Make daily inspection to ensure safe production of punch press
Safety production is most important. HARSLE has always put the safety of punch press equipment in the most important position. We are constantly improving the safety performance of our existing punches and developing new technologies for the safety performance of new punches. HARSLE implements the “safety” enterprise policy and adheres to the standardized production, installation and after-sales workflow of punch press to ensure that each installation and maintenance operation can bring great safety to the actual production operation of customers.
HARSLE guarantees the quality of every factory punch. We need to emphasize that a high-quality punch made in accordance with the design specification does not necessarily mean a long-term good operation. The normal operation of punch press cannot be separated from the regular maintenance of customers themselves. As a professional punch manufacturer, HARSLE explains in detail the daily test items that customers should pay attention to in the actual stamping production process.
- Punch operators check items and key points daily:
| The test items | Test points | |
| 1 | The working environment in which punch presses are used | Make sure that the surroundings of the press are clean and tidy |
| 2 | Check oil level meter at lubrication point of punch press | All lubrication points shall be within the upper and lower limits of the oil level gauge |
| 3 | Check the compressed air system | – Sound can be used to determine whether there is air leak in each joint or part – Check the distribution pipe, joint, clutch and balance cylinder for leakage |
| 4 | Whether the pressure gauge pointer is within the range | Adjust the pressure of the pressure gauge to keep the pointer away from the red area |
| 5 | The filter | Drain the filter memory before operation |
| 6 | Gas reservoir | Open the drain valve of the air storage cylinder and drain the internal water before operation |
| 7 | Check the brake clutch and solenoid valve of punch press | Inching operation and the exhaust condition of the solenoid valve are used to identify anomalies |
| 8 | Check the rotary condition of flywheel after starting of punch motor | Pay attention to the starting, acceleration, vibration and whether there is any abnormal sound, such as the belt vibration when the rotary resistance is large |
| 9 | Check full operation of punch press | Inching, safety, stroke, continuous foot, etc. |
2、Punch operators check items and key points weekly
| The test items | Test points | |
| 1 | Test the air filter of punch press | Disassemble the filter to clean the metal mesh, so as to avoid the blockage of the metal mesh causing the air pressure not to rise |
| 2 | Inspection of press electric parts | The contact condition of the terminals shall be checked if there is any loosening or adhesion of oil, dust, etc. |
| 3 | Check whether the electrical wiring of the punch is abnormal | Check whether the electrical wiring is damaged, broken or loose, etc. |
| 4 | Sweep all parts of the press | Clean up oil, dust, debris, etc., and inspect for damage |
3、Press operators monthly check items and key points:
| The test items | Test points | |
| 1 | Measurement of stroke of press clutch and brake | – Stroke of dry clutch and brake of punch press shall be within 1.5-2.0mm (mainly precision punch press) – The stroke of wet clutch and brake of punch press should be within 1.5-5.0mm |
| 2 | Connect the main motor and flywheel V belt for testing | The V-belt is checked for tension by hand pressure, ideally in a curve of about 1/2″ |
| 3 | Check the condition in the balancing cylinder | Disassemble the balance cylinder to check the lubricating oil condition |
| 4 | Check dead center stop position on punch press | Common causes of incorrect dead stop on punch presses: – The stop position is certain, but the CAM switch position should be adjusted when it does not reach the upper dead point – The stop position is not certain, but the error range is not long, please adjust the clutch, brake stroke – The stop position is not certain, and the error range is too large, please adjust the CAM |
| 5 | Lubrication of all parts of the press | Manual pump should be pulled and pressed several times at any time to avoid loss of oil resulting in copper and punch guide plate heating and burning. |
| 6 | Variation of air pressure in punch press | Always pay attention to the pressure gauge, to prevent pressure out of the specified range, resulting in damage to the plate |
| 7 | All parts of the cleaning, cleaning and press the overall inspection | Check the residual air in the air storage cylinder should be discharged, and remove the sundries in all parts of the punch |
4、Punch operators check items and key points annually:
| The test items | Test points | |
| 1 | Test the stamping precision of punch press | – Comply with relevant tolerances – Please refer to the precision table for tolerances |
| 2 | Inspection disassembly of press clutch and brake | – Check and measure the friction plate of the dry clutch, check whether the U-ring in the cylinder has air leakage due to friction damage, check the friction in the spring cylinder, repair or update if it is defective – Wet stroke should be replaced after 5mm to make the blade and friction board |
| 3 | Testing of press solenoid valve | Check if the actuating condition is good, if the coil is burnt, if the spring is abnormal, if not, repair or replace it |
| 4 | Check screw in all parts of press | Check whether the screws are locked in all parts of the press |
| 5 | Wiring inspection of electrical contacts of punch press | Check whether the contact of the press relay is worn out and whether the connection is loose |
Please click the link http://www.harsle.com to know more about punch press!
