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introduction： [Content summary]In this paper, the source code of macro program of turning cycle is studied，A deeper understanding of the execution details of turning cycle instructions，The understanding of instruction parameters is improved，The method of determining coordinates for key points in programming is clearer，Some issues have been clarified。Some misconceptions have been corrected，So that we can better use the turning cycle instructions。 [keyword]macroprogram、order、sign、Cutting depth、coordinate In the teaching of numerical control programming，We generally prefer
2015-01-11 Reading quantity 2918
introduction：A rotary pump that relies on the change of working volume formed between the pump cylinder and two adjacent blades on the rotor when the eccentric rotor rotates to transport liquid or pressurize it(Sight-seeing pump)。Vane pump blades rely on centrifugal force（A spring or high pressure liquid can also be placed at the bottom of the blade）Stick to the inside surface of the pump cylinder，And in the rotor slot for reciprocating sliding(See picture[Slide pump diagram])。Rotor time，The working volume between two adjacent blades on the suction cavity side increases gradually,Pressure reduction,The liquid enters the working volume under the action of pressure difference。Working volume through a transition zone（Refers to the working volume is not connected with the suction cavity and the discharge cavity of the section）Taper off，And drain the liquid
2015-01-11 Reading quantity 2813
introduction： Smelting in metallurgical industry﹑Ingot casting﹑roll﹑Various machinery and equipment used in the handling and packaging process﹐Also known as metallurgical equipment。Metallurgical processes are complex﹐The corresponding metallurgical machinery is characterized by large structure﹑Large energy consumption﹑Production continuity﹑Strong complete set of equipment。Metallurgical machinery is mostly at high temperature﹑dusty﹑Continuous operation under heavy and corrosive conditions﹐Must meet﹑reliable﹑secure﹑Durability and energy saving requirements。The general development trend of metallurgical machinery is large-scale﹑serialization﹑High speed and automation﹔We also need some small ones
2015-01-11 Reading quantity 2842
introduction：story，Recently, there are so many customers consulting on Silver rail，All the time，The silver guide rail is in great demand in the market，Compared to other products in Taiwan，It debuted early，So the market share is still huge。
2015-01-11 Reading quantity 20023
introduction：Basic concept：Tool steel refers to the manufacture of cutting tools、Measuring tool、Die and resistance to high temperature softening spring、Bearing of all kinds[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 some wear parts such as steel。Usually divided into carbon tool steel、us
2015-01-11 Reading quantity 1462
introduction：Shandong Phoenix Pharmaceutical Co., LTD (Dongying City 257400) Xu Jingfang Sinopec pipeline storage and transportation company Dongying first station (Dongying City 257067) Li Changyin Shengli oilfield Tianfeng technology industry and trade limited liability company (Dongying City 257000) Zhang Baoling picks to：By simulating the actual welding test,The effect of spray welding layer on crack sensitivity of nickel base alloy was studied。The result shows that,The composition of nickel-base alloy spray welding layer has obvious influence on the crack sensitivity of austenitic stainless steel weld。The thicker the spray welding layer,That is, the more components of the spray welding layer melted in the weld,Weld gold
2015-01-11 Reading quantity 2889
introduction：In the electromagnetic mechanism，Attracted by a fixed electromagnet，And after the movement and the electromagnet to form a closed magnetic circuit，This moving ferromagnet is called“armature”，For example, the upper part of the common AC contactor drives the contact。 This principle is also used in brakes and clutches, as well as some electric mechanisms。 Small electromagnetic brakes have simple brake pads driven by the armature，Bigger brake and clutch，You have to use a suction cup。 Such armature finally constitutes a closed magnetic circuit，If its a bad closure，It will cause too much current in the electromagnetic coil，A short time is a noise，Too much time will burn the coil。
2015-01-11 Reading quantity 2824
introduction：A heat exchanger with a small diameter fluorine plastic hose as a heat transfer element，Also known as flexible tube heat exchanger。Commonly used fluoroplastics are polytetrafluoroethylene and polyperfluorinated ethylene propylene。1965The United States first applied this heat exchanger in industrial production。therewith，China、Japan and European countries also started manufacturing。Fluoroplastic heat exchangers are mainly used for working pressure（3～4）×10(Mr、 Operating temperature at200℃The following kinds of highly corrosive media for heat transfer,Such as sulfuric acid、Highly corrosive chloride solution、Cooling or heating of acetic acid and caustic media。 Structure The structure of this heat exchanger is shell-and-tube type
2015-01-11 Reading quantity 2803
introduction： Measurement of flatness errors in length measurement techniques。A plane is made up of straight lines﹐So straightness measurement in the rule method﹑Optical collimation﹑Optical autocollimation﹑The gravity method is also suitable for measuring flatness errors。When measuring flatness﹐First measure the straightness of some sections﹐Then the measurement values of each measuring point are defined according to the flatness tolerance zone(See form and position tolerance)The flatness error can be obtained by means of graphical or computational data processing。There are also use of light wave interference method and plate coloring method to measure the plane error。Light wave interference
2015-01-11 Reading quantity 2820
introduction：A pressure vessel in which the internal pressure is less than the external pressure。Vacuum containers and submersible shells for Marine development﹐All belong to this type of container。The failure mechanism of external pressure vessel is different from that of internal pressure vessel。Dangwai﹑The internal pressure difference reaches a certain value﹐The container will crumple due to loss of stability﹐This pressure difference is called the critical pressure for buckling。Different waveforms appear after the cylindrical vessel is unstable﹐The long cylinder presents two waves﹐The short cylinder will have more than two waveforms(See picture The waveform of the vessel after instability )。The critical pressure for instability depends on the elastic modulus of the material﹑Poissons ratio and the diameter of the cylinder﹑Length and wall thickness。Other parameters being equal
2015-01-11 Reading quantity 2906
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