Rapid Emergency On-site Service for 160T Servo Punch Press Uncoiler Hydraulic Cylinder Oil Leakage

After-Sales Press Release: Rapid Emergency On-site Service for 160T Servo Punch Press Uncoiler Hydraulic Cylinder Oil Leakage, Minimize Customer Downtime and Demonstrate Full-Cycle Responsive After-Sales Support

1.1 News Lead

For precision metal stamping manufacturers, stable coil feeding system is the foundation of continuous mass production. The hydraulic cylinder on the material uncoiler is responsible for expanding and contracting the material reel to clamp the raw coil. Once hydraulic oil leakage occurs, the reel clamping force will become unstable, the coil will slip during feeding, oil contamination will pollute strip surface, and in serious cases, the whole stamping line must stop production. Every minute of equipment shutdown brings tangible losses: suspended workpiece production, delayed order delivery and extra cleaning work for oil contamination.

Recently, our after-sales service hotline received an emergency service request from a precision automotive component manufacturer in South China. The customer’s production cell adopts a 160T servo punch press matched with automatic hydraulic uncoiler, which is used for continuous stamping of automotive structural metal parts. During morning shift production, operators found oil dripping from the hydraulic cylinder of the material rack. As leakage gradually worsened, the expansion force of the material reel became unstable, the steel coil slipped occasionally, hydraulic oil splashed and contaminated the raw metal strip, resulting in surface oil stains and increased product reject risk. Faced with potential line halt risk, the customer immediately contacted our after-sales team.

Our company implements a 24-hour emergency after-sales response mechanism for stamping equipment. After receiving the service ticket, our technical support engineer responded within 30 minutes, carried out remote preliminary fault judgment, guided the customer to safely shut down the equipment and isolate the hydraulic circuit to prevent further oil spill pollution. Meanwhile, the regional field service engineer was arranged immediately, with original sealing kits, hydraulic oil and professional maintenance tools prepared in advance, and rushed to the customer workshop within 12 hours. The rapid deployment fully reflects our commitment to customer production continuity, and embodies the high efficiency and professionalism of our full-lifecycle after-sales service system.

1.2 On-Site Diagnosis & Service Execution

After arriving at the site, our service engineer first implemented safety lockout procedures for the whole stamping cell to eliminate hydraulic pressure release risk and ensure safe maintenance operation. Systematic inspection was then performed on the hydraulic cylinder assembly of the uncoiler. Visual inspection found continuous oil seepage at the cylinder rod gland. After disassembly inspection, two root causes were identified. First, the ageing of piston rod sealing rings caused seal failure; long-time reciprocating movement and oil temperature fluctuation gradually hardened the rubber sealing elements, leading to poor sealing performance. Second, tiny metal particles from workshop environment scratched partial area of the piston rod surface. The scratches damaged the oil film, accelerated seal wear and triggered continuous leakage. If simply replacing the sealing ring without checking the rod surface, the new seals would be worn quickly and leakage would reoccur in a short production cycle.

Our engineer adopted a complete repair scheme instead of simple part replacement. Firstly, clean the cylinder cavity, piston assembly and oil passage thoroughly to remove residual old hydraulic oil, metal debris and sludge. Polish the slight scratches on piston rod surface with professional fine abrasive tool to restore smooth surface. Then install brand-new original high-temperature resistant sealing ring set, assemble the cylinder assembly strictly following torque specification, refill with matched brand hydraulic oil, exhaust air inside hydraulic circuit, and carry out pressure holding test. After static pressure holding test passed, the engineer conducted low-speed trial operation, adjusted the hydraulic pressure parameter of material rack reel expansion, and monitored cylinder sealing condition and reel clamping stability in real time.

