TAILIEUCHUNG - MACHINERY'S HANDBOOK 27th ED Part 6

Tham khảo tài liệu 'machinery's handbook 27th ed part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machinery s Handbook 27th Edition CUTTER GRINDING 830 between centers while mounted on a mandrel. The cutter is rotated to the position where the vertical indicator contacts a cutting edge. The second indicator is positioned with its spindle axis horizontal and with the contact point touching the tool face just below the cutting edge. With both indicators adjusted to read zero the cutter is rotated a distance equal to the checking distance as determined by the reading on the second indicator. Then the indicator drop is read on the vertical indicator and checked against the values in the tables. The indicator drops for radial relief angles ground by a disc type grinding wheel and those ground with a cup wheel are so nearly equal that the values are listed together values for the eccentric type relief are listed separately since they are larger. A similar procedure is used to check the relief angles on the side and end teeth of milling cutters however only one indicator is used. Also instead of rotating the cutter the indicator or the cutter must be moved a distance equal to the checking distance in a straight line. Table 4. Indicator Drops for Checking Rake Angles on Milling Cutter Face y LJ ị- Indicator Drop Set indicator to read zero on horizontal Measuring Distance plane passing through cutter axis. Zero cutting edge against indicator. Move cutter or indicator measuring distance. Rate Angle Deg. Measuring Distance inch Rate Angle Deg. Measuring Distance inch .031 .062 .094 .125 .031 .062 .094 .125 Indicator Drop inch Indicator Drop inch 1 2 3 4 5 6 7 8 9 10 .0005 .0011 .0016 .0022 .0027 .0033 .0038 .0044 .0049 .0055 .0011 .0022 .0032 .0043 .0054 .0065 .0076 .0087 .0098 .0109 .0016 .0033 .0049 .0066 .0082 .0099 .0115 .0132 .0149 .0166 .0022 .0044 .0066 .0087 .0109 .0131 .0153 .0176 .0198 .0220 11 12 13 14 15 16 17 18 19 20 .0060 .0066 .0072 .0077 .0083 .0089 .0095 .0101 .0107 .0113 .0121 .0132 .0143 .0155 .0166 .0178 .0190 .0201 .0213 .0226 .0183 .0200 .0217 .0234

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