Abstract

The rutine check up and maintenance of the robotic arm will keep it in good condition and working safely. Here in this chapter you'll have a principal guideline of the maintenance of the robotic arm for injection molding automation.

14.1 Contenets of maintenance work

According to the nature of maintenace operations, it can be divided into: cleaning, inspection, tightening, adjustment, inspection and replenishment operations. The inspection operation is performed by the client equipment maintenance personnel, or by the technical personnel of our company.

1. Cleaning, inspection and replenishment operations are generally performed by equipment operators.
2. Tightening, adjustment and lubrication are generally performed by mechanics.
3. Electrical work should be performed by professionals.

Routing maintenance of equipment is the basis of maintenance at all levels, which is directly related to operation safety, energy consumption, and service life of parts. Routine maintenance operations are carried out by equipment operators. The contents of the operation center are mainly cleaning, replenishment, safety and inspection, and the three-inspection system system before starting, during operation, and after closing is adhered to. Check the reliability of the operating mechanism, running parts and safety protection devices, maintain the cleanliness of the whole machine and each assembly part, lubricating point must be lubricated in place, and tighten loose parts. In order to use the robot normally for a long time and prevent the occurrence of mechanical failure, it's necessary to carry out regular inspection of the manipulator. The maintenance and inspection items and cycles are as follows. Please implement it carefully.

Note: A well conducted routine maintenance is more important than the repair of the robot after the parts broken. Keep the robots clean and well lubricated will help to prolong the life of the robotic arm and have it working safely.

14.1.1 Fixture Function Confirmation

1. Whether the suction cup is damaged or dirty.
2. Whether the trachea is damaged, loose or leaking.
3. Whether the holder iis off-position and loose. Whether the holding piece is deformed or damaged.

14.1.2 Check for loose parts

1. Is the chamfer loose?
2. Is the fixing screw loose?
3. Whether the fixture is deformed

14.1.3 Maintenance of cylinder guide rod and bearing lubrication

1. Clean the guide rod, remove dust and rust spots
2. Use a brush to apply the lubricating oil evenly on the guide rod, so that the lubricating oil is not easy to accumulate.

14.1.4 Lubrication and maintenance of slide rails and sliders

1. Clean the slide rail to remove the dust and rust spots
2. Use a grease gun to inject grease into the slider from the slider nozzler. (Important parts)
3. It is recommended to use grease type: THK AFB-LF Grease.
4. Relubicate the bearing block at operating temperature, manually move it a distance of at least 4 times the length of the bearing block, the relubrication must be done during the movement to apply the grease to the entire rolling element.
5. Repeat this operation several times until a small amount of grease will appear at the end of the bearing during the manual forward and backward movement. At this time, the relubrication operation is completed.
6. Scrape off excess grease from the end of the guide rail and bearing block.
7. Then move the bearing block back and forth several times at very low speed in automatic mode to ensure complete and even relubrication.
8. Scrape off the exccess grease at the end of the guide rail and bearing block again.
9. Let the manipulator work at 70% cycle performance for about half an hour. Then switch to 100%.

14.1.5 Clean and tidy appearance

1. Dust the surface of the machine and wipe off the oil stains.
2. Tracheal line arrangement and binding.
3. Whether the towline is disconnected, damaged or cannot be connected.

14.1.6 Hydraulic shock absorber function check

1. Check whether the machine speed is too fast
2. Whether the oil pressure buffer leaks oil
3. Whether the buffer cannot be ejected

14.1.7 Two-point combined maintenance

1. Check whether there is water or oil in the water cup and discharge it in time
2. Check whether the pressure indication of the dual electric combination is normal
3. Air compressor drains regularly

14.1.8 Check the fixture and the fixing screws of the fuselage

1. Check whether the fixing screws of the fixture connection block and the body screws are loose.
2. Check whether the fixing screw of the fixture cylinder is loose.
3. Check whether the fixing screws between the fixture and the fuselage are loose.

14.1.9 Gear

Check whether the gear clearance is normal. (if the tightening screw is loose, you need to replace the screw immediately andd make the following adjustments)

1. Loosen the fastening screws first
2. Tighten the adjusting screw moderately so that the gear is firmly against the rack. At this time, the gear backlash J is zero.
3. Tighten the fastening screws appropriately (the motor can also move slightly)
4. Adjust the scale to zero, and record the minimum value J1 and maximum value J2 of the scale in the whole stroke, check whether the difference between J2 and J1 is within 0.3-0.4mm, and readjust if not.
5. After the adjustment is completed, first completely tighten the fastening screws, and then properly tighten the adjustment screws.

14.1.10 Timing belt

Checking whether the timing belt is good is usually judged by testing the tightness of the belt.
The specific method is as follows:

1. Check whether the surface of the timing belt is good.
2. Use the frequency detector to detect as shown in the figure, the detection point is Generally located at the center of the idler pulley and the fixed end of the belt.
   1. Place the frequency detector probe a few millimeters above the belt.
   2. Gently tremble the belt with your fingers.
   3. Record data
3. If the data is abnormal, you need to unscrew the belt again, adjust and re-test until the data is normal.

Because the fixture is used with a manipulator, it's basically in use and needs to be stopped for inspection every day. Please consult the technical service department of our company regarding the inspection method, content, handling and other related content.

Daily Point Inspection form of Robot