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Noise Removal Treatment Of Sewing Machine
- Oct 29, 2018 -

When working at high speeds, the sewing machine emits abnormal friction, impact and loose sound, all of which are in the category of “noise”.

When an abnormal noise failure occurs in the sewing machine, we can identify where the machine has failed and then perform targeted processing on the different parts of the machine where the noise occurs.

Case 1. The tooth surface of the bevel gear meshes at different heights, causing noise when the gear is running at high speed.

We loosen the fastening screws of the bevel gears that match the different sizes of the bevel gears. First, loosen the bushing fastening screws that are in contact with the bevel gear shafts. Knock the bar with the high and low positions of the meshing of the flank surfaces, and then tighten the bevel gears respectively. And fastening screws for the bushing.

Case 2, the sound is caused by the axial looseness of the upper, vertical and lower shafts.

We can loosen the two fastening screws of the gear, then adjust the vertical axis again according to the standard, and adjust the axial clearance of the upper and lower shafts until they are suitable.

Case 3: The meshing clearance of the bevel gear tooth surface is too large or too small, causing an audible fault.

We correct the meshing clearance of the bevel gear tooth surface by tapping the sleeve. Generally, the meshing clearance of a pair of gears is between 0.20mm and 0.40mm.

Case 4, the gear quality is not good.

Add a small amount of abrasive paste on the two pairs of meshing teeth. We rotate the upper wheel by hand and put it for about 10 minutes to 15 minutes. Then, we use kerosene to clean the dirt, add a little oil, and then adjust the gap as required.

Case 5, the gap between the hook and the positioning hook is too large.

We can adjust the gap between the hook and the positioning hook in the range of 0.45mm~0.65mm.

Case 6, lack of oil in the moving parts due to the failure of the oil circuit system.

We can check or adjust the oil supply to the oil system.

Case 7, the rack or the head is not installed smoothly.

In this case, we need to re-adjust the rack or the head to make it smooth.

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