Preparation before work
The. Familiarize yourself with the contents of the manual and understand the machine's main structure, operation method, and safety and maintenance precautions.
B. Clean the surface of the machine with anti-rust oil, which can be done with gasoline or kerosene, but without dissolving detergent.
w. Clean the oil tank before refilling. The oil tank must not contain impurities. Refill with new oil, hydraulic oil YB (c) -N32 or YB (c) –N46, filtered with a fuel dispenser whose filtration accuracy is not less than 5 μm, until the oil level is above four-fifths of the position indicated by the level gauge. Mobil AFT-25 hydraulic oil has the best effect after repeated testing. YB-N32 anti-wear hydraulic oil is recommended in low temperatures (about 5℃) in winter. Let the machine idle for a period of time and install a heater in the hydraulic system if necessary. The oil temperature in the hydraulic system under normal operation should not exceed 75℃. Install a cooler if the oil temperature is too high.
d. Add lubricating grease to all moving parts according to the manual. It is. Turn on the power supply, set the electrical panel switch to position “1”, do not start the oil pump motor, and check whether the hydraulic valves and relevant electrical components operate normally according to the various process specifications and modes of operation.
Machine operation
(1) Press the engine start button to start the main engine, check whether the direction of rotation of the engine is consistent with the direction of rotation on the oil pump label, and check the direction of rotation of the engine by observing the coupling.
If it's not consistent, stop immediately.
When changing the direction of the motor, professionals must cut the power and change the phase of the input line.
When there is air in the piping system, press the start and stop buttons alternately several times. After the air is discharged, the oil pump can enter normal operation.
(2) Detailed programming operation of the new product should be carried out after reading the electrical system operation manual and operation manual in detail.
Machine adjustment
The machine tool has been precisely adjusted and tested before leaving the factory. However, all adjustments may change during transportation. Therefore, the following checks must be made before formal use.
( 1) Blade gap adjustment:
The machine's blade clearance is automatically adjusted by the numerical control system. Proper adjustment of the blade gap will directly affect the shear quality of the sheet metal and the service life of the blade.
To obtain a high-quality cutting end face, a reasonable blade gap should be selected according to the material to be cut. The following methods are recommended for adjusting blade clearance.
Low-carbon steel with tensile strength σB = 370-400 MPa and elongation δ = 35% is used as the adjustment reference, and the blade clearance is selected according to 8% of the plate thickness. For medium and high carbon steels with low elongation, the blade clearance value should be greater than that of low carbon steels with the same thickness.
When shearing stainless steel plate, the gap of the blade depends on its elongation, and the stainless steel shearing blade must be used because the elongation of some stainless steels is greater than that of high-carbon steel with the same strength.
Attention:
a) After adjusting the blade gap, the machine must run empty at least once before formal cutting.
b) When cutting plastic materials, the blade clearance should be slightly smaller; When cutting fragile materials, the blade gap should be slightly larger.
c) After always adjusting the blade clearance, a test cut must be carried out.
( 2) Shear angle adjustment:
The cutting angle of the machine is automatically adjusted by the numerical control system.
The shear angle can be changed by adjusting the amount of oil in the upper chamber of the auxiliary oil cylinder.
Increasing the shear angle makes the workpiece easier to deform, while reducing it increases the likelihood of producing burrs.
Attention:
a) After each cutting angle adjustment, the machine must run empty at least once before formal cutting.
b) When the cutting requirements are not high, the minimum width of the narrow material that can be cut should not be less than 3 times the thickness of the board; otherwise, the blade may be damaged.
c) To obtain smooth shear parts without distortion and deformation, the minimum width of the shear plate should be more than 15 times the thickness of the plate, but not less than 80 mm.
d) The greater the width of the shear plate, the smaller the deformation.
( 3) Blade removal and installation
| No. | Name | No. | Name |
| 1 | Toolholder | 5 | pressing cylinder |
| two | Top blade | 6 | Front guardrail |
| 3 | Lower blade | 7 | Cover plate |
| 4 | Desktop | 8 | Adjusting screw |
The standard configuration of the machine's upper and lower blades is two pieces of knife splicing, which has the advantage of convenient grinding and does not require a special grinder.
The entire length of the upper and lower blades can be configured according to the user's needs.
a) Removing the blade
Start the machine, adjust the blade clearance to a maximum value of 0.64 mm, adjust the shear angle to 1.0°, make the tool holder move up and down for several cycles, close the machine tool and remove the protective fence and the cover plate of the pressing cylinder.
Remove the lower blade first:
Loosen all mounting screws on the two lower blades, hold one lower blade with a long wooden square at the back of the machine tool to prevent it from tipping backwards, remove the blade screws, and pull the blade away from the side of the machine tool. machine tool.
Remove the other blade in the same way.
Then remove the top blade:
Loosen all mounting screws of the two upper blades, place two suitable wooden squares between one upper blade and the workbench, and fix the upper blade. Remove the blade screws, slowly loosen the wooden squares, and pull the upper blade from the side of the machine tool.
Remove the other top blade in the same way.
b) Blade installation
The order in which the blade is installed is the reverse of the order in which the blade is removed.
Install the top blade first:
Insert two suitable wooden squares at one end between the tool holder and the workbench, insert a top blade into that end, hold it with two wooden squares, and install the screws into the blade loosely.
Then install another top blade in the same way.
Use these two squares of wood to press an upper blade upward to make the upper blade fully close to the mating surface of the tool holder's blade edge.
Then tighten the screws on the blade from the knife joint to the edge.
Tighten the blade screws on the other blade in the same way.
Then install the lower blade:
Insert two lower blades into both sides of the machine and hold the lower blade with a long wooden square at the back of the machine tool.
