English 
Views: 0 Author: Site Editor Publish Time: 2022-02-01 Origin: Site
The importance of sewing machine knife in the field of mass production of clothing is self-evident. Only when we use sewing machine knife correctly, can we maximize its effect.
Why do people choose sewing machine knife?
How to align the sewing machine knife on the sewing machine up and down?
How to install sewing machine knife?
When the angle between the cutting edge and the workpiece is determined, sewing machine knife is often designed to maximize its strength and robustness. If the blade is too far above the centerline, the blade clearance angle will decrease. As a result, the upper part of the sewing machine knife rubs against the workpiece, so a lot of heat will be generated in the cutting area. In turn, this will cause premature wear of the blade and cold work hardening of the workpiece. The most common sign of this situation is excessive flank wear of the insert after a short period of cutting. Blades below the centerline will cause more problems. When the blade is lower than the centerline, the clearance angle will increase. This makes the very small part of the tool tip to withstand the full cutting force, thereby shortening the tool life and increasing the possibility of sudden failure of the sewing machine knife. Another problem with blades below the centerline is the irregular deviation of the blades. With most of the cutting force acting on the tool tip, the sewing machine knife tends to vibrate and rebound. This irregular movement will affect the life of the sewing machine knife, usually in the form of chip breaking at the front of the cutting edge. It will produce vibration marks and poor surface roughness on the bottom and sides of the part groove.
It is recommended to install the sewing machine knife below first. When installing the sewing machine knife above, lower its lever until it reaches the sewing machine knife below, and then install the sewing machine knife above, because it should be flat against the two blades. , When tightening the fixing screws at the end of the next step, push the sewing machine knife down to one side of the direction again. This is how I installed and aligned sewing machine knife.
Loosen the spring screw of the sewing machine knife below, and move the lower knife seat to the left. Loosen the upper knife screw and replace it. Turn the handwheel, when the needle is at the bottom, the upper sewing machine knife cut surface is level with the lower sewing machine knife cut surface. Tighten the loosening screw of the lower knife seat to tighten the position of the upper and lower knife.
That is the information about the sewing machine knife. If you want to get more information about the sewing machine knife, please connect MACHINERY TECHNOLOGY CO.,LTD. They will be very pleased to help you.
