The interaction between the tool and the workpiece during the metal cutting process and their respective changes are a discipline. In the design of machine tools and tools, the development of cutting processes and their quotas for machine parts, the rational use of tools and machine tools, and the control of cutting processes, the use of metal cutting principles must be used to achieve economical, high-quality and high-efficiency machining of machine parts. the goal of. The following ALLES CNC will briefly introduce the conventional cutting process improvement schemes:
First, the selection of cutting tools
Under normal circumstances, there is a certain difference between the finishing and roughing of the workpiece. In roughing, since it is not necessary to consider the accuracy and quality problems, the metal material can be cut off to the maximum extent, so the large-diameter tool can be selected to reduce the number of passes and shorten the pass time. Titanium Machinery is the main product of the company with rotary top, screw, shaft machining, CNC lathe machining, shank shank and collet post. In addition, in the roughing, try to choose the squeegee instead of the squeegee. Increasing the feed per revolution, the cutting speed can be increased at the same speed. In the finishing process, in addition to considering the problem of efficient removal of materials, the problem of force deformation control of thin-walled members during cutting should also be fully considered.
There are also differences in the tools selected for workpieces of different materials. The cutting of aluminum alloy materials is not required for tool materials. Generally, carbide milling cutters can be used. The coatings can be coated with no coating or diamond. K series carbide tools should be used for the finishing of aerospace aluminum alloy thin-walled parts.
Second, the adjustment of the tool angle
Too small a front angle of the tool will increase the cutting deformation and friction. The wear of the rake face will increase the tool life, and the selection of the tool back angle will affect the tool stiffness. In order to reduce the friction between the tool and the workpiece, the back angle must be selected to be larger. If necessary, the double chamfered back angle can be used to ensure the rigidity of the tool while increasing the back angle. The angle of the blade affects the direction of the chip outflow and the amount of each component of the cutting force. A large blade inclination angle should be used when cutting the aluminum alloy.
Third, the choice of cutting oil
Cutting oil plays a role in the cutting process in the cutting tool. The cutting oil product with good performance has good extreme pressure and anti-wear performance, prevents the tool from directly contacting the workpiece, reduces the difficulty of the cutting process, and can effectively protect the cutting tool. And greatly improve processing efficiency.
According to the actual process conditions, the special cutting oil can be used to solve the problems of poor precision of the workpiece due to oil problems, fast tool wear, rusting of the machine and large smoke during processing, and reduce the equipment maintenance cost of the enterprise.
Fourth, the path of the knife
A more effective method for speed-increasing efficiency is to optimize the path of the tool. In the high-speed cutting, the directionality of the tool path should be guaranteed, that is, the tool path should be as simple as possible, with fewer turning points, the path should be as smooth as possible, and the rapid steering should be reduced; Knife time, increase the proportion of cutting time in the whole workpiece as much as possible; try to use circuit cutting, reduce the cutting and cutting times of the tool without interrupting the cutting process and tool path, and obtain a stable, efficient and high-precision cutting process.
In the case of beveling, if the horizontal horizontal pass is used, the distance of each pass is very short. During the cutting process, the spindle needs frequent commutation, the cutting stability is poor, and the cutting is inclined, which is not conducive to the cutting speed. Selecting the quality machine tool accessories to look for Titanium Machinery, therefore, for such bevel machining, the path of the tool is arranged as parallel as possible to the longest bevel, not only the longest path, but also the least number of commutations, even under high-speed cutting. Reduce tool damage.
Five, cutting parameters
In roughing, it is generally possible to select a "high-power" high-efficiency cutting with a large feed rate and a moderately large cutting depth combined with a medium cutting speed, which can achieve a high material removal rate, thereby greatly improving production efficiency. For finishing, it is feasible to increase the rotational speed and increase the number of teeth. Increasing the feed per tooth may reduce the surface accuracy and cause residual stress to cause deformation. Therefore, the "light cut and fast cut" of the high cutting speed and low feed per tooth is often used to ensure the improvement of production efficiency and the accuracy and surface quality of the product.
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