Common faults and daily maintenance of sander

Woodworking sander for automatic feeding system, referred to as sander or wide belt sander in woodworking machinery industry, is a woodworking machinery manufacturer, mainly for woodworking sheet processing industry, floor wall panel processing industry, bamboo and wood crafts processing industry, bamboo. The wooden toy processing enterprise, specially developed sanding equipment, has the characteristics of simple operation, high degree of automation, high production efficiency, mature and stable technology, perfect supporting, etc. It can be perfectly connected with the automatic production line to form various automatic production lines.

How many common type of sanders?

1.Light-duty sander.Light-duty sander has small power, small frame, small size and light weight, small sanding force of sand roller, and easy damage caused by overload operation, but the price is relatively low, suitable for small-scale production.

2.Heavy-duty sander.Heavy-duty sander is equipped with large power, thick frame, large and heavy machine, large sanding force of sanding roller, strong and durable, but the price is about 30% higher than the ordinary type, suitable for scale production.

3.Double-sided sander.One-time sanding machine with positive and negative at the same time, the structure is more complicated, the adjustment is inconvenient, and the cost is relatively high. Only large-scale sheet metal processing enterprises can use it.

4.Lacquer sander.Applicable foe lacquer painting sanding work.

5.Edge sander.The machine is suitable for sanding of planar and linear special-shaped edge milling; Various milling heads and sand heads can be arranged according to the requirements of different processing technologies.

what are the common faults?

During the operation of the machine, there are something go wrong, but these should be eliminated in time, but if not handled properly, it may affect production and increase costs. This requires the operator to be familiar with the operating regulations, skilled operation, and timely elimination. Some faults are not serious when they are discovered, but if they are not properly handled, they will cause big faults and seriously affect production. The following is an analysis of common faults in sanders.

service tool

1.The deviation of the belt is generally caused by improper adjustment. The normal belt swing should be 15-20 mm, the swing frequency is 15-20 times/min, the swing speed is moderate and the swinging speed is the same. If it is in an abnormal state, the time may be long, and the deviation may occur. Especially, the pendulum swing speed is inconsistent, and it is more likely to cause abnormal shutdown; the photoelectric switch is damaged, the solenoid valve is damaged, and the swing cylinder is damaged. Poor vacuuming, high dust concentration will affect the normal operation of the photocell, and also cause the belt to run off; the damaged parts should be replaced in time to improve the dust removal effect.

2.Limit position failure,both sides of the belt have its limit switch. When the belt swings out, when the belt is turned to one side, the limit switch is touched, the belt is loosened, and the main motor is automatically stopped, which can effectively protect the belt. Once the limit is broken, the belt can be damaged, the friction frame will produce spark, and even cause a fire.

3.When the belt is wrinkled, the belt can no longer be used once it is wrinkled. Generally, there are three possibilities for the belt to wrinkle: the abrasion of the sanding roller and the tension roller, the grinding and repairing of the roller; the abrasive belt is damp and soft, causing wrinkling. It is treated by drying and dry in the sun; the sanding machine does not use the surface of the sanding roller for a long time, and the surface of the sanding roller is rusted and rough, and the sanding belt is difficult to swing. At this time, the roller should be rusted or polished with fine sandpaper.

4.The belt breakage are mainly caused by the deviation of the belt, or the blunt belt is not replaced in time, or the sanding load is too large, or the hard object in the sanding process, or the quality problem of the belt itself. The belt should be broken as much as possible, otherwise it may cause a fire. When the current is abnormal, it should be observed whether the belt has been blunt, and if it is, it should be replaced in time.

5.When feeding the panel appeared that deviation, slip, rebound.In the adjustment of the sander, the upper conveyor roller back pressure spring is required to adjust to two-thirds (one-third of the remaining), the upper conveyor roller and the lower conveyor roller should be separated by the thickness of the slab is less than 1.5 mm or 1 mm, otherwise it will cause the panel to run off or slip. In severe cases, it causes a rebound, which may hurt personal safety.

6.After the belt is replaced, the size of the sanding panel changes, and when the cantilever of the sanding machine is loosened or locked, the position fluctuates greatly, and the normal position should be within 0.5mm. If it is too large, when the locking block locks the cantilever, causing the size of the sanding plate to fluctuate, which directly affects the sanding precision of the sander. When the cantilever faults is too large (more than 0.5mm), the locking block fixing bolts should be unscrewed and properly adjusted. At the same time, when the belt is replaced, the locking block should be locked in the same strength.

7.When the conveyor roller rotates intermittently or does not rotate during operation, it is generally impossible to observe the above situation. It can only be found when the vehicle is empty. The reason is that the worm wheel is partially worn or completely worn during the worm gear transmission. Although it will not affect the work, other worm gears will shorten the life and cause more losses due to the increased workload. Therefore, once this is discovered, it should be replaced immediately.

8.The main bearing seats is abnormally vibrating: Under normal condition, the main bearing seats has little vibration. It can be judged by comparison with other bearing seats, or it can be used from the surface of the sanding panel. Good or bad to judge. When the vibration of the bearing seat is abnormal, it can be considered that there are two reasons. First, the bearing is damaged, as long as the bearing is replaced. Second, the contact roller wears out, transformation, the original dynamic balance is destroyed, and the vibration is abnormal. This situation must be Remove the sand roller for maintenance.

9.The main drive belt is slippery. In the Q-type and M-type sanders, high-speed flat belts are used. This type of transmission is theoretically more efficient than a V-belt transmission. However, in actual use, belt deviation or slippage may occur, which is mainly caused by improper adjustment. It should be adjusted strictly according to the requirements of belt elongation of 1.5-2%, and the belts should be elastic on both sides. When the adjustment is completed as required, the test operation should be carried out. In particular, when the main motor current suddenly rises, observe whether the belt is off-tracked. If the deviation is reversed, a second adjustment should be made.

How do we maintain the machine?

First inspection: 4 hours after the new machine starts to use or replace the new product
·Second inspection: 1 day after the previous inspection
·Third inspection: 3 days after the previous inspection
·Fourth inspection: 5 days after the previous inspection
·Fifth inspection: 7 days after the previous inspection
·After the inspection: every other week

If one of the same pulleys needs to be replaced, be sure to replace the other belts that are attached to the same pulley. Even the second-hand sander is a very expensive thing. It is not a small item for individuals or companies. Therefore, the maintenance and maintenance of the company must be kept up.

By |2019-09-23T17:23:44+08:00September 23rd, 2019|Woodworking Industry News|