How to avoid punch injury accident

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How to avoid punching machine injury accident

using hand safety tools

using hand safety tools can avoid accidents caused by unreasonable mold design and sudden equipment failure. Common safety tools include: elastic pliers, special pliers, magnetic suction cups, tweezers, pliers, hooks, etc

take protective measures for the mold

take protective measures for the mold, including setting protective plates (covers) around the mold and improving the mold structure. Such as reducing the dangerous area of the mold and expanding the safety space; The mechanical discharging device is set to improve the original single process molds with manual feeding without affecting the mold strength and product quality, so as to improve the safety

installing safety protection devices

setting safety protection devices on stamping equipment and dies or using manual tools with low labor intensity and convenient and flexible use are also effective measures to realize the safety of stamping operation under current conditions. Such as manual tools, mold protective covers, mechanical access devices, double button switches, mechanical handles, push and pull devices, photoelectric automatic protection devices, etc. There are many types of protective devices for stamping equipment, which can be divided into mechanical type, button type, photoelectric type, induction type, etc. according to the structure

the mechanical protective device is simple in structure and easy to manufacture, but it has great interference to the operation. The operators do not like to use it, and its application is relatively small

the photoelectric device is composed of a set of photoelectric switches and mechanical devices. When the operator's hand enters the mold area, the light beam is blocked and an electrical signal is sent, so as to achieve the purpose that the slider stops moving and cannot go down, so as to ensure the safety of the operator. Photoelectric protection devices include infrared photoelectric protection devices and incandescent photoelectric protection devices. As the photoelectric protection device is easy to use and has no interference to the operation, it is widely used

the contact protection device uses the contact rod as a sensing element to control the movement of the sliding block. It has two types: normally open and normally closed. The protective device has the advantages of simple structure, low manufacturing cost and convenient operation. When workers work, several sets of devices can be connected in series and used at the same time. The utility model is suitable for a press equipped with a friction clutch and a press modified with a rigid clutch

realize mechanization and automation this section realizes the mechanization and automation of stamping operation, which is the fundamental way to ensure the personal safety of workers and equipment safety. The best technical measure to realize safe production is to realize the fully automatic production of stamping feeding and reclaiming

practice has proved that using compound die and multi station continuous die instead of single process dangerous die, or setting mechanical feeding and discharging mechanism on the die to realize mechanization and automation can achieve the purpose of improving product quality and production efficiency, reducing labor intensity, facilitating operation and ensuring safety

instructions for use of protective device

technical instructions for safety protective device

safety protective device is the most effective safety protective device to protect the personal safety of stamping machine operators at present. It has better protection effect than protective fence, mechanical handle, mechanical dial and other protective devices, so as to avoid safety accidents caused by improper operation or machine failure in the production process. It is applicable to ordinary punches (the company is equipped with a complete set of refitting devices, which can make ordinary punches operate more safely.) High performance punches, mechanical presses, hydraulic presses, film presses, plate shears, industrial robots, packaging equipment and other automatic equipment can also be used for multi-faceted area protection or anti-theft

the safety protection devices are generally divided into two types: the opposite type and the reflective type

the opposite type safety protection device refers to the photoelectric protection device that the light-emitting unit and the light receiving unit are in the light emitter and the light receiver respectively, and the light emitted by the light-emitting unit is directed to the light receiving unit to form a light curtain. The anti radiation safety protection device is composed of five parts: controller, light emitter, light receiver, light emitting transmission line and light receiving transmission line

reflective safety protection device refers to the photoelectric protection device that the light-emitting unit and the light receiving unit are all in the same sensor, and the light emitted by the light-emitting unit is reflected back to the light receiving unit through the reflector, thus forming a light curtain. A safety protection screen is formed between the illuminator and the reflector. Whenever the safety protection screen is disturbed or the equipment is not working normally, the illuminator will send signals to the control system of the press to prevent possible dangerous movement and stop the downward danger of the hammer. The reflective safety protection device is composed of controller, sensor, reflector and transmission line

preventive measures for punch injury accidents

at present, many enterprises still follow the simple manual operation method when using the stamping method for processing and production, that is, directly loading parts from the mold cavity by hand. Moreover, a large number of stamping equipment are responsible for the manufacturing of a variety of products or processes. In this case, if the stamping equipment and dies do not have safety protection devices, it is very easy to cause hand injury accidents due to the working principle of the tensile testing machine. Therefore, strengthening safety protection, safety management and improving the degree of mechanization in stamping production is an important task to prevent accidents

1. Injury analysis of stamping operation

the causes of injury accidents caused by stamping operation include five factors: personnel, equipment, mold, process and environment

