Precautions when using the grinding wheel

Author：newanhua　　Release date：2017/1/6 10:37:08

The use of grinding wheel has a certain risk. For your safety, the following list of precautions in use:

Grinding machine is one of the most commonly used machine equipment factory, it is installed is reasonable, whether in line with safety requirements; its use is correct, consistent with safe operating procedures. These issues are directly related to the personal safety of each employee, so in actual use must cause us enough attention.

Installation Precautions

Installation of the first wheel of the safety and quality testing, methods, with Nepalese velvet hammer (also can pen) tapping wheel side, the sound is crisp no problem.

Positioning problem Grinding machine installed in what position, is our installation process must first consider the problem, only selected a reasonable and appropriate location, we can carry out other work. Grinder prohibit the installation is in the vicinity of the nearby equipment and operating personnel or often people in the past, generally larger workshop should be set up a dedicated grinding wheel room. If you can not set a dedicated grinding wheel room due to the limitation of the plant topography, the protective baffle should be installed on the front of the grinder at a height of not less than 1.8m, and the baffle is firm and effective.

Balance problem Wheel imbalance is mainly caused by the grinding wheel manufacturing and installation is not accurate, so that the wheel center of gravity and the rotary shaft does not coincide caused. Imbalance caused by the damage mainly in two ways, on the one hand when the wheel rotation at high speed, causing vibration, easy to cause the workpiece surface polygonal vibration marks; the other hand, the uneven acceleration of the spindle vibration and bearing wear, serious When the wheel will cause the rupture, and even cause accidents. Therefore, the requirements of the straight is greater than or equal to 200mm sand office building should be installed after the static balance of the wheel, grinding wheel after shaping or found in the work imbalance should be repeated static balance.

Matched problem matching mainly refers to the chuck and wheel supporting the installation of the problem. According to standard requirements, grinding wheel chuck diameter shall not be less than 1/3 of the diameter of the installed disc, and the corresponding provisions of the wheel wear to diameter 10mm larger than the chuck should be replaced with a new wheel. So there is a chuck and grinding wheel matching, otherwise there will be such a situation, "big horse car" caused by the waste of equipment and materials; "small horse cart" does not meet safety requirements, could easily lead to personal accident. Therefore, the chuck and wheel reasonable match, on the one hand can save equipment, cut about the material; the other hand, in line with safety requirements. In addition, between the wheel and the chuck should be installed in diameter greater than chuck diameter 2mm, thickness of 1mm ~ 2mm cushion.

Protection problem The protective cover is the most important protection device of the grinder, its role is: When the wheel in the work for some reason, can effectively cover the grinding wheel debris, to ensure the safety of personnel. The shape of the wheel shield round and square two, the maximum opening angle does not allow more than 90 °; shield material for tensile strength of not less than 415N / mm2 of steel. Replace the new wheel, the protective cover to install a solid and reliable, and shields are not free to disassemble or discard do not.

The screen is one of the main protective accessories of the grinder, the shield above the horizontal plane in the spindle is greater than or equal to 30 (this device must be installed.) Its main function is to block the grinding process of flying quietly, It shall be installed at the positive end of the opening of the protective cover, the width of which shall be greater than the width of the wheel guard and shall be securely fastened to the protective cover, in addition, the clearance between the circumferential surface of the grinding wheel and the baffle shall be less than 6mm.

Bracket problem bracket is one of the commonly used accessories wheel, according to the provisions of the wheel diameter of 150mm or more grinder must be set adjustable bracket. The distance between the grinding wheel and the bracket should be less than 1/2 of the minimum dimension of the workpiece to be ground, but the maximum should not exceed 3mm.

Grounding problem Grinding machine use power lines, so the equipment shell must have good grounding protection device. Which is easy to cause an accident one of the important factors.

Precautions for use

Side grinding problem:

In the daily use of the grinder, we can often find some operators regardless of the type of grinding wheel, regardless of the type of grinding wheel, casually on the use of the grinding wheel side, which is a serious violation of safe operation of illegal operations behavior. According to the regulations with the circular surface to do the work surface of the wheel should not use the side of the grinding, the radial strength of the wheel, axial strength is very small, the operator force is too large will cause grinding wheel broken, or even hurt, in actual The use of this process should be prohibited.

Frontal operational issues:

In daily use, many operators are accustomed to the wheel is operating, because this direction can be used on the strength, in fact, this behavior is the wheel drive operation should be specifically prohibited behavior. According to the operating procedures, the use of grinding wheel grinding workpiece, the operator should stand on the side of the wheel, not in the front of the wheel to operate, so as to avoid grinding wheel, grinding wheel flying out or wreck.

Hard operation problem:

In the use of the grinder, some operators, especially young operators, for the sake of grinding speed, excessive force too much, this is a very unsafe operating behavior. Any wheel flat body has a certain strength, doing so is likely to cause grinding wheel broken, or even fly out of wounding, is also a prohibited behavior.

Common operational issues:

In the actual day-to-day operations, there are also such a situation, some people in order to catch production tasks, grab the working hours, the two share a wheel at the same time operation, which is a serious violation of operating behavior should be strictly prohibited. A grinding wheel is not enough time, you can use the grinding wheel to add the solution, absolutely not allowed to share a grinding machine.

Replacement Precautions

Wear problem:

Any grinding wheel has its use of certain wear requirements, wear to a certain extent must be re-replaced with a new wheel. Not in order to save material, the requirements on the use of ultra-wear, which is a very unsafe illegal behavior. General provisions, when the wheel wear to diameter 10mm larger than the chuck should be replaced when the new wheel.

Validity Issue:

From the warehouse out of the new wheel is not necessarily a qualified grinding wheel, and even from the manufacturers to buy a new wheel is not necessarily qualified grinding wheel. Any grinding wheel has a certain period of validity, in the validity period, it is qualified grinding wheel; more than the validity of use, not necessarily qualified grinding wheel. The regulation stipulates that "the grinding wheel should be used within the validity period, the resin and rubber bonded wheel must be rotated for one year after storage, and the qualified person can use it".

Texture problem:

In the course of the process, if the local cracks found in the wheel, should immediately stop using, re-replacement of the new wheel, so as not to cause broken wheel injury wounding.

Other matters needing attention

Environmental issues:

Grinding wheel machine should generally be set up special grinding wheel room, and is strictly prohibited in the grinding machine room or grinding machine near the stack of flammable and explosive materials, in order to avoid fire or explosion accidents, should not be placed in the wheel near the other parts or items.

Management issues:

Grinding wheel should be responsible person, where non-unit personnel want to grind on the grinding wheel object, subject to full-time person in charge permission, and strictly comply with safe operating procedures, is strictly prohibited without the consent of the staff, unauthorized use of wheel. In addition, the wheel should also be replaced by someone responsible for prohibiting unauthorized replacement, installation of grinding wheel.

Turn off the car problem:

Operators to stop working immediately after the car. It is forbidden to idle the wheel in unattended, unattended condition. In addition, after use should be maintained in the short wave turbine cleaning.