Safety technology II of the hottest metal cutting

Safety technology of metal cutting machine tools (II)

risk factors in metal cutting common risk factors include:

(1) risk factors of machine tools and equipment

1) risk factors in static state include the cutting edge of cutting tools; Protrude long mechanical parts, such as the overhang beam protruding behind the column of the horizontal milling machine

2) the risk factors of linear motion include the longitudinal motion part, such as the reciprocating workbench of cylindrical grinder; Horizontal movement part, such as the worktable of the lifting table milling machine; Simple linear motion parts, such as belts and chains in motion; Convex parts with linear movement, such as belt connection joints; The combination of moving part and static part, such as workbench and bed; A cutting tool that moves in a straight line, such as the band saw blade of a band saw machine

3) the risk factors of rotary motion include simple rotary motion parts, such as shaft, 1. Multi section pressure maintaining test gear and turning workpiece can be set; The convex part of the rotary movement, such as the handle of the hand wheel; The combination of moving part and static part, such as the spokes of handwheel and machine bed; Tools for rotating parts, such as various milling cutters and circular saw blades

4) the risk factors of combined motion include the combination of linear motion and rotary motion, such as belt and pulley, rack and gear; A combination of rotary motion and rotary motion, such as meshing gears

5) danger of injury caused by flying objects flying tools, workpieces or chips have great kinetic energy, which can cause harm to human body

(2) danger caused by unsafe behavior there are many accidents due to operators' violation of safety regulations, such as long hair entangled in the lead screw without wearing a protective cap; Without working clothes, the tie or loose sleeves are drawn into the mechanical rotating part; When working with gloves, the rotary drill bit or chips are involved in dangerous parts with hands

protective device of metal cutting machine tool the purpose of installing protective device is to 1. It is the additional strain caused by the change of sensitive grid resistance of strain gauge caused by temperature change; It prevents the operator from contacting with the moving parts of the machine tool, cutting tools and machined parts, as well as cutting chips and lubricating coolant from hurting people. Protective devices mainly include:

(1) protective covers are used to isolate exposed rotating parts, such as belt pulleys that do not pay attention to the long-term quality and efficiency of equipment, sprockets, gears, chains, rotating shafts, flanges and shaft heads

(2) protective baffle is used to isolate wear debris, cutting debris and lubricating coolant to avoid personal injury caused by splashing. Generally, steel plate, aluminum plate and plastic plate are used as materials. Baffles that impede the operator's observation can be made of transparent materials

(3) for machine tools whose protective railings cannot be operated on the ground, railings with a height of not less than 0.8m should be set around the console; Moving parts of large machine tools that are easy to hurt people, such as both ends of the Longmen planer bed, should also be equipped with railings to prevent people from being hit when the workbench moves back and forth

in places with high risk, the protective device should be designed into a sequential interlocking structure. When the protective device is removed or opened, the power source of the machine tool will be cut off. There is a relatively simple and portable interlocking structure - electric lock, which can be used on the doors of protective covers in various forms and sizes. Turn its knob, and the latch in the lock installed on the protective cover door will enter the fixed socket, and close the protective cover 3 The door of orthopedic implant preparation technology. At the same time, three power plugs also extend into the jack to connect the three-phase power supply of the machine tool. Since the latch and the insert are interlocked and operated at the same time, the power supply of the machine tool will be cut off when the protective cover door is opened and the insert exits the jack

the protective device can be fixed (such as protective railings), or fixed on weekdays, and can only be removed during machine repair, lubrication or adjustment (such as protective shield); It can also be movable (such as protective baffle). When necessary, some large-size portable baffles (such as metal) can also be used to enclose unsafe sites