Article List

• Factors affecting return speed of hydraulic cylinder and solution strategies

  The return spring of the reversing valve of the hydraulic press not only has insufficient elasticity, but also has a skew phenomenon, causing the spool of the reversing valve to fail to return to its original position after a power outage. Therefore, the opening of the slide valve is too small, which throttles the oil passing through the reversing valve. The initial movement of the hydraulic cylinder is slow. When the temperature is low, the viscosity of the hydraulic oil is relatively high and the mobility is poor, resulting in the slow movement of the hydraulic cylinder. If the outside temperature is really too low, you can use a heater or corresponding insulation measures to increase the oil temperature at startup. The contamination of the oil should be checked; check whether dirt or colloid deposits are blocking the valve core or valve hole, and check the wear of the valve body. The throttling resistance in the control pipeline may be too large, the flow valve is improperly adjusted, the control pressure is inappropriate, and the pressure source is interfered with. The control pressure of the hydraulic system of the hydraulic press is too low. The piston rod of the hydraulic press is stuck with the cylinder or the hydraulic cylinder is blocked. The way to cover it is to promptly replace the hydraulic oil with better viscosity and temperature resistance. If the outside temperature

  Technical Articles October 13, 2025
• Hazards of excessive temperature of servo hydraulic press

  Hazards of excessive temperature of servo hydraulic press 1. The temperature of the servo hydraulic press itself is too high, which reduces the viscosity of the oil and the leakage increase, and the efficiency of the system and the capacity base of the pump will be reduced. The oil film of moving parts such as slide valves will become thinner and produces greater friction resistance, resulting in increased wear and affects the inability to operate the machine. 2. The temperature of the equipment is too high, causing it to deform itself. Different moving parts in the hydraulic components have different degrees of thermal expansion, which will cause jamming due to the small gap between them at the same time, thus reducing the working efficiency of the servo hydraulic press. 3. Excessive temperature causes the service life of hydraulic oil to be greatly reduced, blocking the gap between the small holes, causing the pressure valve to not work normally. 4. Excessive temperature rise causes the rubber seal to deform, accelerate the aging degree, and cause leakage. 5. The excessive temperature reduces the air separation pressure of the oil, resulting in a decrease in the working performance of the hydraulic system. Therefore, we must follow the different load requirements of the servo hydraulic press and enter it

  Technical Articles October 02, 2025
• The pressure cannot be adjusted during operation of the four-column press

  When a failure of the hydraulic press cannot rise, it usually manifests as if the pressure-regulating handwheel is fully tight, the pressure can only rise to a certain value and cannot continue to rise, especially when the oil temperature is high, which is particularly obvious. So what are the reasons for the pressure not rise? 1. Check whether the cartridge valve and the reversing valve are stuck 2. Check the circuit failure, which may be the main reason for the inability to rise under normal circumstances. It is recommended to use a screwdriver to stab the small reversing valve to see if it is stuck, and then check whether the indicator light of the rising small valve is on. 3. The main relief valve in the four-column press system is worn seriously, causing overflow and debris, which is why it is stuck. 4. The flush valve on the upper part of the oil cylinder is not opened, so it cannot rise under normal circumstances. 5. Check whether the oil cylinder is broken. 6. Whether the four-column press system is adjusted and balanced and stuck the beam, of course, there are not many such problems. 7. Total pump flow

  Technical Articles September 18, 2025
• Professor Chen from Nanjing University of Technology and his party visited Zhongshan Wanda Machinery to explore the technological innovation of ultra-high pressure wire winding hydraulic presses

  Professor Chen from Nanjing University of Technology and his party visited our company to conduct in-depth exchanges on the ultra-high pressure wire winding hydraulic press technology project. The two sides discussed in-depth key issues such as breakthrough in technological research and development bottlenecks and future cooperation directions, laying a solid foundation for promoting the innovative application of this technology in the industrial field.

  Company News September 02, 2025
• How to determine whether the oil filter of the hydraulic press is blocked

  You can use the following methods to determine whether the oil filter of the oil press is blocked: 1. Observe the appearance of the oil filter: Check the oil filter housing. If there is obvious accumulation of sludge and dirt, or there is obvious oil stain attachment in the inlet and outlet pipelines of the oil filter, it may imply that the oil filter is blocked. In addition, some oil filters have clogged indicators that indicate that the oil filter is clogged when the indicator shows a red or a warning sign pops up. 2. Feel the oil temperature change: blockage of the oil filter will cause the oil to flow poorly, causing the system to heat up and the oil temperature to rise. Therefore, if it is found that the oil temperature rises faster than usual during normal operation of the oil press, or the oil temperature is significantly higher, consider whether the oil filter is blocked. However, the increase in oil temperature may also be caused by other reasons, such as cooling system failure, and comprehensive judgment is required. 3. Check system pressure: Blockage of the oil filter will increase oil flow resistance, resulting in system pressure drop or instability. If the hydraulic press is working

