Will rust or deformation of the wiper arm affect windshield wiper performance?

1. Surface corrosion weakens contact smoothness

When the metal surface of the wiper arm rusts, the originally smooth contact surface becomes rough and uneven. The rough arm creates tiny gaps when driving the wiper blade, causing the wiper blade to not adhere tightly to the windshield, resulting in more rainwater residue.

Rust can also cause adhesion between the arm and the connecting parts, increasing frictional resistance, raising the motor load, and thus affecting the smoothness of the oscillation.

2. Structural deformation leads to deviation in movement trajectory

After external impact or prolonged use, the wiper arm may be slightly bent or twisted. Deformation will cause the arm's swing center to deviate from the designed trajectory, resulting in an uneven path swept by the wiper blade on the glass surface, causing "jumping" or "missed wipes."

Deformation also causes the installation angle between the wiper arm and the wiper blade to no longer be optimal, weakening the pressure force during wiping and affecting cleaning efficiency.

3. Reduced Strength Affects Oscillation Stability

Rust and deformation weaken the overall strength of the metal, causing slight elastic deformation of the wiper arm during high-speed oscillation. This elastic deformation leads to unstable oscillation frequency, resulting in vibration or noise, further reducing the reliability of the wiper.

For heavy-duty trucks or large vehicles, insufficient strength may even cause the arm to break, creating a safety hazard.

4. Importance of Rust Prevention and Maintenance Measures

Wipe arms made with rust-resistant coatings, galvanized steel, or stainless steel can significantly delay corrosion. Ningbo Nanxing Auto Parts Co., Ltd. strictly implements surface anti-corrosion processes during the production of its wiper arms, ensuring that the product maintains good performance in humid environments for a long time.

Regularly inspecting the wiper arm's appearance, promptly removing dirt, and performing rust prevention treatment can effectively prevent the spread of rust and structural deformation, maintaining the wiper system in optimal working condition.

Does the Wiper Arm Installation Angle Affect Wiping Performance?

1. Angle Determines Wiper Blade Pressing Force

The correct installation angle allows the wiper blade to maintain a uniform pressing force throughout its stroke, ensuring an intact contact surface between the wiper blade and the windshield. 1. Angle deviation can lead to insufficient adhesion in some areas, leaving water residue and even scratches.

Excessively large or small tilt angles can cause over-adhesion of the wiper blade in certain areas, increasing wear and shortening its lifespan.

2. Improper angles cause bounce and noise.

When the wiper arm's installation angle does not match the design angle, the wiper blade is prone to "bouncing" during rotation, meaning intermittent loss of contact with the glass surface. This bouncing is accompanied by noticeable noise, affecting driving comfort.

Bouncing also causes the wiper blade to impact at high speeds, further accelerating wear on the arm and wiper blade.

3. Angle affects coverage and cleaning uniformity.

A proper installation angle allows the wiper arm to cover the maximum effective area of ​​the windshield during swing, ensuring that rainwater is thoroughly cleared across the entire field of vision. Angle deviations can lead to blind spots or repeated wiping areas, reducing wiping efficiency.

For curved glass on different vehicle models, fine-tuning the angle is particularly crucial. Ningbo Nanxing Auto Parts Co., Ltd., in developing its wiper arms, provides adjustable mounting holes or locating pins for different vehicle models to achieve optimal angle matching.

4. The Necessity of Precise Installation and Quality Control

During the production process, rigorous dimensional inspection and angle calibration are essential to ensure that the installation angle of each wiper arm conforms to design specifications.

On the assembly line, technicians should use specialized tools or measuring instruments to verify the angle of the arm body, making fine adjustments as necessary, to ensure that the finished product achieves optimal wiping performance in actual use.