Milling method
10 11月 2023 | 没有评论 | posted by admin | in Article
Milling method, relative to the feed direction of the workpiece and the rotation direction of the milling cutter there are two ways: up-milling and up-milling.
The first type is down milling, the direction of rotation of the milling cutter and the feed direction of the cutting are the same, and the milling cutter bites the workpiece and cuts the last chip at the beginning of the cutting.
The second is inverse milling, the direction of rotation of the milling cutter and the feed direction of the cutting are opposite, the milling cutter must slip a section on the workpiece before starting to cut, starting with zero cutting thickness, and reaching the maximum cutting thickness at the end of the cutting.
In a three-edge mill, some end milling or face milling, the cutting force has different directions. When milling, the milling cutter is just on the outside of the workpiece, and the direction of the cutting force should be paid special attention. In up-milling, the cutting force pushes the workpiece toward the table, and in up-milling, the cutting force pushes the workpiece away from the table.
Due to the best cutting effect of down-milling, down-milling is usually preferred, only when the machine has a thread clearance problem or a problem that can not be solved by down-milling, it is considered to reverse milling.
Ideally, the diameter of the cutter should be larger than the width of the workpiece, and the axis line of the cutter should always be slightly away from the centerline of the workpiece. When the tool is placed directly against the cutting center, it is easy to produce burrs. The direction of the radial cutting force will change when the cutting edge enters the cutting and exits the cutting, the machine spindle may vibrate and be damaged, the blade may shatter and the machining surface will be very rough, the milling cutter is slightly off-center, the direction of the cutting force will no longer fluctuate – the milling cutter will obtain a preload. We can compare center milling to driving in the center of the road.
Each time the cutter blade enters the cutting, the cutting edge is subjected to impact loads, and the size of the load depends on the cross section of the chip, the workpiece material and the type of cutting. When cutting in and out, whether the cutting edge and the workpiece can be correctly occluding is an important direction.
Milling cutter types and uses
9 11月 2023 | 没有评论 | posted by admin | in Article
Milling cutter types and uses:
Broadly divided into:
1) Flat end milling cutter, rough milling, remove a large number of blank, small area horizontal plane or contour milling;
2) Ball end milling cutter, surface semi-finishing and finishing milling; The knife can fine mill small chamfers on steep faces/straight walls
3) Flat head milling cutter with chamfer, can do rough milling to remove a large number of blanks, but also fine milling flat front (relative to steep) small chamfer.
4) Forming milling cutter, including chamfer cutter, T-shaped cutter or called drum cutter, tooth cutter, internal R cutter.
5) chamfer knife, chamfer knife shape and chamfer shape is the same, divided into milling round chamfer and bevel chamfer milling cutter.
6) T-cutter, milling T-groove;
7) Tooth cutter, milling out a variety of tooth shapes, such as gears.
8) Rough cutter, designed for aluminum copper alloy cutting rough milling cutter, can be processed quickly.
Features of DLC coated three-edge milling cutter.
7 11月 2023 | 没有评论 | posted by admin | in Article
Three-edge milling cutter is characterized by long service life, high finish, more durable, this is a special tool for milling aluminum materials, the material is high-quality tungsten steel, the surface is covered with a layer of DLC coating, the use of tool wear is small, smooth chip removal, high temperature resistance, it can also extend the service life to more than 3-5 times the ordinary milling cutter.
