角形軸承座的工藝和鏜φ180孔夾具設(shè)計(jì)【角形軸承箱】

喜歡就充值下載吧。資源目錄里展示的全都有，下載后全都有,請(qǐng)放心下載，.dwg格式文件為原稿CAD圖紙，可自行編輯修改【QQ：1304139763 可咨詢交流】=喜歡就充值下載吧。資源目錄里展示的全都有，下載后全都有,請(qǐng)放心下載，.dwg格式文件為原稿CAD圖紙，可自行編輯修改【QQ：1304139763 可咨詢交流】=喜歡就充值下載吧。資源目錄里展示的全都有，下載后全都有,請(qǐng)放心下載，.dwg格式文件為原稿CAD圖紙，可自行編輯修改【QQ：1304139763 可咨詢交流】= Course Project :Manufacturing Technology DesignTitle Design of special fixture for coarse and fine boring of bearing block_Student Name _CHICK ARTHUR NICK FUSI_ Class Mechanical Design 、Engineering and Automation (English)151_ Student No. _201535510132_Department/College _ Engineering Institute_Advisor Dr. Wang_ Date _2018 年 11 月 07日_ II Course Project: Manufacturing Technology Design Design Instruction on Course Project:Manufacturing Technology DesignDesign Assignment Title：Design of special fixture for coarse and fine boring of bearing block1) Manufacturing process planning sheet12) Assembly drawing of Fixture or jig1 3) Detail drawing 1 / part4) Design Instruction1 5) Assembly animation1 Course Project: Manufacturing Technology Design ContentsContents3Abstract4Chapter 1 Part Analysis51.1 Part role51.2 Process Analysis of Parts5Chapter 2 Process Design62.1 Determination of the manufacturing form of the blank62.2 Datum selection62.3 Formulating the route62.5 Determine the cutting amount and basic working hours82.5.1 Thick and fine milling front and rear end faces of 25082.5.2 coarse and fine boring 180H7102.5.3 drilling reaming 25122.5.4 Milling groove 10mm142.5.5 drilling expansion 6-1314Chapter 3 Fixture Design173.1 Proposal of the problem173.2 Selection of positioning criteria173.3 Analysis of positioning error18Operation List Sheet22Conclusion24References25Thanks26 AbstractThe mechanical manufacturing process curriculum is designed after completing all the basic courses, professional basic courses and most of the main courses of the university. This is an in-depth and comprehensive review of the courses that students have taken before graduation design. It is also a theoretical and practical training. Therefore, the design of mechanical manufacturing technology courses is very important.I hope that I can adapt the mechanical manufacturing process design through this course design, from which I can get exercise, and consciously analyze the problem and solve the problem, and lay a good foundation for future work.Due to limited capacity, there are many deficiencies in the design process, so please ask the teachers to enlighten me.Key words: process planning, design, special fixtureChapter 1 Part Analysis1.1 Part roleThe bearing housing parts are generally the components that connect the bearings. Of course, if there are connecting bearings, there will be shaft holes, and the central shaft hole will have high precision. The center hole is connected with the corresponding shaft and bearing. The center hole of the bearing housing this time. It is connected with the bearing on the corresponding shaft. The center hole of the bearing connection needs to have a certain surface precision, and the cylindricity and other geometrical tolerance requirements must be ensured. Therefore, the bearing seat can ensure the rotation of the transmission shaft smoothly. The role.1.2 Process Analysis of PartsSome of the surfaces to be machined in this housing part mainly include a wide groove on the upper end surface and the upper end surface, a wide groove on the lower right side end surface and the lower right side end surface, and a lower end surface on the upper wide groove opposite side, The opposite end faces of the wide groove on the right side, the front and rear end faces of 250, etc., the surface roughness of the front and rear end faces of 250 in these surface features is Ra6.3, and the width of 50h11 of the two parts is also Ra6.3, and the others are The specified surface roughness requirements are Ra12.5, and the surface roughness is not indicated.The characteristics of the hole include a large circular hole 180H7 on the center reference, the surface roughness of the hole is required to be Ra1.6, and the surface roughness of the 2-25 hole on the upper wide groove and the lower right wide groove is required to be Ra12.5, on the large end face. The 6-13 through hole requirement is also Ra12.5.The geometrical tolerance requires 0.12mm between the upper middle end and the lower right end. The center large round hole 180 requires a roundness of 0.008mm, the large end surface 250 is the reference B, and the center large round hole 180 is the reference C. The two wide slots are relative to The B-reference has a positionality of 0.4 mm, and the front and rear large end faces have a verticality of 0.1 mm with respect to the C-reference center.Chapter 2 Process Design2.1 Determination