  Technical Articles August 25, 2025
• Bada Party Branch actively participates in the prevention and control of mosquito-borne infectious diseases and the improvement of human living environment in Banfu

  At present, it is the peak period for mosquito-borne infectious diseases such as chikungunya fever. In order to effectively prevent and control mosquito-borne diseases such as chikungunya fever and dengue fever, and to ensure the health of the people, the party organizations in Banfu Town have taken active actions. The Bada Party Branch actively responded to the call. From late July to early August, it organized party member volunteers to participate in chikungunya fever prevention and control and human settlement environment improvement volunteer activities, contributing to protecting residents' health. On July 28, party member volunteers from Bada Branch went to Huzhou Village to carry out prevention and control volunteer activities. During the event, volunteers found that some residents had piles of wooden huts and wet wooden huts in their homes. These hidden and humid environments are very likely to become breeding grounds for mosquitoes. Volunteers worked together to help residents rectify these areas, pick and remove some houses with hidden dangers, reduce mosquito habitats from the source, and reduce the risk of mosquito-borne infectious diseases.

  Company News August 12, 2025
• Banfu Town receives mosquito media prevention and control materials Social forces help Chikungunya heat prevention and control

  On August 8, a significant donation ceremony for mosquito media prevention and control materials was held in our town. With heavy love, the Banfu Branch of Zhongshan City Personal Association donated a batch of prevention and control materials to our town, injecting strong impetus into the prevention and control of chikungunya. Ni Xiaoping, deputy secretary of the town party committee and mayor, and Huang Zhimin, deputy mayors and Ou Yanting attended the donation ceremony and witnessed this warmth and responsibility together. At present, the prevention and control of chikungunya is in a critical period, which is affecting the hearts of all sectors of society. In order to promptly solve the demand for prevention and control materials, the Banfu Branch of Zhongshan Personal Private Association quickly responded to the call of the town party committee and government for prevention and control work, and issued an initiative as soon as possible to widely gather members' strength to participate in the prevention and control work of mosquito media. Among the many positive response forces, Zhongshan Wanda Machinery Automation Co., Ltd. and its affiliated Bada Party Branch performed particularly well.

  Company News August 09, 2025
• Celebration of the ceiling ceremony of Building 5, Zhongshan Wanda Machinery Automation Technology Co., Ltd.

  On July 9, 2025, Zhongshan Wanda Machinery Automation Technology Co., Ltd. ushered in a milestone moment—the top-up ceremony for building 5 of the new factory was grandly held.

  Company News July 22, 2025
• Common factors for low pressure in the hydraulic press system

  The low pressure of the hydraulic press system may be caused by a variety of reasons. The following are some common factors: The wear of the pump of a failed hydraulic pump: After the hydraulic pump is used for a long time, internal components such as plungers, cylinders, distribution plates, etc. will be worn, resulting in a decrease in the volume efficiency of the pump and a decrease in the output flow, which will make the system pressure unable to be raised. Pump drive problems: Failure of the drive motor of the hydraulic pump, slipping of the transmission belt or damage to the coupling will cause the pump to fail to operate normally or the speed is insufficient, which will affect the pump's output flow and pressure. The set pressure of the relief valve is too low: the set pressure of the relief valve determines the maximum working pressure of the system. If the set value is too low, the system pressure cannot be raised to the required value. The relief valve spool is stuck in the open position due to impurities, oil stains or other reasons, which will cause hydraulic oil to flow directly back to the oil tank through the relief valve, resulting in the system pressure not being established. Hydraulic oil problem insufficient oil: hydraulic pressure in the oil tank

  Technical Articles August 02, 2025
• Thanksgiving, we will open a new chapter together - Our company debuts at the first Shanxi (Dingxiang) Flange Forging Industry Expo

  Thanksgiving comes, and we open a new chapter together - Our company debuts at the first Shanxi (Dingxiang) Flange Forging Industry Expo in July, and the forging industry is in full swing. The grand opening of the first Shanxi (Dingxiang) Flange Forging Industry Expo not only sets up a new platform for exchanges and cooperation for the industry, but also gives us the honor to gather at the booth with the leaders of the Shanxi Provincial Department of Commerce, the Dingxiang County People's Government and the Hubei Forging Association, draw strength to forge ahead through careful guidance and anchor the development direction in in-depth exchanges. This trust and affirmation is not only a recognition of our deep cultivation and forging of strength in the field, but also an expectation for us to take root in Shanxi and serve regional industrial upgrading. As active participants in the first expo, we are well aware of the milestone significance of this grand event - it is not only a concentrated display of the industrial heritage of Dingxiang' 'China's Forging Hometown' but also an important signal for Shanxi's forging industry to move towards high-quality development. From displaying technical achievements at the booth to the same as the industry

  Company News July 26, 2025