Industry News

Failure and modification plan of cutting machine

2020-06-24
1. The friction wheel and transmission gear in the sharpening mechanism are the most vulnerable parts.
Knife sharpener lifting mechanism: control the micro motor through electronic circuit commands, and the motor drives the screw to run up and down. Simple structure, convenient operation, low noise and long service life.

Second, the blade edge of the abrasive belt is observed by a microscope and is in a tooth shape. After cutting the fabric, the micro blade's blade teeth quickly fall off, and the blade edge is dulled to passivate the blade, so a few pieces are cut. The cloth has to be ground once.
Knife sharpening device: Two high-weight grinding wheels are pressed against the two sides of the blade edge. With the reciprocating power of the blade, the grinding wheel is driven to rotate at a high speed to achieve the purpose of sharpening the blade. The sharpness of the grinding edge of the grinding wheel is naturally better than the abrasive belt. The breakdown of the sharpening mechanism is almost zero, which reduces the manufacturing cost and use cost.

3. The position of the abrasive belt of the sharpener often shifts. After the shift, the first is that the abrasive belt cannot be worn to the edge of the bottom edge. The second is that the cutter head cuts the abrasive belt from time to time.
To shorten the reciprocating stroke of the blade, cancel the cutting edge cloth. The pole at which the bottom end of the blade is raised is controlled within the upper plane of the chassis, and all the laminated fabrics are cut by the straight edge of the blade. The blade is not easy to passivate and durable. It can completely prevent the yarn from blocking the sipe of the chassis.

4. Friction is formed between the plane of the blade and the plane of the magazine, the back of the blade and the back of the magazine, and the coefficient of friction is greater when the blade is slightly bent. After friction, the blade generates high temperature and sinters the cloth when cutting chemical fiber cloth. Cut denim fabric, rub the temperature and put the blade from red to black.
In order to overcome the high temperature generated by the blade: solution one: In the tool magazine on the back of the blade, ceramic balls or cylinders are arranged at intervals. The rolling friction of the back of the knife is used to replace the sliding friction of the prior art, which can reduce the friction force by more than 80%. Fundamentally reduce the reaction force and friction force. Solution two: Design the tool magazine into a grid shape and replace the existing surface friction with line friction. Can reduce the friction surface by more than 70%. Overcoming the continuous high temperature of the blade.

5. Due to the excessive friction coefficient, increasing the power of the motor to solve the cutting, increasing the power of the motor increases the weight, resulting in overload of the cutter bar and chassis, and the phenomenon that the cutter bar shakes and the chassis sinks.
By reducing the friction coefficient, the motor power can be reduced while reducing the weight of the motor.