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introduction：Numerical control manual programming methods and steps The main contents of NC programming are：Analyze part drawings to determine the process、Numerical calculation、Write processor、Proofreading procedure and first piece trial cut。 The specific steps of programming are described below： 1．Analytical pattern、Determine the process Machining parts on CNC machine tools，The original data that the technician gets is the part drawing。According to part drawing，Can be on the shape of the part、Dimensional accuracy、Surface roughness、Work material、The blank types and heat treatment conditions were analyzed，Then select the machine tool、cutter，Determine the positioning clamping device、Processing method、Finish well
2015-04-16 Reading quantity 2897
introduction： mastercamPractical technical course4 2． SelectBoundariesSet up the workpiece blank。See picture9-7Dialog box。 （1） passStockItem sets the blank size of the workpiece。SelectParameters→Take from 2 pointSet the bottom left corner of the blank to（-100，-310），The upper right corner point is（100,10），Generate dashed lines as shown9-8Blank shown。 （2） passTailstockParameters of tailstock center。 （3） passChuckSetup card
2015-04-16 Reading quantity 2915
introduction： Basic equations of fluid dynamics： Change the quality﹑The law of conservation of momentum and energy is used to correlate fluid velocities obtained from fluid motion﹑stress﹑The relationship between physical quantities such as density and temperature。The basic equations of fluid dynamics can be established for both the system and the control body。A system is a combination of fixed substances﹔The control body is a fixed volume of space relative to a certain coordinate system﹐Its boundary surface is called the control surface。Most of the basic equations discussed in fluid dynamics are established for control bodies。The basic equation has two forms: integral and differential。The former is obtained by integrating the control body and the control surface between the physical quantities of the fluid
2015-04-16 Reading quantity 2907
introduction：Under difficult circumstances，Traditional methods of lubrication are not available。This babbitt impregnation provides excellent wear resistance and enhanced lubrication of bearings[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。]And thrust gaskets flooded and dry environments。Operating temperature up to177C ，These materials are suitable for underwater use，Low viscosity liquid，Such as water and fuel。
2015-04-16 Reading quantity 1554
introduction：INAbearing[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。]Produces noise during operation，There are two common types of scar noise and dust noise，How to solve the noise generated by thrust ball bearing in operation？The main thing is to find the cause of the noise first，Then according to different reasons to take different methods to reduce bearing noise。The following bearings are in operation
2015-04-16 Reading quantity 1562
introduction：1、 Low noiseSKFbearing[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]The installation and adjustment can also emulate the long lifeSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is
2015-04-16 Reading quantity 1540
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。]Model number External dimension Rated load
2015-04-16 Reading quantity 1464
introduction：Mechanical seals are precision、One of the more complex mechanical base elements，Is a variety of pumps、Reaction synthesis still、Turbine compressor、Submersible motor and other key components of equipment。Its sealing performance and service life depend on many factors，Such as selection、Accuracy of machine、Correct installation and use。 one、Selection method Mechanical seals vary according to working conditions and the nature of the medium，High temperature resistance、Low temperature mechanical seal，High pressure resistance、Corrosion-resistant mechanical seal，Mechanical seals resistant to granular media and mechanical seals adapted to light hydrocarbon media that are easy to vaporize，Different structural types and materials should be selected according to different uses
2015-04-16 Reading quantity 1562
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。]Causes of fever and its elimination The reason of rolling bearing heating and its elimination method (1)reason:Low bearing accuracy method:Select bearings with specified accuracy grades。 (2)reason:Spindle bent or box hole different heart method:Repair the spindle or housing。
2015-04-16 Reading quantity 1547
introduction： How to remove rust from electric forklift parts 1、Rust removal of aluminum and aluminum alloys。The formula of the repair agent used：Chromic anhydride80G（g）、water1L（l）、Phosphoric acid200mL（milliliter）；temperature：15C~30C；Processing time：5min~10min；After scaling:Cold water rinse，Then rinse with hot water。 2、Mechanical rust removal。Usually a wire brush is used、scraper、Emery cloth and other tools。This method is easy to leave scratches on the working surface，Suitable only for non-essential parts surfaces； 3、
2015-04-16 Reading quantity 2927
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