First, install all the screws, and then tighten the knife joint lower blade screws at both ends.
After installing the upper and lower blades, install the cover plate and protective fence one by one.
Attention:
a) When removing the blade, the blade becomes heavy and sharp. The operator must be very careful and wear gloves before operating.
b) The clamping force of the blade screw is 35N · M.
( 4) Blade Grinding
The blade must be ground regularly.
After the blade becomes dull, if it continues to be used, the outer grain structure of the blade will be damaged due to excessive pressure, which will not only damage the machine but also result in poor shear quality.
After grinding the blade, the outer layer grains can be removed.
The upper and lower blades of the machine have four cutting edges. Grinding is required when the blade fillet radius is greater than 0.25 mm.
The one-sided grinding amount is 0.5mm and the grinding margin of each blade is 4mm (2mm on one side).
If the blade grinding of commonly used plate shears is organized according to this method, the grinding amount will be the smallest and the service life will be the longest.
( 5) Blade gap uniformity adjustment
After the blade is ground or changed, the uniformity of the blade gap should be checked again and adjusted as follows:
a) Turn on the machine tool, adjust the shear angle to 0°, make the upper and lower blades parallel and adjust the blade clearance to a maximum value of 0.64 mm.
b) Turn off the oil pump and manually adjust the butterfly valve to 120 to make the tool holder slowly descend until the upper and lower blades coincide by 1-2mm along the entire length.
In other words, close the butterfly valve to ensure the tool holder does not slide down.
| No. | Item |
| 1 | Pressure Cylinder Control Valve 140 |
| two | Pressure Cylinder Pressure Reducing Valve 50 |
| 3 | Lower chamber support pressure measuring point |
| 4 | Pressure cylinder pressure measuring point |
| 5 | 70 Shear Angle Control Valve |
| 6 | Tool Rest Control Valve 60 |
| 7 | Throttle valve 120 |
| 8 | Main pressure measurement point |
| 9 | Lower Chamber Support Valve 80 |
| 10 | 20/30 Main Pressure Control Valve |
c) Open the electrical panel door, press and hold the AC 1KM2 contactor that reduces the blade gap, monitor the actual blade gap value through the handwheel page, adjust the gap between the upper and lower blades to a minimum of 0.08mm, and close the electrical panel door.
d) Loosen the thrust bolts and nuts on the two disc spring brackets, loosen the nuts on the four spacer adjusting bolts at the rear, and adjust the four adjusting bolts to make the distance from both ends of the upper blade to both ends of the upper blade. consistent bottom blade (when adjusting one end, the upper and lower adjustment screws need to be adjusted at the same time).
Measure with a feeler gauge; the gap should be between 0.05mm and 0.1mm.
Then, tighten the nuts on the four adjusting screws and the thrust screws and nuts on the two disc spring brackets.
| No. | Item |
| 1 | Turbo-worm reducer |
| two | Adjusting screw |
| 3 | Adjustment nut |
| 4 | Disc spring support |
| 5 | Gland |
e) Adjust the adjusting screw on the tool holder from left to right and check the edge clearance with a 0.05mm and 0.1mm feeler gauge. Make sure the 0.05mm feeler gauge can pass through, but the 0.1mm feeler gauge cannot.
f) After shutdown, restart the machine, adjust the shear angle to maximum and close the oil pump. Adjust the butterfly valve to 120 to make the tool holder slowly lower, and check that the blade clearance of each section is equal to the system's originally set clearance value.
If not, loosen the four adjustment screws on the back and adjust the blade gap to the same value as the system's originally set gap.
g) Re-tighten the locking sleeve on the potentiometer and adjust the position of the slack adjustment shift switch.
6) Back stop adjustment
| No. | Item |
| 1 | Lock-nut |
| two | Adjusting screw |
| 3 | Screw M8×30（GB70-85） |
| 4 | Screw M8×35（GB85-88） M8 Nut (GB6170-86) |
a) Angle adjustment
The angle of the rear stop positioning surface must be consistent with the travel angle of the tool holder. Otherwise, when the shear angle changes, the positioning surface of the backstop will change and the positioning of the backstop will be inaccurate.
When checking the angle of the rear stop locating surface, place a dial indicator on the walls on both sides of the machine and point the head toward the locating surface.
When the tool holder lowers, the dial indicator reading change should not be more than 0.05 mm.
If it is greater than 0.05mm, adjust screws M8×30 (GB70-85) and M8×35 (GB85-88).
b) Parallelism adjustment
Loosen the lock nut, turn the adjusting screw, measure the distance from both ends of the rear stop locating surface to the bottom edge of the knife with a depth ruler, and then tighten the lock nut after the error does not exceed 0, 05 mm.
Try cutting the board and check the parallelism. If there is any deviation, continue adjusting.
The distance from the middle of the rear stop locating surface to the bottom edge of the knife should be slightly greater than that at both ends.
If the deviation of the distance from both ends of the back stop locating surface to the lower knife edge is too large, loosen the screws supporting the transition plate connecting the servo motor. Then loosen the link bolts between the bracket and the transition plate so that the synchronous timing belt can be loosened.
Then turn the ball screw on one side to make the distance from both ends of the backstop locating surface to the bottom knife edge almost the same.
Then install the synchronous timing belt, tighten the connecting bolts and tighten the synchronous timing belt.
Then adjust the parallelism, and the adjustment method is the same as above.
( 7) Hydraulic system pressure adjustment:
The machine tool pressure values were adjusted according to the working specifications before leaving the factory.
The user does not need to adjust it himself, but after overhauling the machine or replacing hydraulic components, adjustment may be necessary.
If the user needs to adjust the system pressure, valve 30 must be adjusted according to the maximum working pressure (25MPa) of the hydraulic system.
