What are the stamping safety production technologies?

We explain what stamping is. So what is the stamping safety production technology? Stamping (shearing) refers to the forming processing method of applying external force to plates, strips, pipes and profiles by presses and dies to produce plastic deformation or separation, so as to obtain the workpiece of the required shape and size "stamping parts".

Sheets, dies and equipment are the three elements of stamping processing. According to the stamping processing temperature, it is divided into hot stamping and cold stamping. A machine that uses a metal die to separate or deform steel or blanks is called a stamping machine.

Stamping (shearing) machinery and equipment include shearing machines, crank presses and hydraulic presses. According to the analysis of the causes of the accident, the dangers in the stamping operation mainly include the following aspects: (1) the danger of the equipment structure.

A considerable part of the stamping equipment uses a rigid clutch. This is the use of a cam mechanism to engage or disengage the clutch, once the engagement is running, it must complete a cycle before stopping. If the hand cannot be removed from the mold in time during this cycle, it will inevitably cause an injury to the hand.

2) Out of control. The equipment will also be subjected to frequent strong shock and vibration during operation, which will deform, wear and even fragment some parts, causing the equipment to move out of control and cause dangerous continuous rush or accidents. (3) The switch is out of order.

The switching control system of the equipment malfunctions due to human or external factors. (4) The danger of the mold. The mold is responsible for the main function of processing and forming the workpiece, and is the concentrated release of the energy of the whole system.

Because the mold design is unreasonable or defective, and the safety of the operator is not taken into account when it is used, the hand must be directly or frequently inserted into the mold to complete the operation during operation, thus increasing the possibility of injury. Defective molds can be caused by accidents under normal operating conditions due to wear, deformation, or damage. In stamping operations, stamping machinery and equipment, molds, and operation methods have a great impact on safety.

Stamping accidents may occur in various dangerous parts of stamping equipment, but most of them occur between die strokes, and the injury parts are mainly the operator's hands, and when the operator's hands are in the die strokes, the module falls, which will cause punching accidents. This is an accident caused by equipment defects and human behavior errors. The personnel involved must be aware of the hazards of the stamping operation.

In addition to technical measures, management measures must also be taken at the same time to achieve the safe production of stamping operations, and both are indispensable. In the past, in order to prevent stamping machinery injury, many safety protection devices and safety tools have been developed, and certain results have been achieved, but there is little effect in promotion and application. This is mainly due to poor management measures, with devices and tools, but the operator will not use them correctly or are unwilling to use them, and the equipment is broken and no one repairs it, so it cannot really play a role.

It can be seen that the implementation of stamping safety technical measures must be guaranteed by management measures, otherwise it is difficult for technical measures to play a role. Stamping operations have the characteristics of greater danger and frequent accidents, and the injuries caused by accidents are generally more serious, so a considerable number of stamping operators are afraid in the production center, and the psychological burden is heavier, which has a great impact on the safety of the operation. The dangers in stamping operations are mainly as follows:

A considerable part of the stamping equipment uses a rigid clutch. This is the use of cam mechanism to engage or disengage the clutch, once the engagement runs, it must complete a full loop, will stop, if the hand can not be withdrawn from the mold in time in this cycle, it will inevitably occur hand injury accident. When running with illness, the equipment will also be subjected to frequent strong impact and vibration during operation, which will deform, wear and even fragment some parts, causing the equipment to move out of control and cause dangerous continuous flushing or accidents.

As far as we know, when we want to know what is stamping safety production technology, we must first understand what stamping is, stamping is a forming processing method that relies on presses and dies to apply external force to plates, strips, pipes and profiles, etc., so that they can produce plastic deformation or separation, so as to obtain the required shape and size of the workpiece (stamping part). Stamping and forging belong to plastic processing (or pressure processing), which is collectively called forging. The stamped blanks are mainly hot-rolled and cold-rolled steel plates and strips.

60 70% of the world's steel is sheet, most of which is stamped into a finished product. The body, chassis, fuel tank, radiator sheet of the automobile, the steam drum of the boiler, the shell of the container, the iron-core silicon steel sheet of the motor and electrical appliances are all stamped and processed. There are also a large number of stamping parts in instruments and meters, household appliances, bicycles, office machinery, household utensils and other products.

