双面铣退刀有划痕怎么解决（Double face milling cutter has scratches, how to solve）

双面铣退刀有划痕怎么解决（Double face milling cutter has scratches, how to solve） 双面铣退刀有划痕怎么解决(Double face milling cutter has scratches, how to solve) There are many kinds of milling cutters. Common milling machines and CNC milling machines can be machined with straight lines, milling centers, machining cavities, cores, and curved surfaces / contours. Roughly divided into: 1. flat milling cutter, rough milling, to remove a large number of rough, small area, horizontal plane or contour milling; 2. ball end mill for surface finish milling and fine milling. The knife can be used to finish milling the small chamfer of the steep surface / straight wall. 3. flat milling cutter with chamfering, can do rough milling to remove a lot of rough, but also fine milling, fine surface (relative to the steep surface), small chamfer. 4. forming milling cutter, including chamfering cutter, T shape milling cutter or drum type cutter, gear cutter, inner R knife. 5. chamfer knife, chamfer knife shape and chamfer shape are identical, divide into milling circle, chamfer and slant chamfer milling cutter. 6.T type cutter can be milled with T groove; 7. gear cutters, milling out various tooth types, such as gears. Milling cutters are commonly made of two kinds of materials: high speed steel and hard alloy. The latter is the former high hardness, strong cutting force, can improve the speed and feed rate, improve productivity, let the knife is not obvious, and the processing of stainless steel / titanium alloy hard processing materials, but the cost is higher, and easy in cutting force rapidly alternating case. With fast development, said the industry is the rotary cutter, as shown in the figure is the whole hard alloy cutter, in fact, now more cutter processing in the hole and cavity, the cutter blade is installed! , understand the milling cutter, we must first understand the milling knowledge In the optimization of milling, milling cutter blade is another important factor, at any time during the milling cutting blade if at the same time in more than a number of advantages, but also in the cutting blade is too many disadvantages when cutting each cutting edge at the same time can not be cut, the power required and in the cutting of the cutting edge is related, chip formation, cutting load and machining results, cutter relative to the workpiece position and plays an important role. In face milling, the thickness of the chip varies little with a milling cutter that is about 30% larger than the cutting width and the mill is located close to the center of the workpiece. In cut in, out chip thickness is slightly thinner than in central cutting. In order to ensure a sufficiently high average chip thickness / feed per tooth, the number of cutter teeth suitable for the process must be correctly determined. The pitch of the cutter is the distance between the effective cutting edges. According to this value will be divided into 3 types: milling cutter tooth milling cutter, milling cutter, cutter tooth thermi. The milling and cutting thickness of face milling cutter and the main angle, the main angle is the angle between the blade main cutting edge and the surface of workpiece, there are mainly 45 degree, 90 degree angle and circular blade, cutting force in the direction of change will change greatly with the different main angle: 90 degrees as the main angle milling cutter mainly produce radial force effect in the direction of feed, which means that the machined surface will not bear too much pressure for the workpiece structure weak is reliable. The main angle cutter 45 degrees the radial cutting force and the axial direction is equal, so the pressure is relatively balanced, the machine power requirements are relatively low, especially suitable for milling to produce short chip workpiece material broken chip. The milling cutter for the round blade means that the main deflection angle varies continuously from 0 degrees to 90 degrees, depending mainly on the depth of the cutting. This blade cutting edge strength is very high, because the chip produced along the length direction of the cutting edge is thin, so suitable for large amount of feed, along the radial direction of the blade cutting force is constantly changing, and in the process of pressure will depend on the depth of cut. The development of the geometric groove of the modern blade makes the circular blade have a smooth cutting effect, low power demand and good stability. Today, it is no longer an effective coarse milling cutter, and is widely used in face milling and end milling. There are two ways of feeding the workpiece relative to the direction of the workpiece and the direction of rotation of the cutter: The first is progressive milling. The direction of rotation of the cutter is the same as that of the cutting. At the beginning of the cutting, the cutter bites the workpiece and cuts the final chip. The second is the inverse milling, feed direction and cutting cutter rotation direction is opposite, milling cutter in the workpiece must be a slip at the beginning before cutting, cutting thickness is zero, to the end of the maximum cutting thickness cutting. The cutting force has different directions on three side edge mills, some end mills or face mills. In face milling, the cutter is just outside the workpiece and should be paid more attention to the direction of the cutting force. In progressive milling, the cutting force presses the workpiece toward the table, while the reverse cutting forces the workpiece away from the table. Because the cutting effect of progressive milling is the best, the milling is usually preferred. Only when the machine has a screw gap problem or has a problem that the milling can not be solved, the reverse milling is considered. Ideally, the diameter of the milling cutter should be greater than the width of the workpiece, and the axis of the milling cutter should always be a little distance away from the center line of the workpiece. Burr is easily produced when the tool is placed against the cutting center. Continue to enter and exit the cutting edge cutting cutting cutting force in radial direction will change, it may damage the spindle vibration and blade, and the surface will be very possible fragmentation of rough milling slightly off center, cutting force fluctuation will no longer milling tool will get a preload. We can compare central milling to driving at the center of the road. Each time the cutter enters the cutting edge, the cutting edge is subjected to impact load, and the load depends on the cross section of the chip, the workpiece material and the type of cutting. It is an important direction to cut between cutting edges and workpiece correctly when cutting and cutting out. When the cutter axis is entirely outside the width of the workpiece, the impact force at the cutting point is borne by the outermost corner of the blade, which means that the initial impact load is held by the most sensitive part of the tool. The milling cutter also leaves the workpiece at the end of the knife, i.e., the blade is cut from start to finish, and the cutting force acts on the outermost point until the impact is unloaded. When the center line of the milling cutter is just on the edge of the workpiece, the blade is removed from the cutting when the chip thickness reaches the maximum, The impact load reaches the maximum when cutting in and out. When the cutter axis is located within the width of the workpiece, the initial impact load is taken along the cutting edge from the most sensitive point away from the cutting edge, and when the tool is retreated, the blade is relatively stable. For each blade, the way the cutting edge moves away from the workpiece is important when exiting the cutting. When approaching the knife, the remaining material may reduce the clearance of the blade. When the chips from the workpiece along the blade rake surface will produce an instantaneous tensile force on the workpiece and often produce burr. This tensile force endangers the cutting edge safety in hazardous conditions. When the axis of the milling cutter and the edge of the workpiece coincide or approach the edge of the workpiece, the situation will be serious. Achieve a better milling summary: Check the power and stiffness of the machine to ensure that the required milling cutter diameter can be used on the machine tools. On the main shaft, the suspension of the tool can reach the minimum as much as possible, and the influence of the axis of the milling cutter and the position of the workpiece on the impact load will be reduced. The correct cutter suitable for the process of the distance, to ensure that in the cutting blade at the same time not too much and the workpiece caused by meshing vibration, on the other hand, in the narrow milling workpiece or milling the cavity to ensure the blade and work engaging enough. Ensure that the amount of feed per blade is applied so that the correct cutting effect can be achieved when the chip is sufficiently thick, thus reducing tool wear. An indexable blade with a forward rake groove can be used to achieve a smooth cutting effect and minimum power. Selection of milling cutter diameter suitable for workpiece width. Selects the main angle right. The proper placement of the milling cutter. We only use cutting fluid when necessary. To follow the rules of tool maintenance and maintenance, and monitoring of tool wear. Expand other similar answers (2) hide other similar answers (2)