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introduction： 1 probable above The system was originally designed for intelligent integrated monitoring system of temperature and humidity in grain warehouse，After parameter adjustment, it can also be used in other occasions。It consists of an upper computer and a lower computer。greater（The main）A surnamePCMachine or similar single chip microcomputer，hypostasis（from）The machine is a takeAT89C52As the core of the small measurement and control system。He picked them up separately4Road,（or8Road,）Temperature and humidity sensor，The temperature and humidity are detected。The lower machine is based on the average temperature and average humidity of each channel，Control the dehumidifier、Air conditioner or other facilities，So that the indoor temperature and humidity control within the set range，And show the average temperature in turn、wet
2015-01-29 Reading quantity 2807
introduction：Machine tools are used to process blanks or workpieces of metal or other materials，To obtain the desired geometry、Dimensional accuracy and surface quality of the machine。The parts of mechanical products are usually machined by machine tools。A machine tool is a machine that makes machines，It is also a machine that can make the machine itself，This is the main feature that distinguishes machine tools from other machines，Therefore, the machine tool is also called the working mother machine or tool machine。 Machine tools mainly include metal cutting machine tools，It is mainly used for metal cutting；Woodworking machine tool，It is used for cutting wood；Special machining machine，physically、Chemical and other methods to special the workpiece
2015-01-29 Reading quantity 2809
introduction：How to classify manual forklift trucks Manual forklifts are mainly used for high-lift handling and short-distance transportation，No sparks and electromagnetic fields are generated during use，Therefore, it is also suitable for automobile handling and workshop、Stash、quay、Stations and other relatively prohibited items、Loading, unloading and transportation of inflammable and explosive materials。 Electric hydraulic pallet truck：1.Electric walking，Hydraulic lifting；2.Light weight、Low body、Light handling、Have a broad vision；3.The frame design is robust，Strong bearing capacity；4.Make a smooth start，Electromagnetic braking of motor output shaft；5.Large capacity traction battery，Make sure you work long hours。
2015-01-29 Reading quantity 2828
introduction：1、Shaft and 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。]Selection and control of room tolerances FAGbearing[FAGbearing:The main shaft bearing is made of a solid inner ring、Outer ring、The ball、And a single row angular contact ball bearing consisting of a cage assembly with a solid window cage。]After pressing into the bearing, it should rotate flexibly without blocking。If there is a significant turn
2015-01-29 Reading quantity 1604
introduction： GB/T 12221-2005《Metal valve Structural length》rightGB/T 12221-1989andGB/T 15188.1~15188.4-1994Revision of standard，Replace these criteria。 The main changes in the revision of this standard are：The length of the structure is large，Including flange connection、Butt welded joint、Sandwich connection、Internal thread connection、The length of the structure of the connection mode such as external thread connection。Added welded end、double-clip、Internal thread、The basic length series of external thread structure and the structural length size of various valves，Center flange
2015-01-28 Reading quantity 2964
introduction：zhankaitu Developed view developing drawing A figure obtained when the surface of a spatial form is flattened on a plane，It is a content of the study of descriptive geometry。For parts made of sheet material，In addition to the need to use a multifaceted orthographic diagram to represent the shape of the part，Also use the development diagram to show the shape of the sheet before the part is made。Draw the expansion drawing according to the multifaceted orthographic drawing of the parts，Its essentially finding the true shape of the surface。The surfaces that make up the form can be divided into two categories：plane、Surfaces that can be flattened, such as cylinders and cones, are developable surfaces；A table that cannot be flattened, such as a sphere or a torus
2015-01-28 Reading quantity 2897
introduction：rongqishi guandao shusong zhuangzhi Container piping device capsule-tube transport system A pneumatic conveying device that uses the static pressure of air to press or suck a container containing material in a pipe。1861years，The post Office in London built the first practical line of container piping。thereafter，In Berlin、Paris、Cities such as Vienna and Munich have also built such conveying devices，For post office、bank、Hospitals and libraries carry mail、summons
2015-01-28 Reading quantity 2917
introduction： GB11164-89 Vacuum coating equipment General specification JB/T7439.1-94 Terminology of laboratory instruments Balance instrument JB/T7439.2-94 Terminology of laboratory instruments Dynamic testing instrument JB/T7439.3-94 Terminology of laboratory instruments Climatic environment test equipment JB/T7439.4-94 Terminology of laboratory instruments Noise measuring instrument JB/T7439.5-94 Terminology of laboratory instruments Vibration measuring instrument JB/T7439.6-94 real
2015-01-28 Reading quantity 2838
introduction： The mold industry has always applied new technology、New technology、A pioneer in new materials。In the last decade，The mold industry has beenCAD/CAMOne of the main users of the software。Some mold enterprises in Europe and the United States are widely usedCAD/CAM/CAETechnology and products，By contrast，Chinese mold manufacturers are entering the initial stage。 With conventional design procedures and processes，Designers are based on two-dimensional drawings or design specifications and geometric requirements，Transfer data、Parameter keying computer，passCAD/CAMSoftware program，The 3D model is generated first，And build on that，Programming numerical control
2015-01-28 Reading quantity 2925
introduction：Synthetic detergent，Commonly used are alkyl aryl sodium sulfonate and alkyl sodium sulfate。In the production process，With a lot of benzene、alkane、Chlorine gas as raw material。Chlorine should not be passed too quickly in production，Avoid excessive temperature，So that a large amount of reaction material volatilization sublimation and escape。Chlorine gas must first pass through the evaporator into the reactor。In general，Chlorine cylinders or tankers cannot be directly injected，To prevent chlorinated organic material from flowing back into the cylinder or tank car，Cause an explosion。Benzene is a grade I flammable liquid，Open flame should be strictly prohibited in the workshop，Electrical equipment shall be explosion-proof type。Benzene also tends to generate static electricity，The elimination of static electricity should be done。
2015-01-28 Reading quantity 2908
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