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1、钣金工程图及加工基础（Sheet metal engineering drawing and processing basis）The first corner view method is adopted in China.The method of the first corner of the view is: main view, overlooking, left view, 01 January 20101. View readingWhat are the three views?The first corner view:View of the trigonometric tr
2、igonometry:Perspective of projection method:The method of projection onto a selected surface, which is projected onto the surface of the projectile, is called projectionThe third view is to see the plane of an object from the three directions of the difference, and then put the three planes into a g
3、raphic form, called three viewsThe formation of three viewsThe three-projective plane system consists of three vertical projective planes that comprise three projective planes, which are positive projective planes, horizontal projective planes, and side projecting projective planesPut objects in thr
4、ee plane system, according to the orthogonal projection method (parallel rays and the vertical plane of projection) separation to three surface projection, led by former backward on the orthographic projection was suffering from the view of main view, on the cast in a horizontal plane, called the ve
5、rtical downward from left to right on the side of the vertical plane of projection for developing view is called the left viewThe trigonometric view method is: main vision, front view, right visionNo matter which kind of way to accept, arguments are the same, to recognize three view drawing from thr
6、ee Angle to see a 3 d graphics, and is the requirement of knowledge map in mind should have a stereo view thinking2. What is the difference between domestic and foreign drawingsA. the orientation of view is not the same. (the first corner view is accepted in China.B. The position on a plane is not t
7、he same as shown in figure 1:The mainbeforeThe mainproneOn the leftrightA, bA domestic three view b foreign three viewsC. The size of the label is not the same. The foreign ocean is usually marked in coordinates, with a metric system or a British system of two sizes. The domestic acceptance of the d
8、irect standard system (the one inch = 25.4 mm)1. Knowledge map: (important point: long pair of positive, high level, and wide)Example 1: brick stereogram and three views at home and abroad2. Common English annotations on the drawingsThread ribCode/versionItem/revCopper platoonCooper is r(1)Section A
9、 - ASection A - AUnpainted areaFree of paint areaPartial view AThe Detail ABaking varnish protectionPainting masking4:1 ratioSCAL 4:1Material bringThe MaterialThe number ofQuantity (Qty.)Or the AmountMaterial thicknessThickness(abbr. T Hong Kong)noteRemarkunitThe UnitscrewscrewMetric system (interna
10、tional metric)Metric(2)Pressure riveting unscrewCaptive screwstudStandoffPressure riveting screwThe self - clinching studboltBoltRiveting nutThe self - clinching the nutscrewScrewRiveting studThe self - clinching standoffSurface handlingFinishRiveting nutThe anchor rivet bushThe lacquer that bakeCoa
11、t(or paint)Rising studThe anchor rivet boltPowder baking varnishPowder paintelectroplatingPlatingnutThe nutScreen printingSilkscreen(Or Pad print)The DescriptionDescription, nameScrew ScrewDevice AssemblesprayingOversprayVersion bringWire drawingRevisionThe Line grinding(Or: Brush)(3) the surface ar
12、e not allowed. The surface is not allowed to have a Scratch, a collision defect.(4) Remove all burrs and sharp edges, clean the oil pollution.(5) All the inside radius of the bent is R0.5 except special al declaration.(6) All the inside Angle of the bending is 90? Except for special special al decla
13、ration. No special indication that all bending angles are 90 degrees(7) The silkscreen should be clear, without burrs and sharp edges, and The dimension is accurate. The silk screen must be clear, without burrs, sharp corners, and The dimensions must be accurate.(8) The font of The silkscreen text i
14、s Arial type.(9) The color of The silkscreen is HUAWEI white.(10) The height of The silkscreen text is 3 mm, The wide of The silkscreen lines to be 0.3 mm3. Symbols commonly used in drawings1. Significance of surface roughness symbol:Is the surface available no matter whatThe surface can be used to
15、remove materialsThe method of surface removal of materials is obtained2. Feature items and symbols for tolerance tolerance?straightnessPosition degreesVertical scaleParallel scalePlane degreeDegree of symmetrygradientcylindricitya.roundnessLine profileDegree of circular shaftprofileThe relevant prac
