Cover plate machining, in the ordinary processing process, can be simplified in terms of positioning datum, clamping method, tool, cutting method, etc., but the data processing process is more complicated and needs to be fully considered. In addition, even if the same machining task is the same, the CNC machining process can have multiple schemes, and multiple machined parts and tools can serve as the main line of the process. The process has diversified characteristics, which is the obvious difference between CNC machining technology and traditional machining technology.
In order to achieve the surface treatment process to improve the mechanical properties of the workpiece, such as quenching, carburizing and quenching, etc., should be arranged between semi-finishing and finishing. In order to improve the surface wear resistance, corrosion resistance and surface decoration of the workpiece surface treatment processes, such as chrome plating, galvanizing, blackening, bluing, anodizing, etc., should be arranged in the final stage of machining. In order to achieve different performances of machined workpieces in different CNC machining stages, corresponding surface treatment procedures should be carried out. The arrangement of these surface treatment procedures is orderly, not random. damage to the workpiece.
The process of large-scale machining is the basic unit that constitutes the machining process. The so-called process refers to the part of the process that a worker (or a group of) continuously completes on a machine tool (or a work site) on the same workpiece (or on several workpieces at the same time). The main features of a process are that the processing objects, equipment and operators are not changed, and the content of the process is completed continuously. To formulate the machining process, it is necessary to determine the number of processes that the workpiece will go through and the sequence in which the processes are carried out. Only a brief process of the main process name and its processing sequence is listed, which is called the process route.
Electrodeposition of metals is a process in which a metal layer is formed on a solid surface by an electrolytic method, that is, a reduction reaction of metal ions on the cathode of an electrolytic cell and an electro-crystallization process. Its purpose is to change the surface properties of solid materials or to prepare metal materials with specific compositions and properties. Induction heating: The workpiece is placed in the inductor, and the inductor is generally a hollow copper tube inputting intermediate frequency or high frequency alternating current (300-300000Hz or higher). The alternating magnetic field generates an induced current of the same frequency in the workpiece. The distribution of this induced current in the workpiece is uneven, it is strong on the surface, but weak in the interior, and it is close to zero in the center, using this skin effect , the surface of the workpiece can be heated rapidly, the surface temperature rises to 800-1000 ℃ in a few seconds, and the temperature of the core part is very small.
Precision parts processing precision skills have become an indispensable skill for precision machining enterprises. Resisting high-precision precision parts is really inseparable from it. In the future, the competition of the industry will eventually fall into the competition of ultra-high precision. Therefore, the market prospect of precision technology is absolutely immeasurable.
In addition to the fluctuation of hydraulic and pneumatic sources in the machining of precision parts, the working environment has a great impact on the processing quality. Therefore, the working environment is a necessary condition to ensure the processing quality. The working environment mainly requires temperature, purification and anti-vibration. The influence of environmental temperature changes on the accuracy of machine tools is particularly significant, including temperature changes due to thermal factors caused by machining errors. Dust with a total machining error of (4070)% will cause scratches on the surface of the workpiece and affect the surface quality. During the process, such as vibration , the surface of the workpiece has been processed with stripes or fabric traces, and the surface finish is significantly reduced.
In order to make the performance of the manufactured mold meet the design requirements, we should solve the common problem in the mold manufacturing process of overcoming the deformation caused by the internal stress during the processing. We generally select several surfaces in different directions as observation surfaces for self-detection of the degree of three-dimensional deformation during rough machining. If there is no ready-made, it can be attached and cut off after finishing. The additional observation surface should not be too small, and the observation will be inaccurate if it is too small. The principle is: the bigger it can be, the bigger it is, and it is easy to remove.
The geometric accuracy (roundness, cylindricity) of the journal should generally be limited to the diameter tolerance point. For those with higher requirements on geometric shape accuracy, the allowable tolerance can be specified on the part drawing. Position accuracy refers to the coaxiality of the matching journal of the assembly transmission part relative to the support journal of the assembly bearing, which is expressed by the radial circular runout of the matching journal to the support journal; according to the requirements of use, the high-precision shaft is specified as 0.001 ~ 0.005mm, while the general precision axis is 0.01 ~ 0.03mm. In addition, there are also requirements for the coaxiality of the inner cylindrical surface and the perpendicularity between the axial positioning end face and the axis line.
High-speed rotating moving parts should stop the necessary static or dynamic equilibrium experiments. Reliable buffering measures must be taken for moving parts with inertial collision to avoid injury accidents caused by inertia. Working position The working position of the machining equipment should be safe and secure, and it should be ensured that the operator’s head, hands, arms, legs and feet have enough space for activities that meet the psychological and physiological requirements. Machining equipment should preferably use work chairs that are easy to adjust to increase operator comfort and ease of operation.
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