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What should be paid attention to in the blade clearance of the numerical control plate shearing machine and the operation details of the plate shearing machine?

In order to improve the processing quality of the CNC plate shears, a reasonable blade clearance must be selected according to the plate to be cut. Generally, it can be selected according to the following principles:

1. the low carbon steel with tensile strength of 375 ~ 460Mpa and elongation of 25% is taken as the benchmark, and the gap is selected as 10% of the thickness of the sheared plate.

2. for medium and high carbon steels with low elongation, the blade clearance value shall be larger than that of equivalent low carbon steels, which can be selected between 10% and 15% of the plate thickness.

3. for stainless steel with high elongation and tensile strength, the blade clearance should also be determined according to the elongation. The blade clearance should be appropriately adjusted to be about 6% ~ 6.5% of the thickness of the cut plate.

In short, for materials with good shear toughness, the blade clearance is slightly smaller than that for low carbon steel; On the contrary, when cutting brittle materials, the gap should be slightly larger. Of course, the above is the preliminary clearance value during shearing, which can be slightly adjusted according to experience after seeing the quality of the shear section after shearing.

So that we can deepen and expand on the original basis, so that we can better understand the product. At the same time, we can add some knowledge in this area to increase our knowledge and prepare for future use.

1. commissioning and operation

(1) After the hydraulic sheet metal bending machine is installed and calibrated, it shall be lubricated with lubricating oil to make it fully lubricated.

(2) Check whether the fastening bolts at the joint are loose. If so, tighten them in time.

(3) Clean the oil tank and check the filter screen for any problems.

(4) Check the electrical components. If there is any problem, deal with it in time. If there is no problem, you can turn on the power supply, and then start the motor to check whether the steering of the oil pump is correct. If the steering is correct, let it idle for about three minutes.

(5) All electrical and hydraulic components shall be checked for normal operation.

2. maintenance

(1) The oil level of the oil tank shall be checked every week to see whether the oil level is too low and whether the hydraulic oil shall be supplemented.

(2) The system oil temperature shall be controlled within the range of 35 ℃ - 60 ℃. Excessive temperature will damage parts.

(3) The hydraulic components shall be cleaned every month to prevent dirt from entering.

(4) Check whether there are deformation and other abnormalities at the bend of each oil pipe, and replace it immediately if any.

What are the main details and precautions for the operation of the plate shears? The answer to this question is as follows:

1. Before starting the machine, set the upper and lower blades, adjust the material retaining device, and start working after 2-3 times of air shear.

2. The clearance between blades shall be determined according to the thickness of the sheared steel plate and shall not be greater than 1/30 of the thickness of the steel plate

3. The shear material must meet the requirements and shall not exceed the limit. It is forbidden to shear bar materials, quenched materials and materials with high performance.

4. One plate cutter is not allowed to cut two materials at the same time, and no one is allowed to stand behind the bending machine plate cutter to receive materials. During feeding, the fingers must be 20 cm away from the crossing, and special tools shall be used for small parts.

5. During operation, pay attention to whether the scissors and screws are loose.

6. Tools and workpieces are not allowed to be placed on the bed surface, and the cut iron scraps shall be stopped and cleaned in time.

7. When more than two people work, they should cooperate with each other and keep the same pace, and a special person should control the shear switch.

8. It is forbidden to cut the folded blanks.

9. After work, cut off the power supply and lock the switch box.

10. The mechanical plate shears must be managed by a specially assigned person to strengthen maintenance.