Cnc Milling Machine Mold Processing Experience

Die machining is the most common workpiece processing machinery processing occupation, related to the operator needs to have rich processing experience, the following is a CNC milling machine manufacturer china summed up some CNC Milling machine die processing experience and processing matters needing attention, I hope to help you.

1. The rough mill. In the rough milling should be based on the workpiece surface machining surface to give the margin, with an end milling cutter according to the contour surface layer by layer to milling, this kind of rough milling efficiency is high. The surface after rough milling is similar to the terrace, and the height of the steps depends on the precision of rough milling.

2. Semi-finished milling. The purpose of semi-precision milling is to mill out of the rough milling "terrace" steps so that the processed surface is closer to the theoretical surface, the selection of ball-end milling cutter is generally set aside for the finishing process about 0.5mm machining margin, semi-precision machining line spacing and step spacing than the precision machining.

3. Finishing. This refers to the workpiece final machining of the theoretical surface. When finishing the surface with a ball-end milling cutter, the line cutting method is generally used. For the parts with better openness, the turning point of line cutting should be selected on the outside of the curve table, that is, when programming, the curve should be extended outwardly. Poor appearance of open parts, because the change in cutting speed when turning back, is very simple on the processed surface and the blocking surface, leaving the cut marks caused by suspension and vibration. So in the processing and programming, one is to fall in the feed speed when the turnback, the second is in the programming, by the processing surface turnback point should be slightly away from the obstruction surface. The intersecting line of the curved surface and obstructing surface should be processed separately in a root-cleaning program, so that the processed surface and obstructing surface can be connected smoothly, and will not produce a large cut mark.

4 ball head milling cutter in the milling surface, the cutting speed of the tip is very low if you use a ball cutter straight to be processed surface milling surface more gentle, the ball cutter tip cut out of the appearance of the quality of the poor, so it should be appropriate to improve the spindle speed, other should also prevent cutting with the tip.

CNC Milling Machine 

5. Avoid cutting straight. Common flat cylindrical milling cutter has two kinds, one is the end face has a center hole, its end edge is not the center. The other is the end face without the center hole, the end edge is connected and through the center. When milling a surface, an end mill cutter with a central hole must not feed straight down like a drill, unless a process hole is drilled in advance. Otherwise, the head of the milling cutter will break. If the end of the knife without a center hole can be straight down, but because the Angle of the blade is too small, the axial force is very big, so should try to prevent it. The best way is to feed under the syncline to a certain depth and then cut laterally with the side edge. In milling the groove surface, the process hole can be pre-drilled for cutting. With ball-end milling cutter straight feed effect is better than flat end milling cutter, but also because of the axial force is too large, affect the cutting effect, it is best not to use this way of cutting.

6 milling surface parts, if found parts of the material heat treatment are not good, there are cracks, uneven arrangement, and other phenomena, should be promptly stopped processing, to avoid wasting working hours.

7 in the milling mold cavity more complex surface, the general demand for a long period of time, therefore, in each boot milling before the CNC milling machine, fixture, tool for appropriate inspection, to avoid the onset of problems in the middle of the process, affecting the accuracy of processing, and even waste.

8. When the mold cavity is milling, the file allowance should be properly controlled according to the roughness of the machining surface. About milling more difficult parts, if the surface roughness of the processing is poor, should leave more appropriate file allowance; As for the plane, right Angle groove and other parts of the simple processing, the roughness value of the processing surface should be reduced as far as possible, cut down the amount of repairing files, to prevent the large area of repairing files from affecting the accuracy of the cavity surface.

CNC milling machine is generally used for processing products and processing molds, so we are often positioned as a mold CNC Milling machine or called a molding machine, product machine.