Stamping processing is a production technology that uses the power of conventional or special stamping equipment to make the sheet directly subject to deformation force in the mold and deform, so as to obtain a certain shape, size and performance of the product parts. Sheets, dies and equipment are the three elements of stamping processing. According to the stamping processing temperature, it is divided into hot stamping and cold stamping.

The former is suitable for sheet metal processing with high deformation resistance and poor plasticity; The latter is carried out at room temperature and is a common stamping method for thin sheets. It is one of the main methods of plastic processing (or pressure processing) of metals, and is also subordinate to material forming engineering technology. The die used in stamping is called a stamping die, or die for short.

A die is a special tool for batch processing materials (metal or non-metal) into the required punching parts. Stamping dies are very important in stamping, and without stamping dies that meet the requirements, mass stamping production is difficult to carry out; Without advanced stamping dies, advanced stamping processes cannot be achieved. The stamping process and the die, the stamping equipment and the stamping material constitute the three elements of the stamping process, and only when they are combined with each other can the stamping parts be obtained.

In the stamping parts processing plant, it is necessary to use stamping protection tools to take certain protective technical measures for stamping operations;

In the stamping process, use protective tools to put the product blank into the mold and take out the stamped products and waste materials to achieve out-of-mold operations and avoid putting your hands directly into the mold.

1. Protection of the working area of the stamping die in the stamping parts processing plant.

1. Install guards around the stamping die.

2. Reasonable design of the mold is to reduce the dangerous area of the stamping die.

3. Design automatic or mechanical feeding.

Second, the stamping parts processing plant to the punching machine protective measures.

1. Push hand type. This is a kind of protection device that is linked to the punch slider and pushes the worker's hand away from the die through the swing of the baffle.

2. A pendulum gauntlet. It is a device that uses the principle of a lever to pull your hand apart.

3. Handle guard. It is a device that uses pulleys, levers, and ropes to link the worker's hand movement with the movement of the slider.

in the number of production per minute.

10. In the case of hundreds of stamping parts, in a short period of time to complete the process of feeding, stamping, discharging, waste discharge, etc., often occur personal, equipment and quality accidents. Therefore, safety in production in stamping is a very important issue. The safety measures for stamping are:

Realize mechanized and automatic feeding and discharging. Set up mechanical guards to prevent hand injury. Mold guards, automatic strippers and hand tools are used for loading and unloading.

Electrical protection and power-off devices are installed. Set up photoelectric or air curtain protection switches, two-hand or multi-hand series start switches, anti-misoperation devices, etc. The clutch and brake structure are improved, so that the crankshaft, connecting rod and punch of the press can stop in place immediately after the danger signal is issued.

1) Safety start device: its functional feature is that when the operator's limb enters the danger zone, the clutch of the press can not be closed, or the block can not go down, only when the operator's limb completely exits the danger zone, the press can be started to work. This outfit includes:

Double-handle coupling device and double-button coupling device. The principle of this facility is that when operating, the operator must start the switch with both hands at the same time, so that the press can be connected to the power supply and start working, which ensures safety from the front.

2) mechanical protective equipment 1 is characterized by trying to separate the danger zone from the operator's hand when the slider goes down, or pulling the operator's hand out of the danger zone with a forced method, so as to ensure safe production. This type of protective equipment includes: protective plates, pusher-type protective equipment, and handle safety devices.

The mechanical protective loading dish has a simple structure and is convenient to manufacture, but it has a great impact on the interference of the operation.

3) Automatic protection device: its functional feature is to set up beam, air flow, electric field, etc. around the dangerous area of the die. Once the hand enters the danger zone, the press will automatically stop working through light, electricity and air control.

At present, the commonly used automatic protection equipment should be photoelectric protective basin. The principle is to set up a light emitter and a light receiver in the danger zone. One or more rays of light are formed.

When the operator's hand mistakenly corrects the lead danger zone, the light is blocked, so that the light signal is converted into an electrical signal through the photocell, and the electrical signal is amplified and locked with the start control line, so that the slider of the press stops working immediately, so as to play a protective role.

At present, the commonly used safety protection devices of stamping machinery are: safe start device, mechanical protection device and automatic protection device. (1) Safe starter grinding posture:

Its functional characteristics are that when the operator's limb enters the danger zone, the clutch of the press can not close the first hound, or the block can not go down, and only when the operator's limb completely exits the danger zone, the press can be started to work. This assembly includes: a double-handle coupling and a dual-button coupling.