Talking about the handling principles and safety precautions of mechanical processing, Nanjing Precision Engineering Co., ltd

by:NJPE     2020-02-14
What are the principles of machining? What are the safety precautions during machining? Today, I will give a detailed answer to these two questions, hoping to help the readers. The details are as follows. 1. The processing principle of mechanical processing the processing principle of mechanical processing has three specific points :(1) In order to ensure the machining accuracy, coarse and fine machining should be carried out separately. Because during rough machining, the cutting volume is large, the cutting force and clamping force on the workpiece are large, the calorific value is large, and there is a significant work hardening phenomenon on the machined surface, and there is a large internal stress inside the workpiece, if the rough and rough machining is carried out continuously, the precision of the finished parts will be quickly lost due to the redistribution of stress. For some parts with high machining accuracy requirements. After rough machining and before finishing, low temperature annealing or aging treatment procedures should also be arranged to eliminate internal stress. (2)Reasonable selection of equipment. Rough machining is mainly to cut off most of the machining allowance and does not require higher machining accuracy, so rough machining should be carried out on machine tools with higher power and lower accuracy, finishing process requires high precision machine tool processing. Coarse and fine machining are processed on different machine tools respectively, which can not only give full play to the equipment capacity, but also prolong the service life of precision machine tools. (3) In the machining process route, heat treatment procedures are often arranged. The location of the heat treatment process is arranged as follows: in order to improve the cutting performance of metal, such as annealing, normalizing, quenching and tempering, etc. , it is generally arranged before mechanical processing. In order to eliminate internal stress, such as aging treatment, quenching and 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 carburizing, quenching, tempering, etc. , it is generally arranged after mechanical processing. If there is a large deformation after heat treatment, the final processing process must be arranged. 2. Safety precautions in machining (1) Easy to operate, reduce walking back and forth, and avoid unnecessary bending and tiptoe movements. (2) Accurate and reliable positioning to prevent misoperation caused by slight vibration. (3) The movement direction of the operating parts of the machine tool equipment and the movement direction of the operated parts shall conform to the regulations, and shall be marked with simple symbols. (4) Install necessary interlocking mechanisms to prevent uncoordinated actions of operating parts and accidents caused by uncoordinated operations by multiple people. (5) The structure and arrangement position of the handle, handwheel and button shall conform to the regulations. The start button should be installed in the chassis or installed with a guard ring to prevent accidental touch. When the handwheel and handle installed on the shaft are automatically fed, they will rotate along with the shaft to hurt people, so the automatic release device should be installed. Unless noted, the article is original for Tiecheng machinery large-scale mechanical processing, welcome to reprint! Please indicate the address of this article, thank you. Source: http://www . wxdtc. com/news. asp
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