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introduction： 1.Machining points of shaft diameter The shaft diameter is generally cylindrical，The requirements for surface roughness are relatively high，So the surface of the shaft diameter must be finely ground，Work in grinding（Shaft diameter）The rotation direction should be consistent with the rotation direction of the shaft diameter when it is actually working。If the surface roughness of the shaft diameter after fine grinding does not meet the requirements，Grinding or polishing is required。The material of the shaft diameter should have sufficient hardness after heat treatment，For grinding and polishing。 2.Processing points of bearing hole The bearing material is usually soft，The inner cylinder is not suitable for grinding，Boring can be used、Diamond boring、Scraping or grinding process。
2015-05-19 Reading quantity 1499
introduction：rollSKFbearing[SKFbearing:SKFThe full name is“Svenska Kullager-Fabriken”The Chinese transliterated name is“SKF”；SKFThe group is headquartered in Gothenburg, Sweden，Is a leader in bearing technology and manufacturing。SKFBearings can be divided into sliding according to different specific structures and similarities and differences in working propertiesSKFBearing and rollingSKFbearing]Its a precision part.，Its use must also be carried out with corresponding care。No matter how high performance bearings are used，If used improperly，You dont get the high performance you expect。Relate toSKFbearing[SKFbearing:SKFAll of
2015-05-19 Reading quantity 1524
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 2860
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 2996
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 2948
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 2842
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 3016
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 2966
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 2853
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 2942
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