of the manufacturing form of the blankThe material of the bearing housing is HT200. The material is gray cast iron. The material of gray cast iron is usually made in the form of casting. This part is of course also used in the form of casting. The casting adopts the common sand type. The way of casting is fine.2.2 Datum selection(1) Rough reference selectionThe basic rough reference of this bearing housing part can select the shape of the workpiece. At the beginning, the front and rear end faces of the 250 large outer circle are used as the rough reference for processing the front and rear end faces. Of course, the upper end face and the lower right end face of the part can also be used as a rough reference.(2) fine benchmark selectionIf the precision of the bearing housing parts is selected, the center hole is used as the subsequent fine reference. For example, the machining of the small hole and the wide groove can be used as the subsequent machining precision reference.2.3 Formulating the routeFor this time, the two parts of the process plan are determined and compared. as follows(1) Process plan oneProcess 1: Casting blankProcess 2: rough and finish milling 250 front end faceProcess 3: After roughing and finishing 250, the end face is guaranteed to have a size of 100mm.Process 4: coarse and fine center hole 180H7 in placeStep 5: Milling the upper end face and the right end faceStep 6: Milling upper lower end surface and right lower end surface to ensure size 50mmStep 7: Milling the upper end and the right end of the wide groove 50mmProcess 8: Drilling and expanding 2-25 holesProcess 9: Drill 6-13 holeProcess 10: Deburring chamferingProcess 11: Inspection and storage(2) Process plan 2Process 1: Casting blanksStep 2: Thick and fine center hole to 180H7Process 3: coarse and fine milling 250 front and rear end faces to ensure thickness dimension 100mmStep 4: Milling the end face and the right end faceStep 5: The lower end surface and the lower right end surface corresponding to the upper part of the milling machine are guaranteed to have a size of 50 mm.Step 6: Wide groove 50mm on the upper and right end faces of the millingStep 7: Drilling and expanding 2-25 holesProcess 8: 6-13 hole on the large end faceStep 9: Deburring the chamferProcess 10: Inspection into the warehouse(3) Comparative analysis of process plansLet us analyze the comparative analysis of the two process schemes for the parts of the housing as above.In the second scheme, the large hole is processed first, and then the front and back end faces and the remaining surface features are processed. This obviously violates the basic principle of the front face back hole, so it is not used, so this processing plan selection The first processing solution.2.4 Determination of machining allowance, process size and blank sizeAccording to the material blank of the bearing seat, the HT200 gray cast iron blank is used to determine the machining allowance, process size and blank size of each machined surface.1, front and rear end faces of 250For the plane machining allowance of Table 2-24 of the Guidelines for the Design of Mechanical Manufacturing Technology Basic Courses, the surface roughness of the planes of the front and rear end faces of the bearing housing 250 is Ra6.3, which must be completed after roughing and semi-finishing. The thickness range is 50100mm. It is known that the roughing allowance is 1.7mm on one side and the semi-finishing allowance is 1.3mm on one side. Thus, the blank size of the front and rear end faces of 250 is 100+3+3=106 mm.2, hole ( )Query Table 2-20 The diameter of the hole 180 of the bearing housing before the roughing can be 170mm at the maximum. This time, it is manufactured according to the blank size of 170 hole.2.5 Determine the cutting amount and basic working hours 2.5.1 Thick and fine milling front and rear end faces of 250(1) rough millingMaterial to be processed: HT200Machine tool selection: vertical milling machine X53KTool selection: Select sleeve end mill, diameter 100mm, number of teeth is Z=10Milling depth : Feed per tooth : According to Table 5-5 of “Guidelines for the Design of Mechanical Manufacturing Technology Basic Courses”Milling speed : refer to Table 5-11 of Machinery Manufacturing Technology Basic Course Design GuideMachine tool spindle speed : Feed rate : Feed per minute of the workbench: According to the basic time calculation of milling in Table 5-47 of the Machinery Manufacturing Technology Basic Course Design Guide, this is the sleeve face milling cutter. The basic working hour calculation formula of milling is as followsIn the middle Milling length of the workpiece Tool cut length :In the middle For the nominal width of the milling, look