Beyond fault repair, our after-sales team took this opportunity to provide extra value-added service for the customer. We inspected the whole hydraulic station, oil filter, pipeline connectors and pressure gauge of the material rack, checked the wear condition of other hydraulic seals, and found potential hidden danger of loose pipeline joint. The engineer tightened the joint on site to prevent future leakage failure. Meanwhile, we trained the on-site operators and maintenance technicians, explaining the early identification method of hydraulic oil leakage, daily inspection checklist of hydraulic cylinder, oil temperature monitoring and hydraulic oil replacement standard, helping the customer build daily preventive maintenance capability.

1.3 Post-Repair Verification & Service Outcome

After the whole repair and commissioning work finished, we carried out a continuous 180-minute full-load production verification on the 160T servo punch press production line. The material rack hydraulic cylinder kept good sealing without any oil dripping or seepage. The reel expansion pressure maintained stable within the design range, no coil slipping occurred during feeding, no oil contamination appeared on the metal strip surface. The stamped workpieces met drawing requirements completely, and the production line successfully resumed full-speed stamping production.

The customer expressed high recognition for our after-sales service. They praised our rapid response speed, professional fault diagnosis and comprehensive maintenance work. It is not only solving the oil leakage problem, but also helping them eliminate potential hidden risks and learn systematic maintenance knowledge. This service case fully demonstrates our company’s after-sales philosophy: service does not end at equipment delivery. We provide customers with rapid response, on-site troubleshooting, genuine spare parts, value-added training and long-term technical consultation, to safeguard stable operation of stamping production lines and minimize downtime losses for customers.

1.4 Press Release Data Table

1.5 Press Release Exclusive Q&A

Q1: What hazards will be caused by hydraulic cylinder oil leakage of the material rack for 160T servo punch press stamping line? A1: Oil leakage will lead to unstable reel clamping force, causing coil slipping and feeding position deviation, resulting in workpiece dimensional non-conformity. Spilled hydraulic oil contaminates metal strip, increasing scrap rate; oil drops may fall on die surface and bring safety hazard. Severe leakage will cause insufficient hydraulic pressure, directly shut down the production line. Long-term oil loss also damages hydraulic pump and valve components, bringing higher overhaul cost.

Q2: Why cannot we only replace sealing rings to solve hydraulic cylinder leakage fault? A2: If there are scratches on the piston rod metal surface, even new sealing rings are installed, the sharp scratches will continuously scrape the seal lip. The new seals will be damaged rapidly, and oil leakage will recur after a short running period. Surface inspection and polishing treatment must be performed before seal replacement to guarantee long-term repair effect.

Q3: What are the highlights of your company’s after-sales emergency service for punch press and peripheral equipment? A3: We maintain 24/7 after-sales hotline. Once receiving failure report, engineers respond rapidly within 30 minutes for remote guidance and preliminary diagnosis. Regional service engineers carry original spare parts to the site, not only repair the existing fault, but also inspect the whole hydraulic system to discover hidden risks. In addition, free on-site operation and maintenance training is provided for customer team to realize prevention in advance.

Q4: What routine inspection items help prevent hydraulic cylinder leakage of uncoiler? A4: Daily visual inspection for oil seepage on cylinder rod and gland; monitor hydraulic oil temperature on HMI every shift; monthly check the cleanness of hydraulic oil and filter element; inspect piston rod surface for scratches, dents and corrosion quarterly; regularly check pipeline joints and replace ageing sealing components according to service cycle.

Q5: What should operators do immediately once hydraulic oil leakage of material rack cylinder is found? A5: Stop feeding and punch press operation safely, cut off hydraulic power source and release residual pressure. Isolate the hydraulic circuit to avoid continuous oil spill and pollution. Contact our after-sales hotline immediately, do not disassemble hydraulic cylinder by yourself to prevent pressure ejection injury or secondary component damage.

Q6: What spare parts does your company recommend customers to stock for material rack hydraulic system? A6: Original hydraulic cylinder seal kits, high-quality hydraulic filter elements, matching hydraulic oil, pipeline sealing gaskets and quick connector spare parts. Our after-sales team can help customers formulate personalized wearing parts inventory list, greatly shorten maintenance time when hydraulic failure occurs.