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introduction：An analytical instrument for measuring the concentration of hydrogen ions in solution using the potential principle。pHMeter has a wide range of applications，It is indispensable in all production processes and scientific experiments that need to monitor the pH of solutions，Especially in the chemical industry、The petroleum and metallurgical sectors are particularly widely used。“pH”Is a symbol，It represents the concentration of hydrogen ions in a solution。The relationship between it and hydrogen ion concentration is pH＝-log［H(］Shizhong［H(］Its a molar concentration(M)Is the unit of hydrogen ion concentration if［H(］＝10(M，thepH=7，Neutral solution。［H(］＞10(M，thepH＜7，Acid solution
2015-05-19 Reading quantity 2856
introduction：Applicable model： 1、Thread milling machine：S6110，SB6110，Y620（563B），J620，Y68（5M5Б62），J68，S6125， 5Б62，561。 2、Thread machine：KT38A，SB8918，CFI。 Conscientiously implement《General operating rules for metal cutting machine tools》Relevant provisions。
2015-05-19 Reading quantity 2990
introduction：In the adhesive industry，Foreign adhesives are widely used，The variety of products is wide and complete，Serialized products are large in quantity，And there is a growing trend。And Chinas adhesive output in1999It ranks third in the world，But the output value only accounts for the worlds adhesives7％，And high performance、High value-added products are not only few but also of low quality，monovarietal，Far behind developed countries。Because Chinas adhesive market is vast，Some large foreign adhesive production companies have also transferred to the domestic market。 one、The status quo and existing problems of quality inspection of domestic adhesive products 1．Adhesive industry small and medium-sized enterprises，Quality control equipment
2015-05-19 Reading quantity 2943
introduction：161：What is the arrangement of rivets based on？ a：Determined on the basis of the strength of the connector。 162：What are the adverse effects of riveting defects？ a：Will weaken the riveting strength。 163：What kind of joint is the composite corner joint generally used for？ a；For the connection of square tubes。 164：When riveting, the size of the rivet diameter and the distance between the rivet centers are determined according to what？ a：According to the stress of the structural parts and the required strength。 165：Why should we avoid hammering too many times when cold riveting by hand？ a：Too many hammering times will produce material
2015-05-19 Reading quantity 2837
introduction：cardan shaft Universal coupling companion flangePaired flange Coupling flange Matching flange screw screw packing list Packing list hydraulic hydraulic roller pressHydraulic press bearing Movable 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，with
2015-05-19 Reading quantity 3010
introduction： 51：What is carbon arc gouging？ a：The metal is partially melted by the high temperature of the carbon arc，At the same time, the molten metal is blown away by a stream of compressed air，To achieve the purpose of planing or cutting metal， 52：What is the use of grinding？ a：It can eliminate the burr on the edge of the weld scar，Polish the welds and the welds of the pressure vessel before re-inspection。 53：What is bend forming？ a：Put the slab blank，Profile or pipe，Bend at an Angle，curvature，To form a certain shape of the parts。 54：a：What do you mean bounce back
2015-05-19 Reading quantity 2959
introduction： Using a combination of photographic reproduction and chemical etching﹐Precision on the surface of the workpiece﹑Chemical processing methods for fine and complex thin layer graphics。The lithography principle is still in19It has been known since the beginning of the century﹐However, it has not been used for a long time because of the lack of excellent photoresist。until20century50age﹐Kodak photoresist made in the United States with high resolution and excellent corrosion resistance(KPR)later﹐Lithography technology developed rapidly﹐And began to use in the semiconductor industry。Lithography is the manufacture of advanced semiconductor devices and large
2015-05-19 Reading quantity 2849
introduction：Preparation of molding sand The material used to make sand is called molding material，The material used to make sand is conventionally called molding sand，The molding material used to make the sand core is called core sand。Usually molded sand is made from raw sand（Mountain sand or river sand）、Clay and water in proportion Blend into，Where the clay is about9％，The water is about6％，The rest is raw sand。Sometimes a small amount such as pulverized coal is added、Vegetable oil、Wood chips and other additives to improve the performance of molding sand and core sand。The structure of compacted sand is shown in the figure2-2As indicated。 figure2-2 Sand structure diagram 1—Sand grain 2—
2015-05-19 Reading quantity 2937
introduction：Reduce the high speed running clutch 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。]Noise method,High speed bearings are mostlyIKObearing[IKObearing:IKONeedle roller bearing with its special internal structure to achieve the mechanical design of small、Light weight。Guideway bearings are based on the high quality given by needle roller bearings，Made with unique mechanical equipment
2015-05-19 Reading quantity 1607
introduction： peculiarity： Collection spray drying/Fluidization granulation in one，One step granulation of liquid material is realized。 spray，Especially suitable for micro-excipients，Heat sensitive material，Power ratioFLHigh boiling granulator1~2Speed。 The final moisture of the product can be reached0.1%，Equipped with powder return device，Granulation rate≥95%，Can be produced0.2－2mm。 The improved design of the internal mixing multi-fluid atomizer can handle the specific gravity of the extract up to1.3g/cm3。 principle： A certain powder material is put into the fluidized bed as a crystal seed，The liquid material is pumped to the nozzle atomizer。The first
2015-05-19 Reading quantity 2859
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