up Table 5-11 to find that the face milling cutter with a milling width of 100 mm has a milling width of 48 mm. : Milling cutter diameter is 100mmSubstituting the above formula,inferred Cut length of the cutter : Take , select 3mm this time : Workbench horizontal feed The number of passes is 1Mobility time (2) Finishing 250 end faceMaterial to be processed: HT200Machine tool selection: vertical milling machine X53KTool selection: Select sleeve end mill, diameter 100mm, number of teeth is Z=10Milling depth :Feed per tooth : According to Table 5-5 of “Guidelines for the Design of Mechanical Manufacturing Technology Basic Courses”Milling speed: refer to Table 5-11 of Machinery Manufacturing Technology Basic Course Design GuideMachine tool spindle speed :Feed rate : Feed per minute of the workbench:According to the basic time calculation of milling in Table 5-47 of the Machinery Manufacturing Technology Basic Course Design Guide, this is the sleeve face milling cutter. The basic working hour calculation formula of milling is as followsIn the middleMilling length of the work piece Tool cut length :In the middle For the nominal width of the milling, look up Table 5-11 to find that the face milling cutter with a milling width of 100 mm has a milling width of 48 mm. : Milling cutter diameter is 100mmSubstituting the above formula ,inferred Cut length of the cutter : Take , select 3mm this time : Workbench horizontal feedThe number of passes is 1Mobility time2.5.2 coarse and fine boring 180H7(1) Rough hole to 179Choose high speed steel fileThe roughing tool is selected as For the feed amount query, refer to Table 5-36 of the Mechanical Engineering Technology Basic Course Design Guide.The cutting speed is shown in Table 5-1. Machine tool spindle speed :The cutting time is calculated according to the following formulaIn the middleL: The length of the cutting is 179mm according to the aperture: The actual length of the workpiece is 179mm: roughing selection is 2mmLeading angle , then , this time select 4mmThe number of feeds is (2) fineChoose high speed steel fileFor the feed amount query, refer to Table 5-1 of the Machine Manufacturing Technology Basic Course Design Guide.The cutting speed is shown in Table 5-1, Machine tool spindle speed :The cutting time is calculated according to the following formulaIn the middleL: the length of the cutting is 180mm according to the aperture: The actual length of the workpiece is 180mmLeading angle , then , this time select 4mmThe number of feeds is 2.5.3 drilling reaming 25(1) Drilling to 20Feed rate : According to Table 5-22 of Machine Manufacturing Technology Basic Course Design GuideCutting speed: refer to Table 5-22 of Technical Manufacturing Technology Basic Course Design GuideMachine tool spindle speed : ,The cutting time of the drilling hole is calculated as followsIn the middleLength of the layer to be cut: this time according to the depth of the cutting Tool cut length : The front angle of the taper shank twist drill is generally 118 degrees. This time is calculated according to 120 degrees.Tool cutting length : , this time is drilling through hole, according to 3mmThe number of passes is 1Maneuver time : (2) Reaming to 25Feed amount : According to Table 5-25 of Machine Manufacturing Technology Basic Course Design GuideCutting speed: Refer to Table 5-26 of the Guidelines for the Design of Mechanical Manufacturing Technology Basic Courses.Machine tool spindle speed : ,The cutting time of the reaming is calculated as followsIn the middleLength of the layer to be cut : this time according to the depth of the cutting Tool cut length : : The front angle of the taper shank twist drill is generally 118 degrees. This time is calculated according to 120 degrees.Tool cutting length : , this time is drilling through hole, according to 3mmThe number of passes is 1Maneuver time :2.5.4 Milling groove 10mmMachine tool: Milling machine X53KTool: high speed steel keyway milling cutter Number of teeth Feed amount : According to Table 5-15 of Machine Manufacturing Technology Basic Course Design GuideCutting speed : refer to Table 5-15 of Machine Manufacturing Technology Basic Course Design GuideMachine tool spindle speed : ,The method of milling the keyway is used to calculate the basic working hour calculation formula of milling as followsIn the middleCutting length of the workpiece Tool cutting length : , calculated according to 25mm, Cutting length of the cutter : Take , this time select 2mm : Workbench horizontal feed Mobility time 2.5.5 drilling expansion 6-13(1) Drilling to 10Feed rate : According to Table 5-22 of Machine Manufacturing Technology Basic Course Design GuideCutting speed: refer to Table 5-22 of Technical Manufacturing