What are the requirements for safe operation of sawing?

What are the requirements for safe operation of sawing? Clamping of workpiece

The workpiece should be firmly clamped and not shaken to prevent the saw blade from breaking when the workpiece moves during sawing. At the same time, it is also necessary to prevent the machining surface from being clamped and the workpiece from being deformed.

The workpiece is clamped on the left side of the vice as far as possible for easy operation; The sawing line should be perpendicular to the jaw to prevent sawing; The sawing line should not be too far away from the jaw to prevent jitter during sawing.

Start sawing things

There are two kinds of sawing methods: far edge sawing and near edge sawing. Generally, far-edge sawing is adopted. Because the sawtooth cuts into the material step by step and is not easy to get stuck, it is more convenient to start sawing. The suitable starting angle α is about 65438+05. In order to position the saw correctly and stably, the left thumb can be used to block the saw blade for positioning. When sawing, the pressure should be small, the round trip should be short and the speed should be slow, so that sawing can be stable.

3. Normal sawing

When sawing, naturally hold the saw bow, hold the handle with your right hand and apply force forward, and put your left hand on the front end of the bow frame and apply a little force. The weight of the human body is evenly distributed on the legs. When sawing, the speed should not be too fast, 30 ~ 60 times per minute is appropriate, and two-thirds of the total length of the saw blade should be used to avoid the middle part of the saw blade from becoming dull quickly.

There are two ways to move the saw bow when pushing the saw: one is linear motion, which is suitable for thin-walled workpiece with flat saw groove and bottom surface; Another saw bows up and down? Move, so that the operation is natural and the hands are not easily tired.

When sawing to the point where the material is about to break, use light force to avoid hurting the arm or breaking the saw blade.

4. Sawing example

When sawing round steel, in order to get a neat saw seam, we should start sawing and end sawing in one direction. If the requirements for cross section are not high, the sawing direction can be gradually changed to reduce the resistance and facilitate cutting.

When sawing a round pipe, generally, the round pipe is horizontally clamped in a vice, and the thin pipe or finished pipe should be clamped between wooden mats. It is not recommended to saw the end of the pipe from one direction. Stop when it reaches the inner wall of the pipe, then rotate the pipe in the direction of pushing saw, and still saw according to the original saw seam, and turn it over continuously until it is sawed off.

When sawing a thin plate, in order to prevent the vibration and deformation of the workpiece, wood boards can be clamped on both sides of the thin plate for sawing.

5. Operational considerations

1. Check the clamping direction and tightness of the saw blade before sawing;

2. When sawing, the pressure should not be too high and the speed should not be too fast, so as to avoid the blade breaking and hurting people;

3. When sawing is about to be completed, don't use too much force, and hold the sawed part with your left hand to avoid hitting your feet when falling.

I hope this helps.

What safety requirements should be met when operating a circular saw? What are the safety operation procedures for circular saws? Presumably, everyone is not familiar with the word "what is the safe operation procedure of circular saw", and I don't know what its general meaning is. Now let's find out. What are the safety operation procedures for circular saws? There are several points to note: when we were in college, the teacher often said that the safety operation rules of circular saws are just in use now. Share it with everyone! (1) Before using the circular saw, check the saw blade and tighten the screws. (2) When operating, wear protective glasses, stand on one side of the saw blade, do not stand in a straight line with the saw blade, and do not cross the arm with the saw blade. (2) The short and narrow materials shall adopt push rod, and the receiving materials shall adopt planer hook. It is forbidden to saw wood exceeding the diameter of the saw blade. (1) Check the saw blade and tighten the screws before operation. (2) Wear protective glasses when operating, stand on one side of the saw blade, do not stand in a straight line with the saw blade, and do not cross the saw blade with your arms. (2) Push rod for short and narrow materials, and planer hook for receiving materials; It is forbidden to saw wood exceeding the diameter of the saw blade. (4) The feed must be close to the backer, and excessive force is not allowed. In case of induration, push it slowly until the material reaches the saw blade1~ 5cm. It is not allowed to pull it by hand. The above are commonly used, some common sense collected, I hope to help everyone. If you are satisfied, you can also share it with your friends!

What are the requirements for safe operation of corn harvester? 1. Before the corn harvester is operated, roads and fields should be surveyed, and dangerous areas and obstacles should be clearly marked.

