2. A silicon steel sheet should be inserted between the upper and lower dies before closing to prevent the knife edge from being hurt during handling. 3, before the mold is installed on the punch, it is necessary to use the oil stone to grind off the bottom surface and the burrs above, and clean up the garbage with cloth strips. If there are burrs or garbage on the upper and lower planes of the mold, it will cause the burr to be out of balance. 4. Adjust the stroke of the slider to the appropriate position to press the upper die, and ensure that the die handle or the die frame plane is closely fitted to the bottom surface of the slider, and the screw of the lower die pressing plate is gently pressed. Then, adjust the slider upward and remove the silicon steel sheet in the middle. Loosen the lower die screw, adjust the slider downward until the punch enters the die 3~4mm, press the lower die screw. When punching the new die, the punch must enter the die 3~4mm, otherwise, the punch crack or the die crack will appear. 5, lift the slider to the top dead point position, adjust the punch rod stop screw, and then idling several times, observe whether the mold and punch institutions work normally. If there are no anomalies, we can start production. Punching die structure description: Punching die is the upper half of the whole pair of punching die, that is, the punching die part installed on the press slide. The upper die seat is the top plate-like part of the upper die, and the workpiece is attached to the press slider and fixed by the die handle or directly with the press slider. The lower die is the lower half of the whole pair of dies, that is, the die part installed on the press table surface. The lower die seat is a plate-like part on the bottom surface of the lower die, which is directly fixed on the working table or the backing plate of the press when working. The edge wall is the side wall of the cutting edge of the punching die hole. The edge slope is the slope of each side of the edge wall of the punching die. Air cushion is an ejector powered by compressed air. See \"Ejector\". The anti-side press block is a part that supports a unidirectional force punch on the other side of the working face. The guide sleeve of the punching machine is a tubular part that provides precision guidance for the relative movement of the upper and lower die seats, most of which are fixed in the upper die seat and are used in combination with the guide post fixed in the lower die seat. The guide plate is a plate-like part with a precise sliding hole with the punch, which is used to ensure the mutual alignment of the punch and the die, and to discharge the material (part). The guide column is a cylindrical part that provides precise guidance for the relative movement of the upper and lower die seats. Most of them are fixed in the lower die seats and are used in combination with the guide sleeve fixed in the upper die seats. The guide pin is a pin shaped part that is inserted into the hole of the material to guide its position in the die. The guide die is a die guided by the guide plate, and the punch does not separate from the guide plate when the die is used. The guide plate is a plate-like guide part that guides the strip (belt, roll) material into the die. The guide post mold frame is a mold frame in which the guide post and guide sleeve slide each other. (See \"Mold Frame\"). Maintenance:
1, ensure the best mold gap, mold gap refers to the punch into the lower die, the sum of the gap on both sides. Different plate thickness, different materials should choose different gap of the mold. The selection of appropriate mold clearance can ensure good punching quality, reduce burr and collapse, keep the sheet flat, effectively prevent the material, and extend the life of the mold.
2, timely grinding can effectively extend the service life of the mold. When the die edge wear produces an arc with a radius of about 0.10mm, sharpening is required. When grinding, each grinding amount is 0.03~0.05mm, repeat grinding until the punch is sharp. After sharpening, use a stone to polish the cutting edge, remove burrs, and apply lubricating oil after demagnetization.
3, to regularly check the neutrality of the upper and lower die seat of the turntable. If the neutral position of the punching die is not good, resulting in rapid passivation of the die and poor machining quality of the workpiece. Check and lubricate the die holes and guide keys on the turntable, and repair them in time if there is damage; Clean the lower die seat of the turntable for accurate installation of the lower die, and check the wear of its keys or keyways, and replace if necessary; Use a special mandrel to calibrate the mold station, and adjust the deviation in time.
4, when soft or sticky materials (such as aluminum); Thin abrasive materials (such as glass epoxy sheets); Thin hard materials (such as stainless steel); Frequent punching, surface hardening (using titanium plating, nitriding, etc., the surface hardening layer for the thickness of 12~60μm molecular structure) punch.
5, the molding mold should gradually fine-tune the hitting head from the lowest position to the appropriate position, otherwise it is easy to break the mold.
6, due to the pressure and heat during stamping, the fine particles of the sheet metal will be bonded to the surface of the punch, resulting in poor punching quality. The removal of sticky material can be polished with a fine stone, and the direction of grinding should be the same as the direction of movement of the punch.
7, if you punch a lot of holes on a plate, you should first punch every other hole, and then return to punch the remaining holes, which effectively alleviates the stress accumulation in the same direction of sequential stamping, and also makes the stress of the two groups of holes offset each other, thereby reducing the deformation of the plate.
8, try to avoid cutting too narrow strip material. When the die is used to punch the sheet material whose width is less than the thickness of the sheet, the punch will be bent and deformed due to lateral force, so that the gap on one side is too small or the wear is aggravated, and the lower die will be scratched seriously, causing the upper and lower die to be damaged at the same time.
1, before installation, we should first confirm that the cutting edge of the mold is sharp, the cutting edge of the concave die is not broken, and the punch is not missing. If there are cracks or missing corners, please sharpen the edge first.
2. A silicon steel sheet should be inserted between the upper and lower dies before closing to prevent the knife edge from being hurt during handling.
3, before the mold is installed on the punch, it is necessary to use the oil stone to grind off the bottom surface and the burrs above, and clean up the garbage with cloth strips. If there are burrs or garbage on the upper and lower planes of the mold, it will cause the burr to be out of balance.
4. Adjust the stroke of the slider to the appropriate position to press the upper die, and ensure that the die handle or the die frame plane is closely fitted to the bottom surface of the slider, and the screw of the lower die pressing plate is gently pressed. Then, adjust the slider upward and remove the silicon steel sheet in the middle. Loosen the lower die screw, adjust the slider downward until the punch enters the die 3~4mm, press the lower die screw. When punching the new die, the punch must enter the die 3~4mm, otherwise, the punch crack or the die crack will appear.
5, lift the slider to the top dead point position, adjust the punch rod stop screw, and then idling several times, observe whether the mold and punch institutions work normally. If there are no anomalies, we can start production.