Technology Basic Course Design GuideMachine tool spindle speed : ,The cutting time of the drilling hole is calculated as followsIn the middleLength of the layer to be cut : this time according to the depth of the cutting Tool cut length : : The front angle of the taper shank twist drill is generally 118 degrees. This time is calculated according to 120 degrees.Tool cutting length : , this time is drilling through hole, according to 3mmThe number of passes is 1Maneuver time :(2) Reaming to 13Feed amount : According to Table 5-25 of Machine Manufacturing Technology Basic Course Design GuideCutting speed : Refer to Table 5-26 of the Guidelines for the Design of Mechanical Manufacturing Technology Basic Courses.Machine tool spindle speed : ,The cutting time of the reaming is calculated as followsIn the middleLength of the layer to be cut : this time according to the depth of the cutting Tool cut length : The front angle of the taper shank twist drill is generally 118 degrees. This time is calculated according to 120 degrees.Tool cutting length : , this time is drilling through hole, according to 3mmThe number of passes is 1Maneuver time :Chapter 3 Fixture Design3.1 Proposal of the problemThis time, the housing block process selects the special clamp for the hole in the middle of the large hole 180H7. Since the center hole is very large, it is necessary to select a larger area as the positioning place when considering the positioning. The first thing to consider is its 250. The large end face is additionally considered as an auxiliary positioning reference considering the front and rear end faces and the upper end face.3.2 Selection of positioning criteriaIn this time, the large hole of the bearing seat center needs to place the workpiece horizontally, and the three end points 250 are used as the main positioning reference to limit the three degrees of freedom. This time, four support plates are used, and three of the support plates are positioned and restricted. The other supporting plate only serves to strengthen the strength. The upper end surface or the right end surface limits the two degrees of freedom for a positioning reference, and the lower end surface limits one degree of freedom, so that the entire workpiece is completely positioned, and the positioning is adopted. Support elements are used for the components.3.3 Analysis of positioning errorOne positioning of this time is that the right end surface and the lower end surface are two planes perpendicular to each other, and the positioning error can be analyzed as follows. Figure 3-1 Two vertical plane positioningThe tolerance analysis of two vertical plane positioning is calculated as follows:The choice of this time is 90 degrees, and the two sides of the positioning are 30 and 35 respectively. The positioning error accounts for the machining tolerance and can guarantee the processing requirements.The positioning scheme can meet the processing precision requirements, and the positioning scheme is reasonable.3.4 Calculation of cutting force and clamping force(1) Cutting force calculationThis material is gray cast iron, the tool is made of high-speed steel bore boring tool, turning force according to its longitudinal and transverse turning and boring. (Cutting gray cast iron) :Circumferential cutting force component N: The amount of back-to-back knives refers to the length of the cutting edge during cutting, grooving and forming turning : feed per revolution: Cutting speed: Correction factor , when the thread is threaded : coefficient of mechanical properties of workpiece materials: coefficient of tool geometry parameters(2) Calculation of clamping forceSince the clamping of the workpiece is to clamp the upper portion of the workpiece, the cutting force is the drilling force from top to bottom, so that the clamping force is consistent with the direction of the cutting force. According to the Machine Tool Clamp Design Manual, Third Edition, when the other mid-range cutting force is small, only a small clamping force is required to prevent the workpiece from vibrating and rotating during the machining process.In the middle : prime mover: Actual clamping force required: equivalent friction radius between the end of the screw and the workpiece: half of the thread diameter : Thread angle: friction angle between the end of the screw and the workpiece: equivalent friction angle of the helical pair:Mechanical efficiencyThe motive force in this clamping device is 1072NThe thread diameter of the bolt part of the selected pressing part is 16, that is, the bolt of M16 drives the movable top pin. According to the third edition of the Machine Tool Design Manual (the same below), the spiral in Table 1-2-20 The equivalen