BlueprintReadingfortheMachineTrades,SixthEditionUnit.ppt

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 8. Is the material (a) low-, (b) medium-, or (c) high-carbon steel? (a) Low-Carbon Angle Plate * 9. Is the drawing (a) half scale or (b) double-scale? (a) Half-Scale Angle Plate * 10. Are threads (a) left-hand or (b) right-hand? (b) Right-Hand Angle Plate * 11. What class of fit are the threads? Class 2 Angle Plate * 12. What thread form is specified? Unified Angle Plate * 13. What thread series is specified? Fine Series Angle Plate * 14. What is the thread pitch? (Answer decimally.) .05 Angle Plate * 15. How many threads will each hole contain? 5 Angle Plate * 16. What is the overall length of the slotted hole? 1.688 Angle Plate * 17. What is the radius at the ends of the slotted hole? .094 Angle Plate * 18. What do the parentheses enclosing the .25 dimension indicate? Reference Angle Plate * 19. What is the minimum spacing permissible between threaded holes? (C to C.) 1.997 Angle Plate * 20. What is the maximum overall length permissible for the slotted hole? 1.694 Angle Plate * Bend Allowance Allowance must be made for the bend in sheet metal Developed length is the length before bending * Bend Allowance Developed length Sum of flat sides Added to distance around bend measured along neutral axis * Bend Allowance Neutral axis is approximately 0.44 of metal thickness Measured from inside surface * Bend Allowance Use the following empirical formula BA=(.017453R+.0078T) N R is inside radius T is metal thickness N is number of degrees of bend * Bend Allowance * Calculate the developed blank for the shape shown. Use the empirical formula and round your answer to three decimal places. 2.918 Bend Allowance Calculations * 2.917 Calculate the developed blank for the shape shown. Use the empirical formula and round your answer to three decimal places. Bend Allowance Calculations *