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introduction： PCBInspection specification for visual inspection one, Line section: 1, disconnection, A, There is a break or discontinuity in the line, B, The length of the broken line on the line exceeds10mm,Beyond repair. C, Break pointPADOr near the edge of the hole,(Break stationPADOr edge is less than or equal to2mmrepairable.Disconnect at the breakPADOr hole edge greater than2mm,Beyond repair,) D, Parallel disconnections of adjacent lines cannot be maintained. E, The line gap breaks at the bend,(The distance from the bottom of the break to the turn is less than or equal to2mm,repairable.The break is at the bend
2015-03-11 Reading quantity 2868
introduction： 181 GB/T 16721-1996 Industrial automation system Manufacturing message specification Protocol subset specification Industrial automation systems--Specification of subsets of the protocol for the manufacturing--Message specification 182 GB/T 16722.1-1996 Technical product documentation Computer aided technology
2015-03-11 Reading quantity 2790
introduction：Use the reference geometry in the sketch to help constrain complex shapes。You can create and constrain reference curves to locate circles and isolated centers，Decide on composite angles or develop useful construction geometry for your sketched geometry。The reference geometry is not selected when the sketch is selected，As in stretching。 case∶As shown in the figure9As indicated，In order to create a hexagonal sketch，You can use a reference circle(A circle converted to the reference geometry) Unconstrain hexagonal vertices and apply equal length constraints to hexagonal edges (This will automatically define equal correct angular shapes) 。Constrains an edge to be horizontal (Dont let the hexagon rotate) ，For decision VI
2015-03-11 Reading quantity 2904
introduction：1.Flow measurement method Flow measurement methods can be roughly summarized into the following categories： (1)Using the Bernoulli equation principle，Differential pressure flow measurement method that reflects the flow rate by measuring the differential pressure signal of the fluid； (2)Velocity flow measurement method by directly measuring the flow rate of the fluid to obtain the flow rate； (3)Volumetric measurement using a standard small volume to continuously measure flow； (4)Mass flow measurement method for the purpose of measuring the mass flow of fluid。 2.Classification of flow meters 3.
2015-03-11 Reading quantity 2909
introduction： 1、Opposite thrust ball 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。]Life effect SKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden
2015-03-11 Reading quantity 1474
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。]Fatigue failure is a surface form of failure，The main manifestation is the initiation of fatigue cracks，Expansion and fracture processes，The long-term effects of failure of the metal under alternating loads。Sealed thrust tapered roller bearings are lubricated with specially tested, high-quality lithium based greases。this
2015-03-11 Reading quantity 1435
introduction： At present，With the continuous development and application of mold industry。And the requirements of products on molds continue to improve，More and more high-end precision molds are put into use，In the process of continuous use of molds，There will inevitably be damage to the mold，Such as wear、scratch、pinhole、Defects such as cracks and defects。Traditional repair equipment to a certain extent，Help customers repair molds to save costs。But there are inevitable problems，If the mold is deformed after repair、Hardness reduction、Internal stress、trachoma、Damage or even abandonment。The companys products precision mold repair cold welding machine，It uses high-frequency electrical fire
2015-03-11 Reading quantity 2772
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。]Spin at high speed、Especially when the speed is close to or exceeds the limit speed recorded in the size table，The main points should be noted as follows： （1）Use precision bearings； （2）Analysis of bearing internal clearance（Consider the reduction of internal bearing clearance caused by temperature rise）；
2015-03-11 Reading quantity 1519
introduction：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。]It is the assembly that supports the rotation of the shaft。Its rings and rolling elements are precision machined。Angular contact ball bearing before factory，In order to protect the raceway and rolling surface from corrosion，The anti-rust oil or anti-rust grease is injected between the raceway and the rolling body。Therefore, the bearing should be cleaned before installation。Bearings sealed with anti-rust oil can be cleaned directly with gasoline or kerosene；Antirust with thick oil or antirust grease，Light mineral oil must be used first，Such as10#machine
2015-03-11 Reading quantity 1540
introduction： The other day，National reducer Standardization Committee(Hereinafter referred to as “National bid Reduction Committee”)Hold an extended meeting，The national bid Reduction Committee was discussed and adopted“The 12th Five-Year Plan”Work plan，explicit“The 12th Five-Year Plan”Planning outline：Effectively implement the national economy“The 12th Five-Year Plan”Outline of the development plan and targets for the development and revitalization of Chinas equipment manufacturing industry，Strive to improve the standardization management level of the national reducer enterprises and even the whole industry，Make domestic transmission equipment to meet the development needs of Chinas key and major equipment manufacturing industry in modern national economic construction，For our equipment manufacturing industry
2015-03-11 Reading quantity 2852
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