16、tical common sense of plank1. Classification of steel plates (including strip steel) :1. Classification by thickness: (1) thin plate (2) medium plate (3) thick plate (4) heavy plate2. Classification according to production methods: (1) hot rolled steel plate (2) cold rolled steel plate3. Classificat
17、ion by surface characteristics: (1) galvanized sheet (hot galvanized sheet, electroplated zinc plate) (2) tin plate (3) composite steel plate (4) color coated steel plateFour, according to use classification: (1) the bridge plate (2) the economic steel plate (3) the shipbuilding steel plate armor pl
18、ate (4) (5) the car plate (6) roof steel plate (7) layout (8) electrical steel, silicon steel sheet (9) spring plate (10) the otherIi. Ordinary and mechanical layout of Japanese plate with steel plate1. The general layout Steel of Japanese Steel (JIS series) is made up of three main components: the
19、first department represents the material, such as: S (Steel) represents Steel, and F (Ferrum) indicates iron; The second division represents the appearance, category and use of the differences, such as the P (Plate) representation board, and the K (Kogu) means the tool; Third sector said characteris
20、tics of digital, generally for the minimum tensile strength, such as: SS400 - the first S Steel (Steel), the second S layout (Structure), 400 for the lower tensile strength of 400 MPa, tensile strength of 400 MPa group said the general layout of the SteelIi. SPHC - the first reduction of S for Steel
21、 Steel, P for Plate Plate reduction,H is the reduction of Heat Heat, the reduction of C trade Commercial, the group represents the general use of hot rolled steel and steel strip3. SPHD - indicating stamping steel plate and steel strip4. SPHE - indicates deep flush with hot rolled steel and steel st
22、ripBring 5, (SPCC), generally represented by Cold rolling quality carbon steel sheet and strip, the equivalent of China Q195-215 - a brand of the third letter C written for Cold Cold reduction to ensure tensile test, at the end of the brand and T for SPCCT6. SPCD - represents the cold-rolled high qu
23、ality carbon steel sheet and steel strip, equivalent to China 08AL (13237) high-quality carbon layout steel7. SPCE - represents the deep impact of cold rolled high quality carbon steel sheet and steel strip, equivalent to the Chinese 08AL (5213) deep steel needs to ensure the non-timeliness, at the
24、end of the plate is added N for SPCENCold rolled high quality carbon steel sheet and steel band quality code: the annealing status is A, the standard adjustment is S, 1/8 hard to be 8, 1/4 hard to 4 1/2 hard to 2, hard 1Surface processing code: matt finishing for D, shiny finishing for B (SPCC) - SD
25、 said standard conditioning, matt finishing of cold-rolled carbon is commonly used in sheet such as SPCCT again - SB said standard conditioning, brightness processing, guarantees of mechanical function of cold-rolled carbon sheets8. JIS mechanical layout is represented by steel plate number:S + carb
26、on content + letter codename (C, CK), carbon content in this medium is the central value x 100, the letter C: carbonK: it indicates that the carbon content of carburized steel is 0.18-0.23%Iii. Electroplating tin plate and hot galvanized sheet:One, tin plateTin plating steel sheet and strip, also kn
27、own as tin, tin plating on the surface of this kind of steel plate (with), has good corrosion resistance, non-toxic, can be used for packing material of canned, cable inside and outside to protect skin, telecom parts, flashlights and other hardware2. Hot galvanized sheetIn the thin steel plate and s
28、teel belt on the surface with the method of continuous hot dip plating zinc, can prevent corruption rust thin steel plate and steel belt surface of galvanized steel plate and steel belt is widely used in machinery, light industry, building, transportation, chemical industry, posts and telecommunicat
29、ions and other industriesIt is usually made of plateOne - galvanized steelGalvanized steel main if two types:1. Electroplated zinc plate (EG) 2, hot dip galvanized sheet (GI)Table 1: sheet of zinc plate and hot dip galvanized sheetmaterialcontentprojectElectroplating zinc plate(EG/SECC)Hot dip galva
30、nized sheet(GI)MemoParent metalCold rail annealed steel plateCold rail all hard steel plateBefore processingelectroplatingHot dipGalvanized quantityHard platingHard platingCoated surfaceZinc-thickness adsorption table steel; The surface is smooth without zincZinc - layered agglutination association,
31、 may have zinc or no zinc flowersCladding clubPure zinc platingThe outer layer is pure zinc, and the inner layer is ferrozinc alloyMechanical functionSame as motherboardAfter annealing, sometimes effective hardening; Material is qualitative softProcessing functionWith the parent material, the moldin
