Annual Day 2011,NTTF ONTC-Video

FAQ-Press Tool technology

1.     What is press tool? 

2.     Where press tool is used?

3.     What is strip lay out?

4.     What d you mean by cutting force & stripping force?

5.     What dou you mean by hybrid punches?

6.     What is cutting clearence?

7.     What is the difference between blanking & piercing?

8.     What is knock out rod?     Where it is used?

9.     What do you mean by spring back?

10. What is the different type of piloting punch?

11. What is the diffrence between direct piloting & indirect piloting?

12. What is notching tool?

13. What is shedder?    It is used?

14. What is the diffrence between stop position &registrery position?

15. What is dinking tool?

16. Why side cutters are used?

17. What is the difference between cut off & parting off?

18. What is the difference between trimming & shaving operations?

19. Define deep drawing?

20. Define curling?

21. What are assembly tools?

22. List out some kind of press tool operations?

23. What do you mean by side cam operations?

24. What is the diffrence between bending & forming?

25. Define swanging & extrution?

26. What dou you mean by cold forming?

27. Define horning?

28. What are the six types of cold rolled steel?

29. What is unit stock?

30. What is piece part?

31. What dou you mean by stock material?

32. What is the diffrence between hot rolled steel & cold rolled steel?

33. Define shearing theory?  And its 3 stages?

34. What is the formula for finding press force?

35. What do you mean by optimum cutting clearence?

36. What are the effects of excecive & insufficient cutting clearence?

37. What do you mean by burr side?

38. How to determine the punch & die size for piercing & blanking?

39. When a guide plate tool is preffered?

40. What are the elements of guide plate tool?

41. What do you mean by stopper?

42. What do you mean by land? Mention its importance?

43. What is angular clearance and where it is used?

44. What is the purpose of a shank in a tool?

45. What is the function of a back plate?

46. Hardness of punch and die?

47. Why die is harder than punch?

48. What is the importance of fastners in a tool?

49. What is the box stripper?

50. What are the alloy berrillium copper and its percentage?

51. What is meant by deep drawing steel sheet?

52. What is meant by progressive operation in press tool and its different stage?

53.  what are advantages of progressive tool?

54. What are disadvantages of progressive tool?

55. What are the principles of bending?

56. How plastic deformation occurs in bending?

57. What are the bend elements?

58. What is neutral axis in bend elements?

59. What is the formula for calculating neutral and centre fibre?

60. What is the formula for finding the max and min radius in bending?

61. How bending dies are classified?

62. What is the v- bending die?

63. What is the speciality of u -bending die?

64. What is the fn of pressure pad in bending?

65. What is the formula finding v- bending force?

66. What is the effect of grain direction on bending?

67. Define gang piercing tool?

68. Define angular &side piercing tool?

69. Define fine blanking?

70. Define compound die system with fixed punch?

71. Define shaving?

72. Define press force?

73.  define v-ring?

74. Define planishing?

75. Define curling?

76. What is eyelet drawing?

77. Define reverse drawing?

78. What is drawing force?   Where it is used?

79. What is the need of flanging?

80. Define croping wire hooks?

81. What for shaving is done?

82. Explain about shaving direction?

83. What for air vent is provided in punch &die for drawing operation?

84. Explain the role of lubricants during deep drawing operation?

85. What is deep drawing?

86. With the help of sketch show different force acting on the component while drawing?

87. Eqn for find out the economic factore?

88. Define burr side?

89. In blanking, the burr side will be which direction?

90. In piercing, the burr side will be which direction?

91. What are the factors to be considered while deciding strip lay out?

92. What is stock material?

93. What are the factors to be considered before determine the best methode of positioing a blank in the strip lay out?

94. What is the different layout?

95. What is narrowing run & wide run?

96. What is a single row 2 pass method?

97. What is gange dies?

98. What is angular layout?

99. Classification of punches?

100.                    What is cutting punches& non-cutting punches?

101.                    What is seggrated & integrated punches?

102.                    What is perforator?

103.                    Where we are uesd keyed punches?

104.                    What is buckling punches?

105.                    Formula for calculating buckling?

106.                    The main factores to be considered designing of a die block?

107.                    Why punch wear faster than die?

108.                    Hardness of punch & die?

109.                    Die blocks are made out of?

110.                    How to find out the thickness of die block?

111.                    What are the adv. Of using die bush?

112.                    What are the factore to be considered while selection of split                       dies?

113.                    What is a liner?

114.                    What are the adv. Of liner?

115.                    The main adv. Of carbide dies?

116.                    Which is the operation we are using in carbide dies?

117.                    What you mean by neasting?

118.                    What are the functions of stoppers?

119.                    Diff. Types of stoppers?

120.                    What is a trigger stopper?

121.                    What is plain stopper?

122.                    Why the trigger stopper is also called automatic stopper?

123.                    Types of trigger stoppers?

124.                    What is a dissapearing pin stopper?

125.                    What is a finger stopper?

126.                    What is a stipper?

127.                    What are the functions of a stipper?

128.                    What are the types of stipper?

129.                    What you mean by hook pin stipper?

130.                    What are the diff. B/w travelling & box stipper?

131.                    Hooks pins are made out of?

132.                    How the presser pad stipper is actuacting?

133.                    What is the spring stipper?

134.                    Applications of spring stipper?

135.                    What is the types of spring stipper?

136.                    Differantiate b/w clamping stipper & non-clamping stipper?

137.                    The main adv. Of compensating washer?

138.                    What you mean by stripping force?

139.                    Formula for finding stripping force?

140.                    What are the factores effacting stripping force?

141.                    What is the a usage of pin gauges in prees tools?

142.                    Types of gauges?

143.                    What is bulge clearance?

144.                     

