Hydraulic Sheet Metal Decoiler Problems and Their Causes

Hydraulic sheet metal decoilers are essential in the metalworking industry, but like any other piece of equipment, they can encounter issues from time to time. One such problem occurred when a client experienced an unexpected malfunction after adding new hydraulic oil to their previously functioning decoiler. This article will explore the root cause of this issue and provide an effective solution to get your hydraulic sheet metal decoiler back up and running.

Main Issue: Air Ingestion in the Hydraulic Cylinder

When the expansion and contraction of the drum in a hydraulic sheet metal decoiler stops midway during the loading process, the primary cause is often air ingestion in the hydraulic cylinder. As air enters the piston-type hydraulic cylinder, it travels along the inner wall of the cylinder, bypassing the oil seal and reaching the opposite end. This creates an empty space inside the cylinder, preventing hydraulic oil from entering and making the cylinder inoperative.

Contributing Factors: Why Does Air Enter the Hydraulic Cylinder?

Several factors can contribute to the ingress of air in the hydraulic cylinder, including:

  1. Insufficient oil replenishment: Inadequate oil levels in the hydraulic sheet metal decoiler can cause the oil pump to intake air, resulting in air ingestion.
  2. Numerous oil line connections: Multiple connections in the oil line system can create opportunities for air to enter the hydraulic cylinder.
  3. Other possible entry points: Air may also find its way into the hydraulic cylinder through other, less obvious means.

Effective Solution: Expelling Air from the Hydraulic Cylinder

Thankfully, resolving this issue is relatively straightforward. Follow these steps to expel the trapped air and restore the function of your hydraulic sheet metal decoiler:

  1. Loosen the screw: Locate the screw at the top of the hydraulic cylinder and loosen it.
  2. Open the oil pump: Engage the oil pump by opening it.
  3. Press the expand and contract buttons: Use the handle on the sheet metal decoiler to press the expand and contract buttons, allowing the trapped air to escape from the cylinder.
  4. Tighten the screw: Once the air has been released, tighten the screw at the top of the hydraulic cylinder.

If your hydraulic cylinder doesn’t have a screw at the top, you can open one of the return oil lines instead. This will allow the oil pump to operate and expel the trapped air.

Preventing Future Issues with Your Hydraulic Sheet Metal Decoiler

By understanding the causes of air ingestion in the hydraulic cylinder and following the steps outlined above, you can quickly resolve any expansion and contraction issues with your hydraulic sheet metal decoiler. To prevent future problems, ensure that your equipment is adequately maintained, and address any potential air entry points in your system. With proper care and attention, your hydraulic sheet metal decoiler will continue to function efficiently and effectively for years to come.

sheet metal decoiler
sheet metal decoiler