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introduction：one、sketch Over the years，Programmable controller（Hereinafter referred to asPLC）From its creation to the present，It realizes the leap from wiring logic to storage logic；Its function is from weak to strong，The progress from logical control to digital control is realized；Its application field has grown from small to large，The simple control of single equipment to competent motion control is realized、Process control and distributed control and other tasks span。TodaysPLCIn dealing with analog quantities、Numerical operation、All aspects of human interface and network capability have been greatly improved，Become the mainstream control equipment in the field of industrial control，It plays an increasingly important role in all walks of life。 two、
2015-03-05 Reading quantity 2803
introduction：In this paper, the problem of tool selection in the process planning of mold cavity is systematically studied，The rough machining of mold cavity is put forward、semi-finishing、The principle and method of selecting the finishing tool，The corresponding implementation algorithm is constructed，coexistenceUG/OPENAPIThe preliminary programming is implemented under the environment，Have developedCATSPrototype system。 introduction There are two key problems in NC machining: the generation of tool path and the selection of tool。The previous problem was in the past20It has been extensively and deeply studied in this year，Many of the algorithms developed are already commercially availableCAD/CAMIt is applied in the system。Most of the presentCAMSystem energy
2015-03-05 Reading quantity 2815
introduction： Usually the flat forging machine has some working characteristics of the hot die forging press，That is, the static pressure at work，And it is borne by the frame itself；The slider must travel；Have good guide device, etc。 The reason why such devices can be applied and developed，Is because it also has the following working characteristics： 1)There are two parting surfaces； 2)The main slider is moving horizontally； 3)Positioning device with blank。 Due to the above working characteristics of the flat forging machine，Its die forging process and die design will have the following characteristics： 1)can
2015-03-05 Reading quantity 2822
introduction：Power over Ethernet（PoweroverEthernet，PoE）Design for wired Ethernet LAN、Applications and long-term availability bring many benefits，cost、flexibility、Even security is enhanced。It overcomes the limitations that system designers often encounter——Why do they have to put electrical network equipment and AC outlets together。 Have itPoE，Data and power are referred to as security48VThe direct current is transmitted on the same Ethernet cable。If the network device can be configured as48Vprofessional，In that way，Network devices supply AC power that is inherently insecure——Through a
2015-03-05 Reading quantity 2925
introduction： one、Structure and working principle of reciprocating pump Main component：Pump cylinder、piston，Piston rod and suction valve、Discharge valve。 Working principle：As the piston moves from left to right，Negative pressure is formed in the pump cylinder，The liquid in the storage tank enters the pump cylinder through the suction valve。When the piston moves from right to left，The liquid in the cylinder is squeezed，Pressure build-up，Discharge by discharge valve。 Reciprocating piston，Each inhales and expels liquid once，Called a work cycle；This type of pump is called a single acting pump。 If the piston goes back and forth once，Inhale and expel fluids twice，
2015-03-05 Reading quantity 2955
introduction： one、When installing the reducer，Special attention should be paid to the alignment of the transmission center axis，The alignment error can not be higher than the compensation amount of the coupling used in the reducer。After centering the reducer as required，It can obtain more ideal transmission effect and longer service life。 two、There are many types of couplings used in the reducer，However, it is best not to use the rigid fixed coupling，Mainly because the installation of this type of coupling is more difficult，If the installation is not good, it will increase the load，Easy bearing[bearing:bearing（“Bearing”，Japanese person
2015-03-05 Reading quantity 2852
introduction： 1.General requirement 1.1 Valve specifications and categories，Shall comply with the requirements of the pipeline design document。 1.2 The valve model should indicate the national standard number requirements based on。If enterprise standard，The relevant description of the model should be indicated。 1.3 Valve operating pressure，demand≥The working pressure of the pipe，Without affecting the price，The working pressure that the valve can withstand should be greater than the actual working pressure of the pipeline；Either side of the valve closed should be able to withstand1.1Double the valve working pressure value without leakage；With the valve open，The valve body should be able to withstand a double valve
2015-03-05 Reading quantity 2823
introduction：Milling cutter with spiral bevel gear is roughed by extension method﹑Gear machine for finishing the teeth of spiral bevel gears and hypoid gears。Spiral bevel gear milling machine is widely used in machine manufacturing﹐Especially in cars﹑Tractors are used most in the industry。Machining diameter as small as10millimeter﹐As large as2500millimeter。Processing accuracy is generally7level(JB180-60)﹐Some are reachable6level。Spiral bevel gear milling machine(See picture Spiral bevel gear milling machine)The main shaft of the milling cutter is mounted in an eccentric drum﹐Used to adjust the position of the center of the milling cutter。The eccentric drum wheel is installed in the shaking table﹐And with the shaking table(With a milling cutter)Swing at an Angle﹐with
2015-03-05 Reading quantity 2806
introduction：1）、KOYOImported bearing[Imported bearing:Simply put, the import bearing agent refers to the sale of an imported bearing brand。The main brands of imported bearings arenskbearing，ikobearing，fagbearing，Of good quality，Of course, the price is not cheap。]From the beginning of use guide the first material fatigue phenomenon of this period of time is and bearing speed，Size of load，It matters how clean the lubrication is。 2）、Fatigue is the result of the shear stress under the load surface appearing periodically，After a period of time，These shear stresses cause tiny fractures in the skull，And then gradually extend to the surface，When the rolling piece passes by
2015-03-05 Reading quantity 1472
introduction： For those of you who have a car，Proper use of the clutch is important，Proper use of the clutch can extend the life of the clutch，So what is the correct way to use the clutch?Fengye mall electromagnetic clutch to introduce you。 First of all, dont just randomly step on the clutch。The clutch on the car is in normal running，Its in a tight bond，The clutch should not slip。In addition to the car start when driving、Shifting and low-speed braking require pressing the clutch pedal outside，Dont step on the clutch the rest of the time，Or put your foot on the clutch pedal。 in
2015-03-05 Reading quantity 2910
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