresponding care。No matter how high performance you useTIMKENbearing，If used improperly，You dont get the high performance you expect。The use of bearings should be noted as follows。 one、Keep bearings and their surroundings clean namely
2015-01-23 Reading quantity 1447
introduction：TIMKENbearing[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 rear axle drives an important part of the wheel movement。 TIMKENMain compounds in bearing operation，Can withstand bending and torque，At the same time absorb some of the impact load。Axle integral carbon alloy quenched steel and hardening after induction heating is commonly used in quenching，The depth of hardening layer is4
2015-01-23 Reading quantity 1457
introduction： We can use or draw a project drawing format file（It can also be a template,In the original，We still translate to format files），And apply it to the drawing file。Format is a custom layer of the drawing file，The format file contains the following contents：Title bar、border、table、It can even include the companys logo。To create a format file，Should beformatIn... mode，And need pro/detailmodule，We can choose the right drawing size（Standard drawing or custom size），To create a drawing format file，We should be sketchingSk
2015-01-23 Reading quantity 2878
introduction：SolidWorks2001The method of drawing and controlling spline curves<In the shape design of industrial products，In order to achieve good visual effects of the product，Spline curves are often used as sketches to build features。This article will give a preliminary introduction inSolidWorks2001 The method of drawing and controlling spline curves。 1． The drawing of spline curves A spline curve is formed by a smooth transition of a series of points，These points are called spline value points。SolidWorks2001 furnish
2015-01-23 Reading quantity 2900
introduction： Tap type and size according to the figure1Sum table1Regulation of...。 table1 Tap size(mm) designation Number of teeth (every25.4mm) Screw pitch P L l
2015-01-23 Reading quantity 2915
introduction：1、summarize A gas compressor is a power device that converts mechanical energy into gas pressure energy，Often used in pneumatic tools to provide gas power，In petrochemical、Drilling and production、Pressure oxygen is also commonly used in metallurgy and other industries、hydrogen、ammonia、Natural gas、Coke oven gas、Inert gas and other media。 Compressors can be divided into low pressure compressors according to different exhaust pressure—Exhaust pressure less than1.0MPa；Medium pressure compressor—Exhaust pressure1.0-10MPa；High pressure compressor—Exhaust pressure10-100MPa；Ultra-high pressure compressor—Exhaust pressure greater than100MPaAnd so on。The low pressure compressor is a single stage
2015-01-23 Reading quantity 2895
introduction：measureTIMKENbearing[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 outer ring value is the clearance when the roller is sagging。First guaranteeTIMKENThe right attitude of the bearing rotates the outer ring left and right1/2-1circle，2The position where any roller in a column is directly below each other。Use a gauge to measure the clearance，Measuring position according to bearing
2015-01-23 Reading quantity 1461
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