Cause analysis and preventive measures of the hott

2022-08-02
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Cause analysis and preventive measures for machine tool injury accidents the causes of machine tool injury accidents are often unsafe operation methods or incorrect processing procedures, that is, the lack of basic training and management. If the equipment is always kept in the best use condition and operated correctly, the injury caused by the machine tool will be very few. At the same time, better use of protective devices will also avoid injury accidents

according to the complete statistics, the automobile lightweight and the improvement of the air quality inside the automobile are the development trend of the automobile industry. The machine tool injury accidents account for more than one third of the mechanical injury accidents, and the nature of the machine tool injury accidents is relatively heavier. According to the survey and statistics of 75 units in a city, there are 1135 punching machines and 39 woodworking planing machines. In 10 years, 798 finger and planer accidents have occurred

I. cause analysis of machine tool injuries

the main causes of machine tool injuries such as ordinary lathes, drilling machines, boring machines, milling machines, planing machines and grinders are summarized as follows:

(1) no safety operation procedures

(2) operation without certificate

(3) no protective and safety devices or defective protective and safety devices

(4) operators' wearing of protective equipment does not comply with the regulations, such as operating without protective glasses and gloves, female workers with long braids and long hair, and operating without tight work clothes, scarves, ties and accessories in the two years since the implementation of made in China 2025

(5) start the machine tool that is not in your charge

(6) shut down for maintenance or overhaul, and did not take measures to cut off the power supply and hang signs

(7) adopt reduced procedures and opportunistic operation methods

(8) the machine tool has defects in design, structure and manufacturing process, and the function degradation of machine tool parts, machine tool accessories and safety protection devices may lead to injury accidents

(9) the protection and safety devices of the machine tool fail due to irregular maintenance, resulting in injury

(10) automatically reverse the machine tool

(11) when the machine tool is running, fasten the workpiece or tool, measure the workpiece, touch the cutting edge of the tool or add oil to the machine tool

(12) the greater the depiction effect of worn particles and the adsorption force between molecules, when the machine tool is running, remove the chips by hand instead of the hook or try to break the long spiral chips by hand

(13) the operator is used to delivering tools and fixtures on the running machine tool

(14) the operator leaves the running machine tool at will

(15) misoperation and misoperation due to inattention or too nervous

(16) not using proper hand tools

(17) the workpiece and cutting tool are not clamped and fly out to hurt people

(18) place the workpiece on or near the rotating workbench

(19) chips accumulate on the workbench

(20) metal chip splashing

(21) the grinding wheel is broken due to improper selection, installation and grinding amount

(22) adjust the coolant when the tool rotates

(23) the operator collides with the machine tool due to improper operation method, excessive force, improper tool specification or tool wear

(24) poor insulation of electrical equipment

(25) unsafe factors of the environment, such as insufficient lighting, harsh lighting, noise interference, improper stacking of parts, improper placement of tools, clamps and measuring tools, no ventilation, greasy dirt on the ground, narrow site, unreasonable layout, etc

II. Machine tool safety operation regulations

in order to operate the machine tool safely, it is necessary to strictly abide by the machine tool safety operation regulations:

2.1 the machine tool operators must receive special safety technical training, master the structure, performance, mechanical principle, scope of use and maintenance knowledge of the machine tool they are operating, and hold the safety operation certificate

2.2 before work, properly wear protective equipment as required. It is not allowed to work with scarves and gloves; Cuffs and lapels must be tied tightly; Machine tool operators are not allowed to wear long braids, shawls and long hair. When working, they must wear a working cap and keep their hair in the cap

2.3 before start-up, it is necessary to check whether various safety protection devices, safety devices, interlocking devices, signal indicating devices, electrical grounding devices and cooling and lubrication systems are in good condition, and start-up can only be carried out after confirmation

2.4 during start-up, manual turning or low-speed idling shall be carried out first to check the operation of the machine tool and the conditions of each transmission part, and the workpiece can be processed only after it is confirmed to be normal

2.5 when operating the machine tool, stand on the wooden pedal, do not step on or rely on the machine tool, and cut off the power supply of the machine tool when disassembling and assembling the workpiece

2.6 hazardous substances must be removed before processing old workpieces

2.7 all jigs and measuring tools must be intact and applicable. They are not allowed to be placed on the guide rail and workbench of the machine tool. It is forbidden to deliver jigs and other objects on the running machine tool

2.8 during operation, wear protective glasses and take measures to prevent personal injury caused by chip splashing; When cutting brittle materials, toxic and harmful materials or sharpening tools, protective glasses or dust-proof respirators must be worn

2.9 after the machine tool is started, the tool should approach the workpiece slowly. The operator should stand in a safe operation position and avoid the running part of the machine and the flying direction of the chips. It is forbidden to blow or pull by hand to remove the chips. The chips should be removed with a hook or brush, and should be removed when the machine is stopped as far as possible

2.10 during the operation of the machine tool, it is not allowed to brake in reverse direction, touch the workpiece or tool by hand, adjust the speed and travel of the machine tool, adjust the workers, clamps and tools, measure the workpiece, lubricate the machine tool and wipe the machine tool. 2.11 during the operation of the machine tool, the operator should always pay attention to the working state of the machine tool. In case of any abnormal condition or fault, the operator must immediately stop the machine, cut off the power supply, and then check it, find out the cause, and start the machine after handling it. In case of sudden power failure or electrical failure, the machine tool or other starting mechanism shall be shut down immediately, and the tool shall be pulled out of the working position and handled by the electrician

2.12 after the machine tool is started, it is not allowed to leave the post without permission. The workpiece processing is stopped during the work. If you leave the post for some reason or cut off the power supply during the work, you must stop and cut off the power supply

2.13 the raw materials, semi-finished products and finished products shall be placed firmly, the workpieces that are easy to roll shall be padded firmly, the oil stains on the ground shall be removed in time, and the workplace shall be kept clean and unblocked

2.14 when more than two people are required to operate a large machine tool, the main operator must be identified, unified command and mutual cooperation must be carried out, and the non main operator shall not order the start-up

2.15 cut off the power supply or main power supply of the machine tool at the end of the work, withdraw the tool and workpiece from the working position, put the handle and hand wheel in neutral, clean and place the tools, clamps and measuring tools used, and scrub the machine tool

2.16 during shift handover, the operation and safety of the machine tool of the shift must be explained clearly, and the handover record must be signed. Good tube Fujian Sanbao Co., Ltd. increased scrap purchase by 30 yuan/ton; Ningbo DPCA scrap increased by 20 yuan/ton; The purchase price of Yantai new Oriental metallurgical scrap increased by 20 yuan/ton; Jiangsu Hongtai scrap increased by 20 yuan/ton; The increase of 20 yuan/ton of scrap steel of Tangshan Xindonghai Special Steel Co., Ltd. is conducive to safe production, forming a good habit of constantly keeping the work in order, which is of great benefit to the safe operation of machine tools, thus greatly reducing the occurrence of accidents

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