32、g machine can be goodCan suffer simple processing, complex processing cannot be able to hold completelyMaterial thicknessCommon materials are thick0.6 1.5 mmThe corrosion resistanceThin coating, poorCoating thickness, goodThe fingerprint coating can be addedThe priceyourhomemadeIi. Stainless steelAn
33、ti - corrosive acid steel, which is resistant to atmospheric, acid, alkali, salt and other mediaTo achieve non-rust corrosion resistance, chromium (Cr) is not less than 13%; This can be done in addition to nickel (Ni) or molybdenum (Mo), which can be used to increase the effect due to the variety of
34、 alloy products and contentFeatures of stainless steel: corrosion resistance, bright brightness,High strength; Its bound to be elastic; Extremely expensive3. SPTECommonly used sheet metal material. DocThe SPTE is low carbon steel tin (Sn) steel.Features: good fan and forming properties of low carbon
35、 steel; General material thickness shall not exceed 0.6mmUse: mask of magnetic interference and spare parts;Four. Spring steelCarbon steel contains manganese (Mn), chromium (Cr), silicon (Si), etc.Properties: the material can produce a large elastic variant, using elastic variant to absorb shock or
36、shock absorption, and can also store energy to make the machine complete the actionFive. Copper and copper alloysCharacteristics: conductive, heat transfer, good corrosion resistance, good gloss, easy processing, easy plating and coating1. Pure copper (with a high of 99.5%)It is also known as copper
37、, with low strength and good fan properties. Excellent conductivity, heat transfer and corrosion resistance; Used for power lines, cables, conductive equipment2. The brassThe mechanical function is related to the amount of zinc. Zinc in general is no more than 50%Features: ductility, good stamping,
38、used in electroplating, good resistance to seawater and atmospheric decay, but local corruption is prone to local corruption3. The bronzeA kind of copper - base alloy metalFeatures: better wear resistance than pure copper and brass: good processability and decay resistance4. The beryllium copperA co
39、pper alloy containing beryllium (Be);Features: high strength, hardness, elasticity and wear resistance; High conductivity, heat transfer and cold tolerance; No iron magneticUse: more electromagnetic shielding material;6. Aluminum (Al) and aluminum alloyCharacteristics: lighter metal materials; Good
40、corrosion resistance, conductivity and heat transfer; Under the same weight, Al conductivity is 2 times higher than Cu, but the pure aluminum strength and hardness are lowerUse: aluminum sheen and soft, can be made into the difference color and texture of the efficacy and corrosion materials:Seven.
41、Magnesium alloyFeatures: the lightest metal materials; Higher than strength, resistance, shock resistance, good fluidity, good anti-static mechanical and electrical energy; Corrosion resistance, easy to oxidize and burn5. Code description for hardwareStud type:1: EnglishModel and materials:SO steel,
42、 SOS stainless steel, SOA aluminum, this type of stud is a through-hole studBSO steel, BSOS stainless steel, BSOA aluminum, this type of stud is unthreadedThread specification:This is the English specification, which is available in 440,632,832,640,032Length code:The value here does not mean 8mm, it
43、 means to divide 1 inch into 32 units, 8 to 8 units, and to international metric system8/32 = 25.4 * 6.35 mm2: international metric systemModel and materials:SO steel, SOS stainless steel, SOA aluminum, this type of stud is a through-hole studBSO steel, BSOS stainless steel, BSOA aluminum, this type
44、 of stud is unthreadedThread specification:This is the international metric, which is available in M3, M3.5 M4, 3.5 M3 and so onLength code:The value here refers to 8mm, is the international metric unit, the unit is mmScrew nut1. EnglishModel and materialsS carbon steel, CLS stainless steel, CLA alu
45、minumThread specification:This is a British specification, which is available in 440, 632, 832, 10-32Length code:In this case, the value is not 2 mm, but said a cooperate with plank, 0 means plate thickness between 0.8 1.0 mm, 1 plate thickness between 1.0 1.2 mm, 2 said plank thickness at 1.5 mm (1
46、.5 mm) above2. International public systemInternational standard screwcap code, except for thread specification,Other code names are the same, and the common international metric thread specifications are M3, M3.5, M4, M5 and so onScrew type1. EnglishModel and materials:FH steel, FHS stainless steel, FHA aluminum, this type (FH) screw is the flat head screw, and it is pressed into the plateTFH steel