Hidden dangers and analysis of machine tool products

The machine tool is a mechanical device that integrates machine, electricity, liquid, and gas. It has many risk factors and produces a great degree of damage. Through the product inspection of these years, we discovered that the hidden dangers and problems of machine tool products are as follows:

One of the hidden dangers: workpieces, knives fly out of danger hidden machine is a high-speed machine.

When the spindle speed of the machine tool is low, the rotation speed is several hundred revolutions per minute. If the spindle speed is high, the speed is changed from tens of thousands to several hundred thousand revolutions per minute. Parts and/or tools that rotate at a high speed may fly out and cause personal injury or even death. Specifically, first, the clamping device of the workpiece or the tool is not firmly clamped, causing the workpiece or tool to fly out; second, the unprotected device or the protective device does not meet the requirements, and the workpiece or the tool that flies out cannot be protected; The necessary warning content for the user is missing on the product or in the technical file.

Hidden Trouble 2: The product is in danger of electric shock.

There are two kinds of electric shocks: direct contact and inter-contact: The live body that directly touches the dangerous voltage is the direct contact; the human body touches the original and is not electrified, and the live body that is charged due to the insulation failure of the electric device is the contact electricity. There is a danger of direct contact with the product. Normally, there is no protection for live power terminals, that is, the live terminals are exposed. The user is most likely to experience electric shocks during use or maintenance; there is a danger of electrical contact between the products. Usually, the electrical grounding system of the machine tool is not perfect. Protective grounding wire. The protective grounding wire is called “lifeline” and is very important to the operator. Once the insulation of the electrical components fails and leakage occurs, the safety of the personnel can be effectively protected, and its importance is self-evident.

Hidden Trouble 3: Emergency Stop Operators and Power Switch There is a potential safety hazard Emergency stop operation is extremely important for machine tool products. It is an electrical device that is specially designed to reduce the number of casualties or equipment damage when a machine tool accident occurs.

The standard requires that the emergency stop device has a specific purpose, no additional danger, easy operation, self-locking mechanism, and special red color. Products that do not have an emergency stop device or an emergency stop device do not meet the requirements of the standard. In an emergency or unexpected situation, they cannot be used to prevent personnel from being injured or prevent equipment damage. At present, some companies' products do not have emergency stop devices or emergency stop devices that do not meet the standard requirements. The power switch is an important device that connects the machine tool and the external power supply. The power switch on the machine tool is different from the general power switch. Besides the capacity (including rated voltage, current, short-circuit current, etc.) to meet the use requirements, it also requires the machine tool equipment and The safety of personnel plays a good role in protection. The standard stipulates that “the power switch should provide locking mechanism in the disconnected position” is this purpose. In order to reduce costs, some companies often use power switches that are not locked in the disconnected position, leaving security risks for the machine.

Hidden Trouble 4: The danger of rest can't be ignored.

The danger of standing mainly refers to the structure and appearance of the exposed parts of the product and its harm to humans. For example, sharp edges, sharp corners, and burrs of exposed emergency stop devices may cause scratches to people. The appearance of sharp edges, sharp corners, and burrs on the product not only gives the impression of a “rough product” but, more importantly, it can cause scratches or stabs to varying degrees on personnel (eg, operators). For example, the workbench is as sharp as a knife edge. Once the operator does not notice it, he will be scratched. Another example is the operator's chip baffle near the sharp corners, all at any time may be scratched.

Hidden danger 5: The product instruction manual is not standardized.

The product instruction manual is an important part of the product and is a guidance document that guides the user to operate the machine correctly and safely. However, there are many problems in the product specification of the machine tool, which are mainly manifested in the following aspects: First, the lack of safety precautions or incomplete content of safety precautions can not guide the safe use of the user and cause safety hazards to the user. For example, with a fast-positioning mobile workbench, there is a danger of collisions with personnel and a moderate risk that cannot be avoided in the design of the structure. In addition to the permanent warning signs near the dangerous parts, there must be similar text in the product specification. Warning; Second, the content in the product instruction manual is inconsistent with the product, causing inconvenience to the user for correct use and maintenance. If the circuit diagram of the product does not correspond to the actual product, if the machine tool fails, the user will have no way to deal with it, and they will have to go to the manufacturer. This undoubtedly brings inconvenience to the user. Third, there is no enterprise contact method or legal measurement unit, and the user is not Responsible.

Hidden danger six: product warning signs are incomplete.

The warning sign is also an important part of the product. Its purpose is also to enable the user to operate the machine correctly and safely. The warning sign is affixed to the product, which can be used to remind the user more intuitively. At present, some companies' products have the problem of incomplete warning signs, especially the lack of security tips for users, causing product safety hazards.