China Quality parts Professional Precision machining,Precision parts processingMotor shaft, Bushings, rivets, special screws, nuts, etc.Precision partsProcessing. Products are widely used in automotive, communications, medical, watch, mobile phone, computer and other industries.
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Introduce the process and steps of Precision machining
Today I would like to briefly introduce the Precision machining process and steps with you. The administrator, of course, does not know the situation very well, so I found the companys technical staff to understand it. The technical staff of Quality parts told us that the Precision machining process generally follows the establishment of mechanical processing procedures, It can be roughly divided into two steps. The first is to formulate the processing route of Precision parts processing. To put it bluntly, first analyze the parts that need to be processed. If there is no physical part, you can analyze the drawings of the parts. Then according to the analysis and the prepared report, determine the process size of each process, the equipment and process equipment used, and the cutting specifications, working time quota, etc. The preparation of the process route is to formulate the overall layout of the process. Whether a part is processed is good or not. The main task is to select the processing method of each surface, determine the processing order of each surface, and the number of processes in the entire process. This step is critical. You only have to do all the preparations for the sake of order, the following things will be easy to handle. The general principle of formulating the process route (this step is generally done by the design engineer) 1. Process the datum first. During the processing of parts, the surface used as the positioning reference should be processed first, and the general part shape should be processed according to the drawings or the parameters analyzed before. In order to provide a precise benchmark for the processing of subsequent processes as soon as possible. It is called "benchmark first". 2. Divide the processing stage. Surfaces with high processing quality requirements for Precision parts are divided into processing stages, which is very important and complicated. Generally can be divided into three stages of roughing, semi-finishing and finishing. The main purpose is to ensure the processing quality; it is conducive to the rational use of equipment; it is convenient to arrange the heat treatment process; and to find the rough defects when it is convenient. 3. Face first and then hole. For parts such as boxes, shafts and connecting rods, the plane should be processed first and then the hole. In this way, the holes can be positioned and processed in a plane to ensure the accuracy of the position of the plane and the hole, and it is convenient for the processing of the holes on the plane. Relatively speaking, the processing plane is simpler, and the hole is more complicated. First, do the short answer and do the complicated one. This is more reasonable. 4. Finishing processing. Workpiece after finishing. This is also the last step, which is also very important. The finishing of the main surface (such as grinding processing, honing processing, precision grinding processing/rolling processing, etc.) should be carried out at the final stage of the process route. The surface finish after processing must meet the requirements of customers and must be ensured Place the processed Precision parts and try to handle them gently, because slight collisions will damage the surface. In countries such as Japan and Germany, after finishing, they must be protected with flannel, and it is absolutely forbidden to use hands or other The object directly contacts the workpiece to prevent the finishing surface from being damaged due to transfer and installation between processes. After all, it is Precision parts, so the requirements of the parts are relatively high. If there is something wrong, it will affect the use of the parts. The above is the general arrangement of processing procedures. Of course, there are some special situations, some specific situations can be handled according to the following principles. (1) In order to ensure the accuracy of parts processing. Roughing and finishing are best done separately. Because the amount of cutting is large during roughing, the cutting force and clamping force of the workpiece are large, and the amount of heat is large. The machining surface has a significant work hardening phenomenon. There is a large internal stress inside the workpiece. If rough machining and If the finishing is carried out continuously, the accuracy of the parts after finishing will be quickly lost due to the stress redistribution. For some parts that require high machining accuracy. After roughing and before finishing, low-temperature annealing or aging treatment should also be arranged to eliminate internal stress. This is very important. There are conditions. Try to separate finishing and roughing as much as possible. Be aware that if you plan to save time, you may bring a large part of parts that are not qualified and the loss is greater. Of course, this is also based on It depends on the situation. (2) Reasonably choose Precision parts processing equipment. Roughing is mainly to cut off most of the machining allowance, and does not require high machining accuracy, so roughing should be performed on a machine tool with large power and low accuracy. The finishing process requires higher precision machine tools. Roughing and finishing are processed on different machine tools, which can not only give full play to the equipment capacity, but also extend the service life of precision machine tools. At this point, the company Quality parts did a very good job. It purchased machine tools imported from Japan for precision machining. (3) In the mechanical processing route, there are often heat treatment procedures. The location of the heat treatment process is as follows: To improve the cutting performance of metals, such as annealing, normalizing, and tempering, it is generally arranged before machining. In order to eliminate internal stress, such as aging treatment, tempering treatment, etc., it is generally arranged after rough machining and before finishing machining. In order to improve the mechanical properties of parts, such as carburization, quenching, tempering, etc., it is generally arranged after mechanical processing. If there is a large deformation after heat treatment, the final processing procedure must also be arranged. The above is the mechanical processing technology and process of Quality parts company recorded by the administrator. These are the company's technical staff and I said, they are workers who work hard on the front line, so they know every aspect of it, and thank them for their efforts. 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