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introduction：A component in a gasoline engine ignition system that periodically transmits high voltage to the spark plugs of each cylinder in accordance with the cylinder firing sequence(See picture distributor )。In the battery ignition system﹐The distributor and breaker are usually placed on the same axis﹐It is driven by a valve camshaft。It also has an ignition advance Angle adjustment device and a capacitor。The breaker arm closes the contact with a spring plate﹐Use the power off CAM to open the contact﹐The opening gap is approximately0.30～0.45millimeter。The number of bumps of the power off CAM is the same as the number of cylinders。When the contact is open﹐The distributor arm is aligned with the corresponding side electrode﹐The induced high voltage is generated by the secondary coil
2015-05-14 Reading quantity 2844
introduction：one、Logical fetch and output instructions 1．Instruction action LD（take）Start instruction for normally open contact logical operation，LDI（negation）Is the normally closed contact logical operation start instruction，OUT（exportation）For coil drive，The driving object has an output relay（Y）、Auxiliary relay（M）、Status relay（S）、timer（T）、counter（C）Etc.。OUTInstructions cannot be used for input relays，OUTInstruction driven timer（T）、counter（C）when，Must set constantKOr data register value。 2．Use example figure1Be due toLD、
2015-05-14 Reading quantity 2927
introduction：Mechanism analysis On the existing institutions in the structure﹑Movement and power 3Aspects of the analysis made。The purpose of mechanism analysis is to grasp the principle of mechanism composition﹑Athletic performance and dynamic performance﹐To rationalize the use of existing institutions and maximize their effectiveness﹐Or provide basis for verification and improvement of design。In classical institutional science﹐Generally, only structural and kinematic analyses are made﹐Dynamic analysis is performed only on high-speed or high-precision mechanisms。Corresponding to mechanism analysis is mechanism synthesis。 Structural analysis The purpose of the analysis is to understand the composition of the various institutions and their impact on the movement。The structure formula of the mechanism(That is, the mechanism freedom formula
2015-05-13 Reading quantity 2833
introduction： Stop valve The stem axis of the globe valve is perpendicular to the sealing surface of the valve seat。The stem opening or closing travel is relatively short，And has a very reliable cutting action，This makes the valve very suitable for use as a medium for cutting off or adjusting and throttling。Once the disc of the globe valve is open，There is no longer any contact between the seat and the disc sealing surface，And has a very reliable cutting action，The valve is very suitable for cutting off or adjusting and throttling the medium。 Once the stop valve is open，There is no longer any contact between the seat and the disc sealing surface，consequently
2015-05-13 Reading quantity 2903
introduction：AmericaSolidWorksThe company is a high-tech company specializing in the development of 3D mechanical design software，The purpose of the company is to enable every design engineer to use the latest powerful world on their own microcomputerCAD/CAE/CAM/PDMSystem，The companys leading products are the worlds leading levelSolidWorkssoftware。 90Early era，The international microcomputer market has undergone fundamental changes，The performance of microcomputer has been greatly improved，And prices are falling，The excellent performance of the microcomputer is sufficient to run 3DCADsoftware。In order to develop the world blank 3D based on microcomputer platformCADSystem
2015-05-13 Reading quantity 2919
introduction：Cutting with a rotary milling cutter as a tool。Milling is generally carried out on a milling or boring machine,Machinable surface、groove、Various forms(spline、Gear and thread)And the special shape surface of the mold and other milling features are：①The teeth of the milling cutter participate in intermittent cutting periodically；②The cutting thickness of each tool tooth during the cutting process is changed。figure1 [Several common milling methods]It is several common milling processing methods。 Cutting speed (meter／points)Is the circular speed of the milling cutter edge。Milling feed has3Type representation：①Feed per minute(millimeter/points)，Represents the position of the workpiece per minute with respect to the milling cutter
2015-05-13 Reading quantity 2806
introduction：Review and prospect of new electroplating process and technology We have entered the twenty-first century。Facing this new century，How does the plating industry respond？Its really getting late、Have you done nothing？To answer this question，It is necessary to review the new electroplating process and technology in the last century，At the same time, the future of electroplating technology in the new century is prospected。 Due to the application of new surface treatment technology and the reduction of the amount of ferrous metal materials in the product structure，The application of traditional electroplating technology is shrinking，In this sense, it is good that the electroplating industry is a sunset industry。But we can also see it，From the 1950s
2015-05-13 Reading quantity 2885
introduction：Carbide tool class Carbide indexable face milling cutter Kr75°Face milling cutter with shank Kr75°Heavy duty face milling cutter Kr75°Face milling cutter Kr90°Face milling cutter Special face milling cutter Step face milling cutter Kr75°Aluminum alloy face milling cutter Kr75-90°Face milling cutter with dense teeth Indexable end mill Three-sided blade。Two-edge milling cutter Carbide integral tool Solid straight shank twist drill Solid straight shank end mill Solid alloy keyway milling cutter Solid ball end mill Solid straight shank reamer Solid alloy round rod Integral small bore boring tool entirety
2015-05-13 Reading quantity 2804
introduction：one、Check pixel、Input diagnosis 1.Check pixel Usually occurs in the input entity，usableSolidWorksCheck the geometry or enter a diagnostic tool，Detect any abnormal geometric relationships before building the grid。If invalid edges and surfaces are found，Or have too short a line，The grid cannot be successfully built。 As shown in the figure1As indicated，Instruction by checking pixels，It is found that the model shares6A side error with4A short sideline。 2.sp;
2015-05-13 Reading quantity 2815
introduction： Rupture is the main failure form of stamping forming，Fall intoαrupture、βRupture and bending rupture。 Although the bottom of the drawing piece is cracked，The same as the rupture of expansion partsαrupture，But the swelling rupture always appears in the deformation zone of the billet，However, the deep drawing fracture occurs in the force transfer zone，therefore，Sheet metal drawing and expansion when matchingαThe resistance to rupture is different。The limit deformation degree of drawing(Such as drawing coefficient)，Limited by the bearing capacity of the billet transfer zone；The ultimate degree of swelling deformation(Such as swelling depth)，Depends on the plasticity of the material。
2015-05-13 Reading quantity 2826
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