Ultrasonic cutting equipment is a device that uses high-frequency ultrasonic vibration (usually 20-40kHz) to generate small vibrations in the cutting blade, and achieves cutting by "separating the binding force between material molecules through vibration energy". It has the advantages of smooth cutting, no burrs, and low thermal damage, and is widely used in fields such as plastics, rubber, composite materials, food, textiles, etc. The operation method should follow the process of "equipment preparation - parameter setting - trial cutting and debugging - formal cutting - final maintenance". The specific steps and key precautions are as follows:
1、 Preparation before operation: Ensure that the equipment and materials are compatible and the environment is safe
1. Equipment and accessory inspection
Core component inspection: Confirm that the ultrasonic generator (power host), transducer (converts electrical energy into mechanical energy), and cutting blade (vibration executing component) are firmly connected - the connecting bolts between the transducer and cutting blade need to be tightened (to avoid loosening and energy loss), the power and signal lines of the generator are not damaged, and the grounding protection is normal (to prevent leakage).
Selection of cutting knife: select the suitable cutting knife according to the material type and thickness (for example, sharp edge knife is used for thin plastic, and blunt edge knife is used for soft materials such as foam), so as to ensure that the cutting head is free of wear and deformation (wear will reduce the cutting efficiency and cause rough cuts).
Preparation of auxiliary accessories: If cutting thick or easily displaced materials, it is necessary to install "fixtures" (such as pneumatic fixtures, manual positioning fixtures) to fix the workpiece; When cutting adhesive materials (such as rubber), prepare a "release agent" (apply a small amount to the blade to prevent material adhesion).
2. Material pretreatment and positioning
Material sorting: Remove impurities (such as dust and oil stains) from the surface of the material to avoid wear on the cutting edge or affecting the accuracy of the incision; For easily deformable materials such as films and soft fabrics, cut them in advance to a size suitable for the equipment workbench (usually not exceeding 80% of the workbench area).
Workbench positioning: Place the material steadily on the equipment workbench and determine the cutting position using a "positioning ruler" or "positioning block" (such as marking the distance between the cutting line and the edge of the workbench) to ensure that the cutting path is consistent with expectations; If the equipment is equipped with a CNC system (such as an automatic feeding platform), the material size and cutting coordinates (such as X/Y axis cutting path) need to be entered into the system.
3. Environmental and safety preparation
Environmental requirements: The equipment should be placed on a flat and dry ground (to avoid tilting and causing workpiece displacement), with no strong electromagnetic interference around (such as staying away from large motors and welding machines to prevent generator failure), and good ventilation (to avoid the accumulation of dust and odors generated by cutting).
Safety protection: Operators wear "protective gloves" (to prevent accidental injury from cutting knives or material burrs and scratches) and "goggles" (to prevent debris splashing when cutting brittle materials such as fiberglass); Long hair should be tied up and cuffs tightened (to avoid getting caught up in moving parts).
2、 Trial cutting and debugging: Verify the rationality of parameters and optimize the quality of incisions
Trial cutting is a key step in ensuring cutting effectiveness, and it needs to be optimized through a cycle of "small-scale trial cutting - observing the incision - adjusting parameters":
Small scale trial cutting: Select the "corner area" (non critical part) of the material for trial cutting, control the cutting length within 5-10cm, and observe the cutting status——
If the incision is rough and uncut: increase the ultrasonic power or reduce the cutting speed. If it still does not improve, check whether the cutting blade is worn (replace the blade head);
If the material is deformed or melted due to overheating (such as blackening of plastic cuts): it is necessary to reduce the power or increase the cutting speed, and at the same time check whether the cutting head has been in contact with the material for too long (adjust the depth of the cutting head to avoid excessive pressing);
If the incision is offset or uneven, it is necessary to reposition the material (reinforce the fixture) or adjust the "tool head perpendicularity" of the equipment (some equipment comes with a leveling knob to ensure that the tool head is perpendicular to the workbench).
Parameter fine-tuning: Adjust one parameter at a time (such as increasing power by 100W and speed by 5mm/s each time) to avoid the problem of inability to locate the cause of multiple parameters being adjusted simultaneously; Try cutting 3-5 times until the incision is flat, without burrs or thermal damage, and record the parameters at this time (for subsequent batch cutting).
3、 Formal cutting: operate according to the process to ensure efficiency and safety
1. Batch cutting (manual/automatic operation)
Manual cutting (suitable for small batches and irregular workpieces):
The operator holds the material with both hands (or fixes it with a fixture), slowly pushes the material to move along the cutting line, and at the same time steps on the foot switch to start ultrasonic vibration (the cutting head descends to contact the material), maintaining a uniform movement speed (avoiding abrupt changes that may cause the incision to deviate); When cutting to the end point, first release the foot switch (stop vibration), then lift the blade head to avoid lifting the material.
Automatic cutting (suitable for large quantities and regular workpieces):
Start the "automatic cutting program" in the CNC system, and the equipment will automatically feed and cut according to the preset path (such as straight lines, arcs, complex shapes); During the process, it is necessary to observe the operation status of the equipment in real time - if there is any "abnormal noise" (such as high-frequency noise from the transducer) or "material jamming", immediately press the "emergency stop button" to check whether it is material displacement or tool blockage.
2. Process monitoring and precautions
Avoid tool head vibration: When not in contact with materials, it is forbidden to start ultrasonic vibration for a long time (air vibration can cause overheating and damage to the tool head, shorten the life of the transducer);
Timely cleaning of blade head: When cutting viscous materials (such as rubber and resin), wipe the blade head with an alcohol swab every 10-20 pieces (to remove adhesive material residue) to prevent residue from affecting vibration transmission;
Control the duration of a single cutting: It is recommended that the continuous cutting time should not exceed 30 minutes (some high-power equipment can be extended to 1 hour), and the machine should be stopped for 5-10 minutes to allow the transducer and generator to dissipate heat (overheating can cause equipment performance degradation).