145.                    What is the usage of extenstion back gauges?

146.                    What is the requirement of strip support?

147.                    What you mean by strip support?

148.                    What is neasting gauges?

149.                    What are the three conditions to meet the best result of nest                       gauges?

150.                    What are the types of nest gauges?

151.                    What is pilots?

152.                    Main purpose of pilots?

153.                    How we can be finding out the pilot size?

154.                    What is the need of pilot?

155.                    Types of pilots?

156.                    Why the angle is provided on the pilots?

157.                    Which pilot is used for the soft materials?

158.                    How we can pilot nose profile?

159.                    What is direct piloting?

160.                    What is the difference between direct piloting and indirect piloting?

161.                     what are the methods of piloting?

162.                    What are the part conditions that required for the indirect piloting?

163.                    What you mean by piloting punches?

164.                    When we prefer direct piloting?

165.                    What are the functions of pilots?

166.                    Why the retractable pilots are spring loded?

167.                    What is scrap bridge?

168.                    What is a prograssive tool?

169.                    When a progressive tool is prefered?

170.                    What are the factors to be considered before producing a prograssive tool?

171.                    What is shut height?

172.                    What is the purpose of pilots?

173.                    What is mean by pilots?

174.                    Differents types of pilots?

175.                    Define retractable pilots?

176.                    Define the methodes of piloting?

177.                    Difference between direct and indirect piloting?

178.                    Define the seven conditions required in direct piloting?

179.                    What is bullet nose pilot?

180.                    What is mean by pilot in punches?

181.                    What are the advantages of die sets?

182.                    What is the importence of top and bottom plate in die set?

183.                    What is the fuctions of removable guide pillers?

184.                    Define three piller die set?

185.                    Define four piller die set?

186.                    Define two piller die set?

187.                    Define heavy duty die set?

188.                    Define floating adapter die set?

189.                    What is fool proofing?  

190.                    When we use center piller die set?

191.                    What is the importance of the die set in a press tool?

192.                    What are the factors to be consedered when selecting the die                 set? 

193.                    Which are the die set elements?

194.                     why we are using removable guide pillers?

195.                    Why we are using offset pillers?

196.                    Different types of guide bushes? 

197.                    Define ball bearing die set?

198.                    Direction of the feed is the important factor for selecting die set, why?

199.                    What is a blanking tool?

200.                     what is a piercing tool?

201.                    What is a cut off tool?

202.                    What is a broaching tool?

203.                    What is an extrooding tool?

204.                    What is a cold forming tool?

205.                    What is a side cam tool?

206.                    What is a forming tool?

207.                    What is a bending tool?

208.                    What is a trimming tool?

209.                    Why side cutters are used in press tools?

210.                    What do you mean by ejectors and shedders?

211.                    What is a knock out system?

212.                    Explain about different types of fastners?

213.                    Fit between dowel and hole?

214.                    Grade of dowel?

215.                    Different types of screws?

216.                    Why compound tool is prefered?

217.                    What do you mean by pit man?

218.                    What is shut height of a tool?

219.                    What is die space?

220.                    What are the classification of press?

221.                    What do you mean by die cushions?

222.                    How to feed the strip in to tool?

223.                    What are the strip feeding equipments?

224.                    What are the different types of feeding of strip into tool?

225.                     how the hydraulic press works?

226.                    What are coining dies?

227.                    What are angular & side piercing tool?

228.                    What are pivoted bending punch? & what are their use in

229.                    Progressive tool? 

230.                    Which materials are suitable for fine blanking?

231.                    What is a shavng allowence?

232.                    What is embossing?

233.                    What is coining?

234.                    What is flanging?

235.                    What is iorning?

236.                    What are the faults occuring during deep drawing?

237.                    How air vents are given?

238.                    What is annealing?

239.                    What is mean by extrusion?

240.                    How we can check die clearence?

241.                     what are the factors of tool life?

242.                    What is slug pulling?

243.                    What is gas nitriding?

244.                    What is iron nitriding?

245.                    What is transfer presses?

246.                    Type of transfer presses?

247.                    Difference b/w mechanical & hydraulic transfer presses?

248.                    What is cross bar punch presses?

249.                    What are the characteristics of tool & die steels?

250.                    What is cryogenic treatment?

251.                    Type of extrusion dies?

252.                    What is powder metullurgy process? Punch?

253.                    Determines the factors of tool life?

254.                    What is cutting draft angle?

255.                    Diff. B/w backward & forward extrusion dies?

256.                    What is automation?

257.                    What is press layout?

258.                    What is cross bar transfer press?

259.                    What is billet?

260.                    What is semi finished products?

261.                    How to prepare the billet or slug preparation?

262.                    Define billet seperation process in forging?

263.                    What is extrusion & it’s applications?

264.                    What are the 3 types of extrusion?

265.                    Define backward extrusion dies?

266.                    Diff. B/w forward extrusion die & combination die?

267.                    Explain about coining dies in the coining process?

268.                    Describe about punch desing in extrusion process?

269.                    Why stripping force of piercing punch is greater than blanking   punch?

270.                    In apress tool punch will wear faster than die, then why we are    hardening die more?

                                        compiled by d3_nttf ontc 2008-11