The processing procedure of self inspection of computer gong 1. The processor must see the contents of process card before processing, know the parts, shape, drawing dimensions of the workpiece to be processed and know the processing contents of the next process. 2. Before clamping, the blank size shall be measured to meet the requirements of the drawing. When clamping, it is necessary to carefully check whether the placement of workpiece is consistent with the programming operation instruction. 3. After rough machining, self inspection shall be carried out in time to adjust the error data in time. The self inspection content is mainly the position dimension of the processing part. For example: (1) whether the workpiece is loose; (2) whether the workpiece is correctly divided; (3) whether the dimension from the processing part to the reference edge (reference point) meets the requirements of the drawing; (4) the position dimension between the processing parts. After checking the position dimension, the rough machined shape ruler shall be measured (except for circular arc). 4. After rough machining, the finishing can be carried out only after self inspection. After finishing, workers shall check the shape and dimension of the processed parts: check the basic length and width dimensions of the processing parts of the vertical plane; measure the base point dimension on the drawing for the machining parts of the inclined plane. 5. The workers can remove the workpiece and send it to the inspector for special inspection after they have completed the self inspection of the workpiece and confirmed that they are in conformity with the drawings and process requirements. High speed CNC is based on the characteristics of digital control technology. Because the effective control machine tool adopts servo motor and digital technology realizes the direct control of the working sequence and movement displacement of the parts executed by the machine tool, the transmission structure of traditional machine tool is cancelled or partially cancelled, so the mechanical structure also greatly simplifies the digital control, and requires the mechanical system to have high transmission rigidity and no transmission clearance To ensure the implementation of control instructions and the realization of control quality. At the same time, with the continuous improvement of computer level and control ability, it is possible to allow more functional parts to perform all kinds of auxiliary functions required at the same time on the same machine tool. Therefore, the mechanical cutting of CNC machine tool has higher integration function requirements than traditional machine tools. From the perspective of the requirements of manufacturing technology development, with the emergence of new materials and new processes, and the market competition for low cost requirements, metal cutting is developing towards the direction of higher cutting speed and precision, higher production efficiency and more reliable system. This requires that the CNC machine tools developed on the basis of traditional machine tools have higher precision, more driving power, better static and thermal stiffness of mechanical mechanism, more reliable work, and can achieve continuous operation and as little downtime as possible. The mechanical structure of the typical CNC milling machine is mainly composed of the basic parts, the main transmission system, the feed transmission system, the rotary table and other mechanical function accessories. The foundation of CNC milling machine is usually the structural parts of bed, column, beam, workbench and base. The size of the basic parts is large (commonly known as large piece), and the well constitutes the basic frame of the machine tool. Other components are attached to the base member, and some parts also need to move along the base member. Because the foundation plays a role of support and guidance, the requirements for the foundation are good stiffness
The importance of CNC machining spindle 1. The parameters of input starting point shall be reviewed in high-speed CNC processing. It is strictly forbidden to knock or impact the rotor end of spindle motor during operation. The operator is required to pay attention to the starting point of z-axis when aligning the tool to prevent misoperation. To avoid the impact and knife binding phenomenon in the operation process, the bearing of the spindle motor will be damaged. Once there is a phenomenon of knife binding, stop the machine immediately to prevent the bearing from causing more damage due to high-speed operation. Then, start running in from low speed, and the time is slightly longer than normal running in time, until the motor is running smoothly and normally before starting to work. 2. To ensure the motor cooling cycle system of the carving and milling machine works normally, before starting the machine. Then turn on the spindle motor, and it is strictly forbidden to use the spindle motor without cooling. The working environment temperature should not be higher than 30 ℃, when the ambient temperature is higher than 30 ℃, air conditioning shall be used, or forced cooling of the main shaft motor shall be performed by using a refrigerator. 3. The spindle motor of high speed CNC machining shall be preheated step by step according to the principle of running from low speed to high speed. When the motor reaches the required speed and the no-load operation is stable and the temperature is cooled, the machining can be carried out, so as to ensure the better machining accuracy. 4. When planning the cutter path, it is necessary to ensure the reasonable force on the spindle motor and carve according to the principle of knife provided by the technical service personnel. It is necessary to prevent vertical cutting, and it is strictly forbidden to overload the spindle motor, so as to ensure the normal service life of the spindle motor. 5. Generally, the spindle motor should be disassembled and reassembled for about one year, so as to ensure the bearing accuracy and extend the service life. In order to ensure the normal and good operation of the spindle motor, the assembly and assembly of the spindle motor must be carried out by experienced professional operators, in a clean environment and with appropriate tools. Do not knock it randomly. For the temporarily unused spindle, the residual water in the water chamber shall be blown out with compressed air, and the sleeve and shaft hole of shaft head shall be oil protected and put in a cool and dry place. 6. The high speed CNC processing water quality must be clean, and the cooling water of spindle motor uses pure water. In order to prevent the occurrence of microorganism and scale, water should be changed every seven days under normal conditions. When the surrounding environment is higher than 30 ℃ and there is no forced cooling measures, the purified water should be replaced once a day when the water temperature is the highest. In addition, operators should develop the habit of observing the water temperature during work, and change water when the water temperature exceeds 30 ℃
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