2. When maintaining, overhauling and troubleshooting the corn harvester, it is necessary to cut off the power supply and turn off the engine; When mechanical maintenance or overhaul is carried out under the header of the corn harvester, the header of the corn harvester must be lifted and firmly supported by a safety bracket or safety pad, and it can only be carried out after it is confirmed to be safe; When maintaining machinery or adding fuel at night, it is forbidden to use open flame lighting.

3. When unloading grain, people are not allowed to enter the granary, tools such as iron are not allowed to reach into the granary, and grain collectors are not allowed to reach into the grain outlet.

4. When the block is transferred, lift the header of the corn harvester to the highest position and lock it. It is forbidden to use the cutting table of corn harvester to carry goods.

5. Check whether the seat and backrest of the dish receiver are firm and reliable at any time.

What are the requirements for the safety operation procedures of spot welding machines? The safety operation procedure of electric welding machine is as follows:

First, oil and dirt must be removed before work, otherwise the service life of covered electrode will be seriously shortened and the welding quality will be affected.

Second, after the electric welding machine is electrified, check whether there is any leakage phenomenon in the electrical device, operating mechanism, cooling system, gas circuit system and body shell.

3. Before starting the welding machine, turn on the changeover switch of the control circuit and the small switch of welding current, put the cutter position of the series adjustment switch in place, turn on the adjustment buttons on the water source, gas source and control box, and finally turn on the power supply to start working.

Four, electrode contact should be kept bright and clean, if necessary, fine file or emery cloth can be used to repair the light.

Five, welding machine bearing hinge and cylinder piston, liner ring, etc. It should be lubricated regularly.

Six, welding machine work, gas system, water cooling system should be smooth. The gas must be kept dry and must not contain moisture. The drainage temperature does not exceed 40℃, and the drainage flow can be adjusted with the seasons (smaller in winter and larger in summer).

Seven, when the welding machine stops working below 0℃, the water stored in the cooling system must be blown away with compressed air to prevent the pipeline from freezing or blocking.

8. The working stroke of the upper electrode is realized by adjusting the two nuts under the cylinder body. After adjustment, it must be tightened.

Nine, the electrode pressure can be adjusted by rotating the handle of the pressure reducing valve according to the requirements of welding specifications.

Ten, in order to avoid damage to the ignition tube and selenium rectifier, it is strictly prohibited to increase the fuse in the ignition circuit.

Eleven, when the load is too small to make the ignition tube can't arc, it is forbidden to close the ignition circuit of the control box, because the ignition circuit can't be shunted by arc at this time, so the ignition tube and selenium rectifier are easily damaged when the ignition circuit is closed.

Twelve. The circuit device of the control box is complex, so attention should be paid to protecting the circuit facilities from being damaged by touch. When the temperature is low in winter, thyratron and igniter are not easy to ignite. The indoor temperature should not be lower than 65438 05℃.

Thirteen, after the welding machine stops working, it is necessary to remove debris and spatter welding slag.

Fourteen, electric welding machine to stop working, should first cut off the power supply, gas source, and finally turn off the water.

15. When the welding machine is shut down for a long time, it is necessary to apply antirust grease to the unpainted moving parts to prevent the parts from rusting.

16. If the control box is stopped for a long time, it should be electrified and heated for 30 minutes every month to prevent moisture from soaking in, and the thyratron should be preheated for 30 minutes when it is replaced. During normal operation, the preheating time of the control box shall not be less than 5 minutes, otherwise it is easy to produce arc back or out of control.

I hope it helps you. I saw the website you mentioned. It's good. The information and the things on the forum are quite complete. Good luck. LZ chooses me as the best! thank you

Rules for safe operation of cutting saws Rules for safe operation, use and maintenance of horizontal band sawing machines

In order to ensure the personal safety of operators and prolong the service life of sawing machine and saw blade, the company formulates the following regulations, which operators must strictly abide by:

1, wear tight protective clothing before operation, with cuffs fastened and under the coat? Don't open it, don't wear gloves, don't put on or take off your clothes, and don't wrap it around the running machine tool to prevent the machine from being twisted.

2. Make all preparations before starting the machine (check the circuit, oil circuit, oil level and saponification water level to keep all parts normal), install a vise, and make the sawing center in the middle of the sawing stroke. The raw materials are placed horizontally in a vise at right angles to the saw blade; If you want to saw bevel materials, first adjust the vice to the required angle, and the sawing size shall not be greater than the maximum sawing size of the machine tool.

