A drop of water can reflect the brilliance of the sun.，Detail is often the key difference in quality.。Hummer's new fourth national model HD Series heavy duty high frequency double drum roller，Fully upgraded compared to older models（Click on the link to view past videos），Its performance design takes into account the new trends in future-oriented compaction needs.，It's not just operational intelligence，Optimized 60 Hz High frequency compaction system can realize high speed compaction，Meet the compaction needs of various materials。

And benefit from HAMMTRONIC Intelligent compaction control system，The improvement of compaction quality can be seen in its new intelligent walking function.，Click on the video to see the practical results of innovative technology。

Examples speak

Construction site：Construction site of Beijing-Qinhuangdao Expressway in Qian'an, Tangshan City, Hebei Province

Compacted material： Upper layer SMA Asphalt concrete material

Compacted thickness： 6 cm

Compaction process：60 Hz High frequency vibration mode

Compaction speed：5.9 km/h

Highlights：In order to ensure excellent anti-cracking performance and better anti-sliding performance of expressway,，Extend the life of roads，It is usually used for overlaying. SMA Modified asphalt materials such as asphalt mastic。Compare to conventional bituminous materials,，This material has high requirements for paving temperature.，The temperature requirements for initial pressing and re-pressing are also very strict.。

Especially in winter when the ambient temperature is low.，The window period of compaction is more urgent.，This will affect the compaction efficiency of the double-drum roller in the initial rolling and re-rolling processes.、Reliability and stability have put forward high requirements.。 

In this project，The operator is right HD 138i VV The high frequency heavy duty double drum is set at 60 Hz High frequency vibration，Equipment is not affected by engine load，Maintain a steady frequency throughout the compaction operation，5 was adopted.9 km/h High speed compaction speed。

But also for that large-area compaction operation task of the expressway,，HD 138i VV With the help of HAMMTRONIC Intelligent walking function of intelligent compaction control system，The operator can easily set the maximum walking speed by clicking on the operation panel.，This also avoids the human error of overspeed compaction that may occur during the rush work.。Make it easier for the operator to operate.，There is no need to worry about the quality hidden danger of over-speed rolling.。

Plus the intimate automatic slow start and stop function，Ven when reciprocating high-speed compaction，It can also avoid the phenomena of bag crowding and hole digging which are easy to occur in manual operation during starting and stopping in the past.。These walking intelligent control details，Make the compaction effect less affected by the actual experience and operation level of the operator.，It can effectively improve the uniformity and flatness of the whole compaction.。

   Front and rear wheels 60 Hz High frequency vibration，Set by the maximum travel speed，Ensure that the compaction speed is maintained at 5.9 km/h Without worrying about the risk of overspeed.

   Flat surface course without small waves after high-speed compaction

   Start and stop without worrying about digging holes and hugging bags.

Wei has something to say

High quality，It is the persistent polishing of details.，It is a quantitative change with continuous technical improvement.，Finally, it contributes to the qualitative change of high-quality compaction effect and construction efficiency.，This is the new generation of Hummer. HD The purpose of series R & D and design，Provide customers with future-oriented compaction needs，Professional solutions for green energy conservation。

The promotion activities and test drive activities of the four new products of Wirtgen agents in China are in full swing.，You are welcome to contact the local agent of Wittgen in China to understand and personally experience the new machine.。

Special thanks for providing site information：Liu Qingdong, Wittgen China Demonstration Team