How to Choose a 35KHz Ultrasonic Welding Machine for Precision Spot Welding

Introduction

35 kHz ultrasonic welding machines are primarily used for precision spot welding of

 small plastic components, where controlled amplitude and minimal vibration are critical. 

While they can be integrated into automation, the selection principles start from understanding

 the core machine characteristics

35 kHz ultrasonic spot welding system for high-precision, multi-station plastic welding applications.

This article explains how to choose the right 35KHz ultrasonic welding machine and

what factors matter most when selecting equipment for precision manufacturing.

1. Why Choose a 35KHz Ultrasonic Welding Machine?

Compared with lower-frequency machines, a 35KHz ultrasonic welder offers:

• Higher welding precision

• Lower vibration impact on small parts

• Better control for thin or delicate components

These advantages make 35KHz ultrasonic welding machines ideal for electronics and

micro-welding applications.

2. Power Selection: Is 800W Enough?

For most precision spot welding tasks, 800W power output provides an excellent balance 

between welding strength and control.

• An 800W ultrasonic welding machine is suitable for:

• Spot welding of small plastic parts

• Riveting and positioning

• Electronic terminals and connectors

Choosing excessive power may cause unnecessary deformation, while insufficient power 

can result in weak welds.

3. Key Features to Look For

When selecting a precision ultrasonic welding machine, pay attention to:

● Automatic Frequency Tracking

Ensures stable ultrasonic output and consistent welding quality.

● High-Quality Pneumatic Components

Reliable pneumatic systems improve repeatability and machine lifespan.

● Adjustable Welding Time

Short and precise welding cycles are essential for mass production.

4. Typical Applications of 35KHz Ultrasonic Welding

35KHz ultrasonic welding machines are widely used in:

• Mobile phone antennas and components

• USB connectors and SD card terminals

• Small electronic housings

• Precision plastic assemblies

Conclusion

Choosing the right 35KHz ultrasonic welding machine is essential for achieving stable, 

high-quality spot welding results.

By focusing on frequency, power, and system stability,manufacturers can significantly

improve production efficiency and product quality.

Explore our spot welding solutions for small plastic and electronic components.