Points : Difference between ‘Climb and Conventional Milling, Climb or Down Milling, Conventional or Up Milling Milling operations fall into two distinct methods: Climb or Down Milling In climb milling the work moves in the same direction as the rotation of the, cutter. Full engagement of the tooth is instantaneous. The main advantage of climb milling is the tendency of the cutter to press the work down on the work table or fixture. Climb milling is more practical and efficient, and cutters retain sharpness longer because cutting is started at the full thickness of the chip and comes out at zero thickness. Another advantage of down milling is that simpler fixtures may be used because the downward forces against the work-piece make it easier to hold and prevent the work-piece from moving. Climb milling is not recommended or light machines or on large, older machines that are not in Top condition, are fitted with an anti-backlash device Jo take up play. There is danger of a serious accident if there is play in the table, or if the work or holding device is not mounted securely. Conventional or Up Milling In up milling the work is fed against the rotation of the cutter. In this milling there is no problem with backlash in the feed screw. Backlash means lost motion or looseness, a when screw threads become worn. The chip is at minimum thickness at the start of the cut and is so light that the cutter has a tendency to slide over the work until sufficient pressure is built tip to bite into the work. This alternate sliding to start, followed by the sudden break through as the tooth completes the cut, leave marks so familiar on milled surfaces. The marks and ridges can be kept to a minimum by keeping the table gibes properly adjusted. In up milling, the forces have a tendency to pull the work upward in a vice or fixture, which requires stronger clamping methods.
Difference between Climb and Conventional Milling
Points : Difference between ‘Climb and Conventional Milling, Climb or Down Milling, Conventional or Up Milling Milling operations fall into two distinct methods: Climb or Down Milling In climb milling the work moves in the same direction as the rotation of the, cutter. Full engagement of the tooth is instantaneous. The main advantage of climb milling is the tendency of the cutter to press the work down on the work table or fixture. Climb milling is more practical and efficient, and cutters retain sharpness longer because cutting is started at the full thickness of the chip and comes out at zero thickness. Another advantage of down milling is that simpler fixtures may be used because the downward forces against the work-piece make it easier to hold and prevent the work-piece from moving. Climb milling is not recommended or light machines or on large, older machines that are not in Top condition, are fitted with an anti-backlash device Jo take up play. There is danger of a serious accident if there is play in the table, or if the work or holding device is not mounted securely. Conventional or Up Milling In up milling the work is fed against the rotation of the cutter. In this milling there is no problem with backlash in the feed screw. Backlash means lost motion or looseness, a when screw threads become worn. The chip is at minimum thickness at the start of the cut and is so light that the cutter has a tendency to slide over the work until sufficient pressure is built tip to bite into the work. This alternate sliding to start, followed by the sudden break through as the tooth completes the cut, leave marks so familiar on milled surfaces. The marks and ridges can be kept to a minimum by keeping the table gibes properly adjusted. In up milling, the forces have a tendency to pull the work upward in a vice or fixture, which requires stronger clamping methods.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment
Dont paste link here..