(1) people are the central link to achieve safe production

stamping production is a continuous and repeated operation, and most small and medium-sized enterprises basically adopt manual operation. Due to the requirement of high speed and high production efficiency, a shift must repeatedly send and take products by hand thousands of times, which is a great physical consumption. Working for a long time, it is easy for operators (especially young workers) to be paralyzed, resulting in mistakes and accidents. At the same time, leaders at all levels have improper production organization arrangement, lax safety production rules and regulations, poor safety management, command against rules, and do not pay attention to safety production. In addition, operators operate against rules, take chances, be impatient, arrogant and rash, as well as large stamping machines operated by multiple people. If the cooperation is not coordinated enough, accidents are likely to occur

(2) impact of stamping equipment on safety production

stamping equipment has a great impact on safety production. For example, the punching machine itself has defects, which are expected to reduce the cost effectively, the lack of safety protection devices, the lack of flexibility and reliability of clutches and brakes, the sudden out of control of electrical control structure and the occurrence of continuous punching, as well as the defects of accessory tools, are all important causes of accidents

(3) the influence of unsafe factors in stamping dies on safety production

the unsafe state of dies is directly related to the personal safety of operators and the normal progress of stamping production. If the convenient safety tools are not considered in the process of stamping die structure design, and the convenient safety factors such as feeding, ordering, discharging and waste cleaning are not considered as much as possible, the operator's hands will stay in the closed area of the die for too long, which is bound to cause accidents. Therefore, it is very important to design the mold scientifically and safely

(4) impact of process documents on safety production

process documents are not only the basis for production, but also an important basis for implementing process discipline. The typical document recording the stamping process is the process specification, which should include the whole process from the preparation of raw materials to the stamping of finished products

however, there is a serious loophole in the process documents, that is, most of the process documents do not clearly indicate the relevant provisions such as safety requirements and safety technical measures. In addition, the existing stamping safety regulations are not perfect. For example, the regulations formulated by the factory generally include all stamping parts. Although it can reflect the commonness of stamping processing, it can not reflect its characteristics. The regulations often only include "generally use safety tools" and "do not put your hand into the mold for operation" in general, but there are no specific technical measures for the different characteristics of each part. As a result, in the actual production process, there is a long-term situation of putting your hand into the mold for operation, which makes the safety management a mere formality. The operator ignores the use of safety devices and tools and takes risks to operate, resulting in accidents

(5) impact of environment on operators

the impact of stamping environment on operators is also very important. For example, the operation site is narrow, the products are not stacked neatly, the operation site is lack of light, the ventilation is poor, and the noise and the ambient temperature are too high or too low, which will lead to accidents

2. Preventive measures for stamping accidents

based on the above analysis, there are many preventive measures to prevent stamping accidents. Firstly, safety management measures must be strengthened, and secondly, safety technical measures must be taken, neither of which is indispensable

(1) safety management measures for stamping operation

the safety management of stamping operation is a comprehensive work, which requires not only technical measures, but also strict and sound management methods. The safety management of stamping operation involves the management of process, mold and equipment (including safety devices), production plan management and safety technology education management. If the process discipline is not strict, the mold management is poor, there are many hidden dangers of equipment accidents, the production organization is unqualified, the safety operation level is low, and the discipline is lax, injury accidents will continue to occur

actively carry out safety evaluation activities. Carry out safety evaluation activities, establish and improve safety production rules and regulations, especially the implementation of "safety production system", so that each employee can clarify their own safety responsibilities, strictly implement the stamping safety operation procedures, strengthen safety management, and eliminate accidents

it is an extremely effective way to reduce stamping accidents to do a good job in safety education for employees. Enterprises often carry out safety thought and safety technology knowledge education for employees, so that stamping workers, technicians and production management personnel can firmly establish the idea of safety first, and master the safe operation technology of stamping equipment, dies and protective devices, so as to avoid and reduce accidents

it is very necessary to strengthen the safety management of stamping process and incorporate the safety technical measures and requirements into the process documents. It can not only ensure the implementation of various safety technical measures and achieve effective safety production, but also clarify the safety production system of process technicians. For example, if the safety production status, number, equipped safety tools and safety devices, name and number of the die are indicated on the process card, and specific and clear process documents are used as the production basis, accidents caused by lack of rules or unclear process discipline can be effectively prevented

in addition, the process technicians must often understand and master the problems existing in the production process, and constantly improve the process and technical methods

in the management process of stamping dies, first of all, they must be checked and maintained frequently, and then the dies must be distinguished by color codes according to the degree of threat to personal safety. For example, red represents dangerous mold, yellow represents safe mold, green represents automatic mold, etc

in the safety management of stamping equipment, the equipment maintenance system should be formulated first to ensure the regular maintenance of equipment and safety devices. Before operation, the operating system, safety devices, electrical appliances and main fasteners of the equipment must be carefully checked to observe whether the operation is normal. It is strictly prohibited to operate the equipment "with faults"

in the production management process of stamping operation, it is necessary to strengthen production planning and scheduling, and reasonably formulate production plan according to product structure and production scale

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