3. When installing a new saw blade, the tension should be controlled between 25 and 35 nm. In order to improve the use effect of the saw band, each time a new saw blade is replaced, it should be run-in, that is, the first few knives should be cut at low speed and small feed, and then cut according to the normal cutting parameters (the cutting speed of carbon steel should be controlled between 45 and 90 (m/min)).

4. The saponified liquid used in the sawing machine should be thickened, and a large amount of saponified water should be produced in the cutting process, and the chips should be removed in time, so as not to block the sawtooth and affect the cutting effect and the service life of the saw belt.

5. If the saw blade breaks during use, after installing a new saw blade, the uncut steel should be turned over before cutting. If the saw blade is not turned over and cut according to the old kerf, it is easy to break again. Saw a large steel saw blade, the sawtooth should be larger, and saw a small steel saw blade, the sawtooth should be thinner. Any broken saw blade should not be used on the automatic sawing machine.

6, every day after work, to relax the band saw blade, in order to improve its service life. Wipe the machine tool, keep the parts of the machine tool clean and improve the civilized production level.

What are the requirements for safe operation of the hoist? 1, the wire ropes on the drum should be arranged neatly. If overlap and oblique winding are found, stop the machine and rearrange it. Hands and feet are prohibited from stepping on the wire rope during rotation. Wire rope is not allowed to extend, at least three turns should be reserved.

2. The wire rope is not allowed to be knotted or twisted. If the broken wire exceeds 10% within a pitch, it should be replaced.

3, homework, no one may cross the wire rope, objects (objects) after ascension, the operator shall not leave the hoist. When resting, the object or hanging cage should be lowered to the ground.

4. During operation, drivers and signals should keep good visibility with the hoisted objects. Drivers and signalmen should cooperate closely and obey the unified command of signals.

5. In case of power failure during operation, cut off the power supply and lower the lifted object to the ground.

Niu Ba holds up Chinese Pinyin.

What are the safety operation procedures for intermediate chain saws? Chain saw, also known as chain saw, is a portable saw driven by gasoline engine, which is mainly used for logging and wood making. Their working principle is to cut through the transverse movement of staggered L-shaped blades on the saw chain.

Chain saw is a kind of demolition equipment, which can be divided into motorized chain saw, non-motorized chain saw and concrete chain saw according to its function and driving mode.

What are the requirements for the safe operation of sewage treatment plants? 1. Operators and maintenance personnel in each position must undergo technical training and production practice, and can only take up their posts after passing the examination.

2, start the device should be ready to start.

3. When the power supply voltage is greater than or less than 5% of the rated voltage, it is not appropriate to start the motor.

4, the operator when opening and closing the electrical switch, must be carried out in accordance with the electrician operation procedures.

5, all kinds of equipment maintenance must cut off the power supply, and should be hung in the switch maintenance signs, before operation.

6. In rainy and snowy weather, operators should pay attention to anti-skid when patrolling or working on buildings.

7. When cleaning and maintaining the water-collecting regulating pool, it must be ventilated. The operation can only be started after the content of harmful gas meets the requirements and it is proved that there is no danger.

8. When cleaning the electromechanical device and the surrounding environment, it is forbidden to wipe the running part of the device, and the washing water shall not splash on the live part and lubricating part of the cable head and motor.

9. Operators in each position should wear complete labor protection articles and do a good job in safety prevention.

10, it is forbidden for non-post personnel to switch the electromechanical equipment of this post.

1 1, workshops with electrical devices and inflammable and explosive places should be equipped with fire-fighting equipment according to the relevant regulations of the fire department.

What are the safe operations of locksmith? When clamping the workpiece with a vice, it should be firmly clamped and the handle should be close to the end.

The hammer must be firmly assembled, and whether it is loose should be checked frequently during use.

Use a hammer. When there are people around, avoid them at any time to avoid hurting people.

Control the flying direction of the chip when chiseling, so as not to hurt people.

It is forbidden to use files, shovels and scrapers without handles to avoid hurting hands.

A protective net should be set on the fixture workbench, and the chips should be swept clean with a brush when working. You can't wipe the chips with your hands or blow them with your mouth.

When drilling, hands are not allowed to touch the spindle and drill bit of the drilling machine, gloves are forbidden to operate, and sleeves and hair are prevented from being caught.

The fitter's tools and measuring tools should be placed in the proper position of the workbench to avoid falling off and being damaged.

The work site should be kept clean and tidy, the aisles should be unobstructed, and the blanks and parts should be neatly stacked.